- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                               ----------------

                                   Form 10-Q

                               ----------------

(Mark One):

[X] Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934. For the quarterly period ended September 30, 2001.

[_] Transition report pursuant to Section 13 or 15(d) of the Securities
    Exchange Act of 1934.

                       Commission File Number: 001-14195

                               ----------------

                          American Tower Corporation
            (Exact name of registrant as specified in its charter)

              Delaware                                 65-0723837
   (State or other jurisdiction of                  (I.R.S. Employer
   Incorporation or Organization)                  Identification No.)

                             116 Huntington Avenue
                          Boston, Massachusetts 02116
                   (Address of principal executive offices)

                        Telephone Number (617) 375-7500
             (Registrant's telephone number, including area code)

  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days: Yes [X] No [_]

Outstanding at November 1, Class of Common Stock 2001 - --------------------- ----------- Class A Common Stock................................................ 184,826,952 Class B Common Stock................................................ 8,001,769 Class C Common Stock................................................ 2,267,813 ----------- Total............................................................. 195,096,534 ===========
- ------------------------------------------------------------------------------- - ------------------------------------------------------------------------------- AMERICAN TOWER CORPORATION INDEX
Page No. -------- PART I. FINANCIAL INFORMATION Item 1. Unaudited Condensed Consolidated Financial Statements Condensed Consolidated Balance Sheets as of September 30, 2001 and December 31, 2000................................................. 1 Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2001 and 2000..................... 2 Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2001 and 2000................................. 3 Notes to Condensed Consolidated Financial Statements............... 4 Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations................................................. 12 Item 3. Quantitative and Qualitative Disclosures about Market Risk..... 30 PART II. OTHER INFORMATION Item 1. Legal Proceedings.............................................. 32 Item 2. Changes in Securities and Use of Proceeds...................... 32 Item 5. Other Information.............................................. 32 Item 6. Exhibits and Reports on Form 8-K............................... 32 Signatures............................................................. 34
PART I. FINANCIAL INFORMATION ITEM 1. UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AMERICAN TOWER CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS--Unaudited (In Thousands, Except Share Data)
September 30, December 31, 2001 2000 ------------- ------------ ASSETS Current Assets: Cash and cash equivalents.......................... $ 276,094 $ 82,038 Restricted cash and investments.................... 62,225 46,036 Accounts receivable, net of allowance for doubtful accounts of $28,565 and $19,809, respectively..... 204,273 194,011 Prepaid and other current assets................... 64,068 42,377 Inventories........................................ 50,414 47,872 Cost and earnings in excess of billings on uncompleted contracts and unbilled receivables.... 67,943 43,652 Deferred income taxes.............................. 15,175 15,166 ---------- ---------- Total current assets............................... 740,192 471,152 ---------- ---------- Property and equipment, net......................... 3,177,651 2,296,670 Goodwill and other intangible assets, net........... 2,513,923 2,505,681 Deferred income taxes............................... 226,642 140,395 Other long-term assets.............................. 260,101 246,781 ---------- ---------- Total.............................................. $6,918,509 $5,660,679 ========== ========== LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities: Current portion of long-term obligations........... $ 12,169 $ 11,178 Accounts payable and accrued expenses.............. 171,331 161,337 Accrued tower construction costs................... 29,639 45,315 Accrued interest................................... 39,825 31,708 Billings in excess of costs on uncompleted contracts and unearned revenue.................... 50,948 48,248 ---------- ---------- Total current liabilities.......................... 303,912 297,786 ---------- ---------- Long-term obligations............................... 3,536,018 2,457,045 Other long-term liabilities......................... 57,145 12,472 ---------- ---------- Total liabilities.................................. 3,897,075 2,767,303 ---------- ---------- Minority interest in subsidiaries................... 5,411 16,346 ---------- ---------- COMMITMENTS AND CONTINGENCIES STOCKHOLDERS' EQUITY: Preferred Stock; $0.01 par value; 20,000,000 shares authorized; no shares issued or outstanding........ Class A Common Stock; $0.01 par value; 500,000,000 shares authorized; 184,961,549 and 170,180,549 shares issued, 184,816,952 and 170,035,952 shares outstanding, respectively.......................... 1,850 1,701 Class B Common Stock; $0.01 par value; 50,000,000 shares authorized; 8,001,769 and 8,095,005 shares issued and outstanding, respectively............... 80 81 Class C Common Stock; $0.01 par value; 10,000,000 shares authorized; 2,267,813 shares issued and outstanding, respectively.......................... 23 23 Additional paid-in capital.......................... 3,636,142 3,174,622 Accumulated other comprehensive loss................ (22,290) Accumulated deficit................................. (595,442) (295,057) Less: Treasury stock (144,597 shares of Class A Common Stock at cost)............................. (4,340) (4,340) ---------- ---------- Total stockholders' equity......................... 3,016,023 2,877,030 ---------- ---------- Total.............................................. $6,918,509 $5,660,679 ========== ==========
See notes to condensed consolidated financial statements. 1 AMERICAN TOWER CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS--Unaudited (In Thousands, Except Per Share Data)
Three Months Ended Nine Months Ended September 30, September 30, ------------------- -------------------- 2001 2000 2001 2000 --------- -------- --------- --------- REVENUES: Rental and management............. $ 120,032 $ 75,535 $ 317,736 $ 192,475 Network development services...... 118,762 91,185 325,705 203,363 Satellite and fiber network access services......................... 57,402 42,238 178,191 95,684 --------- -------- --------- --------- Total operating revenues...... 296,196 208,958 821,632 491,522 --------- -------- --------- --------- OPERATING EXPENSES: Operating expenses excluding depreciation and amortization, and development and corporate general and administrative expenses: Rental and management........... 58,605 37,335 155,742 97,117 Network development services.... 105,609 75,741 290,190 173,068 Satellite and fiber network access services................ 55,353 32,060 169,467 74,318 Depreciation and amortization..... 118,898 75,973 317,853 198,264 Development expense............... 1,736 5,311 7,038 10,495 Corporate general and administrative expense........... 7,353 3,442 18,887 9,957 --------- -------- --------- --------- Total operating expenses...... 347,554 229,862 959,177 563,219 --------- -------- --------- --------- LOSS FROM OPERATIONS................ (51,358) (20,904) (137,545) (71,697) --------- -------- --------- --------- OTHER INCOME (EXPENSE): Interest expense.................. (73,483) (41,752) (210,223) (112,339) Interest income and other, net.... 720 6,560 13,578 12,997 Interest income, TV Azteca, net... 3,627 3,607 10,747 9,070 Loss on investment in US Wireless......................... (1,182) (23,408) Note conversion expense........... (26,336) (26,336) (16,968) Minority interest in net (earnings) losses of subsidiaries..................... (19) 140 (16) 82 --------- -------- --------- --------- Total other expense........... (96,673) (31,445) (235,658) (107,158) --------- -------- --------- --------- LOSS BEFORE INCOME TAXES AND EX- TRAORDINARY LOSSES................. (148,031) (52,349) (373,203) (178,855) INCOME TAX BENEFIT.................. 23,093 12,822 72,818 43,036 --------- -------- --------- --------- LOSS BEFORE EXTRAORDINARY LOSSES.... (124,938) (39,527) (300,385) (135,819) EXTRAORDINARY LOSSES ON EXTINGUISHMENT OF DEBT, NET OF INCOME TAX BENEFIT OF $2,892............................. (4,338) --------- -------- --------- --------- NET LOSS............................ $(124,938) $(39,527) $(300,385) $(140,157) ========= ======== ========= ========= BASIC AND DILUTED LOSS PER COMMON SHARE AMOUNTS Loss before extraordinary losses.. $ (0.65) $ (0.22) $ (1.58) $ (0.82) Extraordinary losses.............. (0.03) --------- -------- --------- --------- NET LOSS............................ $ (0.65) $ (0.22) $ (1.58) $ (0.85) ========= ======== ========= ========= WEIGHTED AVERAGE COMMON SHARES OUT- STANDING........................... 193,135 178,056 190,380 165,244 ========= ======== ========= =========
See notes to condensed consolidated financial statements. 2 AMERICAN TOWER CORPORATION AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS--Unaudited (In Thousands)
Nine Months Ended September 30, ---------------------- 2001 2000 ---------- ---------- CASH FLOWS USED FOR OPERATING ACTIVITIES Net loss............................................. $ (300,385) $ (140,157) Non-cash items reflected in statement of operations.. 343,293 190,862 Increase in current assets........................... (52,371) (114,837) (Decrease) increase in current liabilities........... (11,555) 26,351 ---------- ---------- Cash used for operating activities..................... (21,018) (37,781) ---------- ---------- CASH FLOWS USED FOR INVESTING ACTIVITIES: Payments for purchase of property and equipment and construction activities............................. (441,867) (346,161) Payments for acquisitions, net of cash acquired...... (688,557) (1,163,281) Deposits, investments and other...................... (72,116) (97,435) ---------- ---------- Cash used for investing activities..................... (1,202,540) (1,606,877) ---------- ---------- CASH FLOWS FROM FINANCING ACTIVITIES: Borrowings under credit facilities and other debt.... 181,500 1,377,500 Proceeds from senior notes offering.................. 1,000,000 Proceeds from convertible notes offering............. 450,000 Repayment of notes payable and credit facilities..... (77,691) (496,729) Net proceeds from equity offerings and stock options............................................. 365,684 532,548 Deferred financing costs, restricted cash and investments and other............................... (51,879) (37,403) ---------- ---------- Cash provided by financing activities.................. 1,417,614 1,825,916 ---------- ---------- NET INCREASE IN CASH AND CASH EQUIVALENTS.............. 194,056 181,258 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD......... 82,038 25,212 ---------- ---------- CASH AND CASH EQUIVALENTS, END OF PERIOD............... $ 276,094 $ 206,470 ========== ========== CASH PAID FOR INCOME TAXES............................. $ 4,998 $ 2,772 ========== ========== CASH PAID FOR INTEREST................................. $ 196,586 $ 93,848 ========== ========== NON-CASH TRANSACTIONS: Issuance of common stock, warrants and options for acquisitions........................................ $ 7,077 $ 145,852 Issuance of common stock for equity investment....... 2,464 Treasury stock transactions.......................... 2,752 Note conversion transaction (including note conversion expense)................................. 60,107 136,400 TV Azteca transaction................................ 25,819 Capital leases....................................... 31,853 38,529 Note receivable converted to investment.............. 7,772
See notes to condensed consolidated financial statements. 3 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited 1. Basis of Presentation and Accounting Policies The accompanying condensed consolidated financial statements have been prepared by American Tower Corporation (the Company) without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). The financial information included herein is unaudited; however, the Company believes such information and the disclosures are adequate to make the information presented not misleading and reflect all adjustments (consisting only of normal recurring adjustments) that are necessary for a fair presentation of financial position and results of operations for such periods. Results of interim periods may not be indicative of results for the full year. These condensed consolidated financial statements and related notes should be read in conjunction with the Company's 2000 Annual Report on Form 10-K. Use of Estimates--The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results may differ from those estimates, and such differences could be material to the accompanying condensed consolidated financial statements. Loss Per Common Share--Basic and diluted loss per common share has been computed by dividing the Company's net loss by the weighted average number of common shares outstanding during the period. Diluted per share amounts are computed by adjusting the weighted average number of common shares for dilutive potential common shares outstanding during the period, if any. In computing diluted per share amounts, the Company uses the treasury stock method, whereby unexercised options and warrants are assumed to be exercised at the beginning of the period or at issuance, if later. The assumed proceeds are then used to purchase common shares at the average market price during the period. Shares issuable upon exercise of options, warrants and other dilutive securities have been excluded from the computation of diluted loss per common share as the effect is anti-dilutive. Had options, warrants and other dilutive securities been included in the computation, weighted average shares for the diluted computation would have increased by approximately 29.5 million and 38.4 million for the three months ended September 30, 2001 and 2000, respectively, and 32.3 million and 40.3 million for the nine months ended September 30, 2001 and 2000, respectively. Recent Accounting Pronouncements--On January 1, 2001, the Company adopted the provisions of Statement of Financial Accounting Standard (SFAS) No. 133 "Accounting for Derivative Instruments and Hedging Activities". This statement establishes accounting and reporting standards for derivative instruments. Specifically, it requires that an entity recognize all derivatives as either assets or liabilities on the balance sheet at fair value. The accounting for changes in the fair market value of a derivative (that is unrealized gains or losses) is recorded as a component of an entity's net income or other comprehensive income, depending upon designation (as defined in the statement). The cumulative effect of adopting this statement resulted in a charge to other comprehensive income of $7.9 million, net of tax. The Company is exposed to interest rate risk relating to variable interest rates on its credit facilities. As part of its overall strategy to manage the level of exposure to the risk of interest rate fluctuations, the Company uses interest rate swaps, caps and collars, which qualify and are designated as cash flow hedges. The Company also uses swaptions to manage interest rate risk, which have not been designated as cash flow hedges. During the nine months ended September 30, 2001, the Company recorded an unrealized loss, excluding the charge for the cumulative effect of adopting SFAS No. 133, of approximately $21.1 million (net of a tax benefit of approximately $11.4 million) in other comprehensive loss for the change in fair value of cash flow hedges and reclassified $6.1 million (net of a tax benefit of approximately $3.3 million) into results of operations. Hedge ineffectiveness resulted in a gain of approximately $1.6 million for the nine months ended September 30, 2001 and was recorded in "interest income and other, net". The Company records the changes in fair value of its derivative instruments that are not accounted for as hedges in "interest income and other, net". At September 30, 2001 the 4 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) fair value of the Company's derivative instruments represented a liability of approximately $39.8 million and is included in "other long-term liabilities". The Company estimates that approximately $16.5 million of derivative losses (net of tax benefit) included in other comprehensive loss will be reclassified into the statement of operations within the next twelve months. In June 2001, SFAS No. 141, "Business Combinations" was approved by the Financial Accounting Standards Board (FASB). SFAS No. 141 requires that the purchase method of accounting be used for all business combinations initiated after June 30, 2001. Goodwill and certain intangible assets will remain on the balance sheet and not be amortized. On an annual basis, and when there is reason to suspect that their values have been diminished or impaired, these assets must be tested for impairment, and write-downs may be necessary. The Company has not determined the impact that this statement will have on its consolidated financial position or results of operations. In June 2001, SFAS No. 142, "Goodwill and Other Intangible Assets" was approved by the FASB. SFAS No. 142 changes the accounting for goodwill and certain other intangibles from an amortization method to an impairment-only approach. Amortization of goodwill and certain other intangibles will cease upon adoption of this statement. The Company is required to implement SFAS No. 142 on January 1, 2002 and it has not determined the impact that this statement will have on its consolidated financial position or results of operations. Reclassifications--Certain reclassifications have been made to the 2000 condensed consolidated financial statements and related notes to conform to the 2001 presentation. 2. Income Taxes The Company provides for income taxes at the end of each interim period based on the estimated effective tax rate for the full fiscal year. Cumulative adjustments to the Company's estimate are recorded in the interim period in which a change in the estimated annual effective rate is determined. 3. Inventories Inventories are stated at the lower of cost or market, with cost being determined on the first-in, first-out (FIFO) basis. The components of inventories are as follows (in thousands):
September 30, 2001 December 31, 2000 ------------------- ----------------- Raw materials............................. $ 28,708 $ 20,887 Finished goods............................ 19,910 25,947 Work in process........................... 1,796 1,038 -------- -------- Total................................... $ 50,414 $ 47,872 ======== ========
5 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) 4. Acquisitions General--The acquisitions consummated during the nine month period ended September 30, 2001 have been accounted for by the purchase method of accounting. The purchase prices have been allocated to the net assets acquired, principally intangible and tangible assets, and the liabilities assumed based on their estimated fair values at the date of acquisition. The excess of purchase price over the estimated fair value of the net assets acquired has been recorded as goodwill and other intangible assets. For certain acquisitions, the condensed consolidated financial statements reflect the preliminary allocation of purchase prices, as the appraisals of assets acquired have not been finalized. The Company does not expect any changes in depreciation and amortization as a result of such appraisals to be material to the Company's consolidated results of operations. During the nine month period ended September 30, 2001, the Company acquired various communication sites and related businesses and satellite and fiber network access service assets for an aggregate preliminary purchase price of approximately $690.9 million. The total purchase price includes the payment of $683.8 million in cash and the issuance of 342,069 shares of Class A common stock valued at approximately $7.1 million. Included in the above are amounts paid by the Company in connection with our agreement with ALLTEL. With the exception of the ALLTEL transaction discussed below, none of the individual acquisitions consummated during the nine months ended September 30, 2001 was deemed significant. The following summarizes the ALLTEL transaction to date. ALLTEL transaction--In December 2000, the Company entered into an agreement to acquire the rights from ALLTEL to up to 2,193 communications towers through a fifteen-year sublease agreement. Under the agreement, the Company will sublease these towers for cash consideration of up to $657.9 million. ALLTEL also granted the Company the option to sublease approximately 200 additional towers (to be selected by the Company on a site-by-site basis) for cash consideration of up to $300,000 per tower. Under the agreement, the Company has the option to purchase the towers at the end of the fifteen-year term. During the nine months ended September 30, 2001, the Company subleased 1,406 towers and paid ALLTEL $421.8 million in cash. In addition, early in the fourth quarter of 2001, the Company subleased 259 towers and paid ALLTEL approximately $77.7 million in cash. The Company anticipates that it will only exercise its rights to sublease up to 1,850 towers in total under the ALLTEL agreement. The remaining closings are expected to occur during the balance of 2001 and in the first quarter of 2002. The following unaudited pro forma summary for the nine months ended September 30, 2001 and 2000 presents the condensed consolidated results of operations as if all of the acquisitions closing prior to September 30, 2001 (as referred to in the second paragraph of this note) had occurred as of January 1, 2000, after giving effect to certain adjustments, including depreciation and amortization and interest expense on debt incurred to fund the acquisitions. These unaudited pro forma results have been prepared for comparative purposes only and do not purport to be indicative of what would have occurred had the acquisitions been made as of January 1, 2000 or of results which may occur in the future.
Nine Months Nine Months Ended Ended September 30, September 30, 2001 2000 ------------- ------------- In thousands, except per share data: Revenues..................................... $ 838,254 $ 522,713 Net loss before extraordinary losses......... $(317,527) $(176,698) Net loss..................................... $(317,527) $(181,036) Basic and diluted loss per common share before extraordinary losses........................ $ (1.67) $ (1.07) Basic and diluted loss per common share...... $ (1.67) $ (1.09)
As of January 1, 2000, the Company had recorded a liability of approximately $1.2 million related primarily to contractual obligations assumed in its acquisition of towers from AT&T. During the nine month period ended 6 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) September 30, 2001, the Company recorded an additional liability of approximately $7.4 million related primarily to contractual obligations assumed in connection with its acquisition of Interpacket Networks, Inc. During that same period, the Company recorded charges against these liabilities of approximately $2.7 million. In addition, the Company reversed approximately $1.9 million related to these liabilities against goodwill and other intangible assets. As of September 30, 2001, the Company has a remaining liability of approximately $4.0 million all of which is related primarily to contractual obligations assumed in the Interpacket Networks, Inc. acquisition. Since October 1, 2001 (excluding the ALLTEL transaction discussed above), the Company has consummated acquisitions for an aggregate preliminary purchase price of $16.3 million. In addition, the Company is party to various agreements, including the remaining portions of the ALLTEL transaction (not disclosed above), relating to the acquisition of assets and businesses from third parties for an estimated aggregate cost of approximately $68.1 million. Such transactions are subject to the satisfaction of customary closing conditions, which are expected to be met during the balance of 2001 and in the first quarter of 2002. The Company may pursue the acquisition of other properties and businesses in new and existing locations, although we have not entered into any definitive material agreements with respect to such acquisitions. 5. Business Segments The Company operates in three business segments: rental and management (RM), network development services (Services), and satellite and fiber network access services (SFNA). The RM segment provides for leasing and subleasing of antennae sites on multi-tenant towers and the leasing of other properties to a diverse range of customers primarily in the wireless communications and broadcast industries. The Services segment offers a broad range of network development services, including radio frequency engineering, network design, site acquisition, construction, zoning and other regulatory approvals, component part sales and antennae installation. The SFNA segment offers satellite and fiber network services to telecommunications companies, internet service providers, broadcasters and maritime customers, both domestic and international. The accounting policies applied in compiling segment information below are similar to those described in the Company's 2000 Annual Report on Form 10-K. In evaluating financial performance, management focuses on operating profit (loss), excluding depreciation and amortization, development and corporate general and administrative expenses. This measure of operating profit (loss) is also before interest income and other, net, interest expense, loss on investment in US Wireless, note conversion expense, minority interest in net earnings of subsidiaries, income taxes and extraordinary losses. For reporting purposes, the RM segment includes interest income, TV Azteca, net. The Company's reportable segments are strategic business units that offer different services. They are managed separately because each segment requires different resources, skill sets and marketing strategies. All reported segment revenues are generated from external customers. Summarized financial information concerning the Company's reportable segments as of and for the three and nine months ended September 30, 2001 and 2000 is shown in the following table (in thousands). The "Other" column below represents amounts excluded from specific segments such as income taxes, extraordinary losses, corporate general and administrative expense, development expense, depreciation and amortization, loss on investment in US Wireless, note conversion expense, minority interest in net earnings of subsidiaries and interest. In addition, "Other" includes corporate assets such as cash and cash equivalents, restricted cash and investments, tangible and intangible assets and income tax accounts which have not been allocated to specific segments. 7 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued)
Three Months Ended September 30, RM Services SFNA Other Total - ------------------ ---------- -------- -------- --------- ---------- 2001 Revenues................. $ 120,032 $118,762 $ 57,402 $ 296,196 Operating profit (loss) ........................ 65,054 13,153 2,049 $(205,194) (124,938) Assets................... 4,783,644 785,979 631,705 717,181 6,918,509 2000 Revenues................. $ 75,535 $ 91,185 $ 42,238 $ 208,958 Operating profit (loss).. 41,807 15,444 10,178 $(106,956) (39,527) Assets................... 3,600,576 566,411 386,072 595,464 5,148,523
Nine Months Ended September 30, RM Services SFNA Other Total - ----------------- ---------- -------- -------- --------- ---------- 2001 Revenues................. $ 317,736 $325,705 $178,191 $ 821,632 Operating profit (loss) ........................ 172,741 35,515 8,724 $(517,365) (300,385) Assets................... 4,783,644 785,979 631,705 717,181 6,918,509 2000 Revenues................. $ 192,475 $203,363 $ 95,684 $ 491,522 Operating profit (loss).. 104,428 30,295 21,366 $(296,246) (140,157) Assets................... 3,600,576 566,411 386,072 595,464 5,148,523
6. Financing Transactions Equity offering--In January 2001, the Company completed a public offering of 10.0 million shares of its Class A common stock at $36.50 per share. The net proceeds of the offering (after deduction of offering expenses) were approximately $360.8 million. Proceeds from the offering have been and will be used to finance the construction of towers, fund pending and future acquisitions and for general corporate purposes. 9 3/8% Senior Notes offering--In January 2001, the Company completed a private notes placement of $1.0 billion 9 3/8% Senior Notes (Senior Notes), issued at 100% of their face amount. The Senior Notes mature on February 1, 2009. The Senior Notes rank equally with the Company's convertible notes and rank junior to all indebtedness of its subsidiaries including amounts outstanding under the Company's credit facilities. Interest on the Senior Notes is payable semiannually on February 1 and August 1, commencing on August 1, 2001. The indenture governing the Senior Notes contains certain restrictive covenants and ratios including restrictions on the Company's ability to incur more debt, guarantee debt, pay dividends and make certain investments. Proceeds from the Senior Notes placement have been and will be used to finance the construction of towers, fund pending and future acquisitions and for general corporate purposes. The amount outstanding under the Senior Notes was $1.0 billion as of September 30, 2001 and is included in long-term obligations in the accompanying September 30, 2001 condensed consolidated balance sheet. Mexican credit facility--In February 2001, the Company's Mexican subsidiary consummated a loan agreement that provides for borrowings of $95.0 million (U.S. Dollars). If additional lenders are made party to the agreement, the size of the facility may increase to $140.0 million. The Company has committed to loan its Mexican subsidiary up to $45.0 million if additional lenders are not made party to the agreement. The Company's commitment will be reduced on a dollar-for-dollar basis if additional lenders join the loan agreement. This facility requires the maintenance of various covenants and ratios and is guaranteed and collateralized by all of the assets of the Mexican subsidiary. Interest rates on the loan are determined at the Mexican subsidiary's option at either LIBOR plus margin or the Base Rate plus margin (each as defined in the agreement). The loan is due in 2003. The amount outstanding under the Mexican credit facility was approximately $95.0 million as of September 30, 2001 and is included in long-term obligations in the accompanying September 30, 2001 condensed consolidated balance sheet. 8 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) 7. Information Presented Pursuant to the Indenture for the Senior Notes The following table sets forth information that is presented solely to address certain reporting requirements contained in the indenture for the Senior Notes. This information presents certain financial data of the Company on a consolidated basis and on a restricted group basis, as defined in the indenture governing the Senior Notes. All of the Company's subsidiaries are part of the restricted group, except its wholly owned subsidiary, Verestar and its subsidiaries, whose operations constitute all of our satellite and fiber network access services business segment. This restricted group data is not intended to represent an alternative measure of operating results, financial position or cash flow from operations, as determined in accordance with generally accepted accounting principles.
Three Months Ended Nine Months Ended September 30, 2001 September 30, 2001 ----------------------- ----------------------- Restricted Restricted Consolidated Group (1) Consolidated Group (1) ------------ ---------- ------------ ---------- Statement of Operations Data (in thousands): Operating revenues........... $ 296,196 $ 238,794 $ 821,632 $ 643,441 --------- --------- --------- --------- Operating expenses: Operating expenses excluding depreciation and amortization, and development and corporate general and administrative expenses.................... 219,567 164,214 615,399 445,932 Depreciation and amortization................ 118,898 100,296 317,853 267,327 Development expense.......... 1,736 1,701 7,038 6,303 Corporate general and administrative expense...... 7,353 7,353 18,887 18,887 --------- --------- --------- --------- Total operating expenses... 347,554 273,564 959,177 738,449 --------- --------- --------- --------- Loss from operations......... (51,358) (34,770) (137,545) (95,008) Interest expense............. (73,483) (70,543) (210,223) (202,014) Interest income and other, net......................... 720 4,331 13,578 17,339 Interest income, TV Azteca, net of interest expense of $289 and $873 for the three and nine months ended September 30, 2001, respectively ............... 3,627 3,627 10,747 10,747 Loss on investment in US Wireless.................... (1,182) (1,182) (23,408) (23,408) Note conversion expense...... (26,336) (26,336) (26,336) (26,336) Minority interest in net earnings of subsidiaries.... (19) (19) (16) (16) --------- --------- --------- --------- Loss before income taxes and extraordinary losses........ $(148,031) $(124,892) $(373,203) $(318,696) ========= ========= ========= =========
September 30, 2001 ----------------------- Restricted Consolidated Group ------------ ---------- Balance Sheet Data (in thousands): Cash and cash equivalents.............................. $ 276,094 $ 264,311 Restricted cash and investments........................ 62,225 62,225 Property and equipment, net............................ 3,177,651 2,884,786 Total assets........................................... 6,918,509 6,286,804 Long-term obligations, including current portion....... 3,548,187 3,431,700 Net debt(2)............................................ 3,209,868 3,105,164 Total stockholders' equity............................. 3,016,023 3,016,023
- -------- (1) Corporate overhead allocable to Verestar and interest expense related to intercompany borrowings by Verestar (unrestricted subsidiary) have not been excluded from results shown for the restricted group. (2) Net debt represents long-term obligations, including current portion, less cash and cash equivalents and restricted cash and investments. 9 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) 8. Comprehensive Loss Other comprehensive loss consists primarily of foreign currency translation adjustments, derivative instruments accounted for as cash flow hedges, and the impact of the Company's adoption of SFAS No. 133 discussed in note 1. The components of the Company's comprehensive loss are as follows (in thousands):
Three Months Ended Nine Months Ended September 30, September 30, ------------------- -------------------- 2001 2000 2001 2000 --------- -------- --------- --------- Net loss............................ $(124,938) $(39,527) $(300,385) $(140,157) Other comprehensive loss, net of tax: Foreign currency translation adjustments and other............ 683 527 Derivative instruments: Net change in fair value of cash flow hedges.................... (12,667) (21,086) Amounts reclassified into results of operations.......... 5,583 6,121 --------- -------- --------- --------- Comprehensive loss before cumulative effect adjustment.................. (131,339) (39,527) (314,823) (140,157) Cumulative effect adjustment recorded upon the adoption of SFAS No. 133 (net of an income tax benefit of $4,227)................. (7,852) --------- -------- --------- --------- Comprehensive loss.................. $(131,339) $(39,527) $(322,675) $(140,157) ========= ======== ========= =========
9. Litigation The Company periodically becomes involved in various claims and lawsuits that are incidental to its business. In the opinion of management, after consultation with counsel, there are no matters currently pending which would, in the event of an adverse outcome, have a material impact on the Company's consolidated financial position, the results of its operations or liquidity. 10. Loss on Investment in US Wireless During the nine months ended September 30, 2001, the Company wrote-off its entire investment in US Wireless. The majority of the charge, $22.2 million, occurred in the second quarter 2001 as a result of an assessment that a loss in value of the Company's preferred stock investment had occurred that was other than temporary. The remaining portion of the Company's investment, $1.2 million, was written off in the third quarter after US Wireless filed for protection under Chapter 11 of the United States Bankruptcy Code. 11. Convertible Note Exchanges During the third quarter, the Company acquired approximately $82.5 million face amount ($61.6 million carrying amount) of its 2.25% convertible notes. The transactions were pursuant to exchange agreements which the Company negotiated with a limited number of noteholders. Pursuant to these exchange agreements, the Company issued an aggregate of 2.4 million shares of Class A common stock that these noteholders were entitled to receive based on the conversion price set forth in the applicable indenture, plus an additional 1.5 million shares of Class A common stock to induce them to convert their holdings prior to the first scheduled redemption date. As a result of these transactions, in the third quarter the Company recorded a non-cash charge of $26.3 million, which represents the fair market value of the inducement shares. The Company may negotiate similar exchanges for its outstanding convertible notes during the fourth quarter and from time to time in the future, subject to market conditions. To the extent that inducement shares are issued by the Company as part of any future exchanges, the Company expects to record additional non-cash charges. 10 AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS--Unaudited--(Continued) 12. Restructuring On November 6, 2001, the Company announced a restructuring of the organization to include a reduction in the scope of its tower development activities and the centralization of certain operating functions. As a result of these initiatives, the Company expects to record a restructuring charge of approximately $41.0 million to $44.0 million. Approximately $9.0 million of the charge is associated with consolidating operations and employee reductions within all of the Company's business segments and includes employee separation costs and office closings. The Company expects to record this component of the charge in the fourth quarter of 2001 and in the first quarter of 2002. The remaining component of the restructuring charge, $32.0 million to $35.0 million, will be a non-cash write off of construction in progress related to project sites that will be abandoned as a result of the overall reduction in the Company's tower construction activity. The entire construction in progress charge will be recorded in the fourth quarter of 2001. 13. Subsequent Events On October 21, 2001, the Company amended its credit facilities agreement to provide for a total borrowing capacity of up to $2.25 billion. That capacity is subject to covenant and ratio restrictions relating to operating cash flow and tower construction cost levels. The credit facilities now include a $650.0 million credit facility (fully available, subject to covenant and ratio restrictions), an $850.0 million multi-draw Term Loan A (fully drawn), a $500.0 million Term Loan B (fully drawn) and a $250.0 million multi-draw Term Loan C (fully available, subject to covenant and ratio restrictions). In addition, on October 11, 2001 the Company consummated the sale of 8.7% of its Mexican subsidiary, ATC Mexico Holding Corp. (ATC Mexico), to J. Michael Gearon, Jr., an executive officer and director of the Company, for $8.4 million. Under the terms of the sale the consideration paid by Mr. Gearon is in the form of $1.7 million in cash and a $6.7 million note. The note, which accrues interest and is payable quarterly, is secured by approximately 411,000 shares of Class A common stock of the Company owned by Mr. Gearon and his interest in ATC Mexico. The purchase price represented the fair market value of an 8.7% interest in ATC Mexico on the date of the sale as determined with the assistance of an independent appraiser. Mr. Gearon may require the Company to purchase his interest in ATC Mexico for its then fair market value, as determined by an independent appraiser, any time after the soonest to occur of July 1, 2004, a Change in Control (as defined in a stockholder agreement) of the Company or ATC Mexico, or Mr. Gearon's death or disability. The Company has the right to purchase Mr. Gearon's interest in ATC Mexico for its then fair market value, as determined by an independent appraiser, after the soonest to occur of July 1, 2005, Mr. Gearon's death or disability or on either a Gearon Termination Event or a Forfeiture Event (each as defined in a stockholder agreement). 11 ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS This Quarterly Report on Form 10-Q contains forward-looking statements relating to our goals, beliefs, plans or current expectations and other statements that are not of historical facts. For example, when we use words such as "project," "believe," "anticipate," "expect," "estimate," "intend," "should," "would," "could" or "may," or other words that convey uncertainty of future events or outcome, we are making forward-looking statements. We refer you to the information under the caption entitled "Factors that May Affect Future Results" below for important factors that could cause actual results to differ materially from those indicated by our forward-looking statements made herein. Forward-looking statements represent management's current expectations and are inherently uncertain. We do not undertake any obligation to update forward-looking statements made by us. We are a leading wireless and broadcast communications infrastructure company operating in three business segments. . Rental and management. We operate the largest network of wireless communications towers in North America and are the largest independent operator of broadcast towers in North America, based on number of towers. . Network development services. We provide comprehensive network development services and components for wireless service providers and broadcasters. . Satellite and fiber network access services. Our Verestar subsidiary is a leading provider of integrated satellite and fiber network access services based upon the number of teleport antennae and facilities. We provide these services to telecommunications companies, Internet service providers, broadcasters and maritime customers, both domestic and international. Results of Operations As of September 30, 2001, the Company owned and/or operated approximately 13,800 communications sites, as compared to approximately 10,300 communications sites as of September 30, 2000. The acquisitions consummated in 2001 and 2000 have significantly affected operations for the three and nine months ended September 30, 2001, as compared to the three and nine months ended September 30, 2000. See the notes to the condensed consolidated financial statements and the Company's Annual Report on Form 10-K for a description of the acquisitions consummated in 2001 and 2000. 12 Three Months Ended September 30, 2001 and 2000 (dollars in thousands)-- Unaudited
Three Months Ended September 30, Amount of Percentage ------------------- Increase Increase 2001 2000 (Decrease) (Decrease) --------- -------- ---------- ---------- Revenues: Rental and management............... $ 120,032 $ 75,535 $44,497 59% Network development services........ 118,762 91,185 27,577 30 Satellite and fiber network access services........................... 57,402 42,238 15,164 36 --------- -------- ------- Total revenues...................... 296,196 208,958 87,238 42 --------- -------- ------- Operating Expenses: Rental and management............... 58,605 37,335 21,270 57 Network development services........ 105,609 75,741 29,868 39 Satellite and fiber network access services........................... 55,353 32,060 23,293 73 --------- -------- ------- Total operating expenses excluding depreciation and amortization, development and corporate general and administrative expenses........ 219,567 145,136 74,431 51 --------- -------- ------- Depreciation and amortization....... 118,898 75,973 42,925 57 Development expense................. 1,736 5,311 (3,575) (67) Corporate general and administrative expense............................ 7,353 3,442 3,911 114 Interest expense.................... 73,483 41,752 31,731 76 Interest income and other, net...... 720 6,560 (5,840) (89) Interest income, TV Azteca, net of $289 and $296 of interest expense, respectively ...................... 3,627 3,607 20 1 Loss on investment in US Wireless... 1,182 1,182 N/A Note conversion expense............. 26,336 26,336 N/A Minority interest in net (earnings) losses of subsidiaries............. (19) 140 (159) (114) Income tax benefit.................. 23,093 12,822 10,271 80 --------- -------- ------- Net loss............................ $(124,938) $(39,527) $85,411 216% ========= ======== =======
Rental and Management Revenue Rental and management revenue for the three months ended September 30, 2001 was $120.0 million, an increase of $44.5 million from the three months ended September 30, 2000. The increase resulted primarily from two factors: the leasing activity on towers acquired and constructed from the period October 1, 2000 to September 30, 2001 and increased leasing activity on towers that existed as of September 30, 2000. From the period October 1, 2000 to September 30, 2001, we acquired approximately 2,200 towers and constructed more than 1,500 towers. Additionally, during that same period, we added approximately 4,900 broadband equivalent tenants to both newly acquired/constructed and existing towers. The Company anticipates that the majority of lease up activity moving into the fourth quarter of 2001 and into 2002 will continue to come from broadband type customers. This acquisition, construction and leasing activity has not only significantly increased revenue, but has also increased the scope, depth and strength of our national and international tower network, providing us with a much larger base of tower revenue for the three months ended September 30, 2001 as compared to the three months ended September 30, 2000. In the fourth quarter of 2001, the Company announced an initiative to reduce the scope of its tower development activities. This reduction will result in a significant decrease in new tower construction in the near term and in a more selective criteria in evaluating acquisitions. The intention of this initiative is twofold: to accelerate our overall return on investment and to preserve capital. We believe in any event, that our existing portfolio will continue to provide us with a solid foundation for future revenue growth. Notwithstanding our proposed scaleback of tower development activities, however, we continue to believe that our leasing revenues, which comprise our core business, are likely to grow at a more rapid rate than revenues from other segments of our business because of increasing utilization of existing tower capacity, recent and pending acquisitions and build-to-suit and other construction activities. 13 Network Development Services Revenue Network development services revenue for the three months ended September 30, 2001 was $118.8 million, an increase of $27.6 million from the three months ended September 30, 2000. The growth in revenues during the three months ended September 30, 2001 as compared to the three months ended September 30, 2000 resulted primarily from increased volume of services such as construction management, installation and related colocation services, tower maintenance services, and an increase in component sales driven primarily from an acquisition. Satellite and Fiber Network Access Services Revenue Satellite and fiber network access services revenue for the three months ended September 30, 2001 was $57.4 million, an increase of $15.2 million from the three months ended September 30, 2000. The majority of the increase resulted from the consummation of several key acquisitions that occurred in 2001 and 2000 including: Publicom, Interpacket Networks and a Satellite Network Access Point (SNAP) facility in Switzerland. These acquisitions significantly increased our service capabilities, revenue base, and geographical scope of customers, leading to significant incremental revenues in 2001. This increase in revenue was partially offset by the non-renewal of service contracts of several key customers and a decrease in demand for services in Latin America and from emerging telecommunications carriers. Rental and Management Expense Rental and management expense for the three months ended September 30, 2001 was $58.6 million, an increase of $21.3 million from the three months ended September 30, 2000. The majority of the increase resulted from incremental operating expenses incurred in the three months ended September 30, 2001 for the more than 3,700 towers that were acquired or constructed from the period October 1, 2000 to September 30, 2001 as discussed above. The balance of the increase reflects, to a lesser extent, increased bad debt expense for the segment as a whole and higher operating expenses for the three months ended September 30, 2001 related to towers that existed as of September 30, 2000. Network Development Services Expense Network development services expense for the three months ended September 30, 2001 was $105.6 million, an increase of $29.9 million from the three months ended September 30, 2000. The increase is primarily due to overall increases in the service volume discussed above, increases in the overhead costs necessary to support both internal construction and external sales and incremental expenses related to the consummation of an acquisition. Satellite and Fiber Network Access Services Expense Satellite and fiber network access services expense for the three months ended September 30, 2001 was $55.4 million, an increase of $23.3 million from the three months ended September 30, 2000. The primary reason for the increase relates to the incremental expenses attributable to the strategic acquisitions discussed above. Other components of the increase include increased personnel and infrastructure costs to help manage the growth of this segment and increased overhead related to the development and marketing of new product lines and, to a lesser extent, increased bad debt expense. Depreciation and Amortization Depreciation and amortization for the three months ended September 30, 2001 was $118.9 million, an increase of $42.9 million from the three months ended September 30, 2000. The principal component of the increase is an increase in depreciation expense of $28.1 million. This is primarily a result of the Company's purchase and acquisition of approximately $1.4 billion of property and equipment from the period October 1, 2000 to September 30, 2001. The other component of the increase is the increased amortization of $14.8 million, resulting from our recording and amortizing approximately $473.7 million of goodwill and other intangible assets related to acquisitions consummated from the period October 1, 2000 to September 30, 2001. 14 Development Expense Development expense for the three months ended September 30, 2001 was $1.7 million, a decrease of $3.6 million from the three months ended September 30, 2000. The majority of the decrease results from reduced expenses related to tower site inspections, data gathering and acquisition integration in the three months ended September 30, 2001. Corporate General and Administrative Expense Corporate general and administrative expense for the three months ended September 30, 2001 was $7.4 million, an increase of $3.9 million from the three months ended September 30, 2000. The majority of the increase is a result of expenses incurred to implement a new company-wide Enterprise Resource Planning (ERP) system, coupled with increased information technology and personnel costs related to supporting the Company's overall growth. Interest Expense Interest expense for the three months ended September 30, 2001 was $73.5 million, an increase of $31.7 million from the three months ended September 30, 2000. The majority of the increase, $26.9 million, resulted primarily from increased borrowings outstanding related to our credit facilities and senior notes, offset by a decrease in interest rates on our credit facilities. The remaining component of the increase represents increases in interest on capital leases and other notes payable and increased deferred financing amortization. Interest Income and Other, net Interest income and other, net for the three months ended September 30, 2001, was $0.7 million, a decrease of $5.8 million from the three months ended September 30, 2000. The decrease relates primarily to increased losses on equity investments and a decrease in interest earned on invested cash on-hand, offset, to a lesser extent, by foreign currency gains. Loss on Investment in US Wireless During the three months ended September 30, 2001, the Company wrote off the remaining portion, $1.2 million, of its investment in US Wireless. The non- cash charge was recorded after US Wireless filed for protection under Chapter 11 of the United States Bankruptcy Code on August 29, 2001. The Company had previously written off $22.2 million of its investment in the second quarter of 2001 after making an assessment that a loss in value in the Company's preferred stock investment had occurred that was other than temporary. Note Conversion Expense During the three months ended September 30, 2001, the Company acquired a portion of its 2.25% convertible notes in exchange for shares of its Class A common stock. As a consequence of those negotiated exchanges with certain of its noteholders, the Company recorded a non-cash charge of $26.3 million. The note conversion expense represents the fair value of incremental stock issued as an inducement to noteholders to convert their holdings prior to the first scheduled redemption date. There were no such exchanges during the three months ended September 30, 2000. See "Liquidity and Capital Resources-- Convertible Note Exchanges" for more information. Income Tax Benefit The income tax benefit for the three months ended September 30, 2001 was $23.1 million, an increase of $10.3 million from the three months ended September 30, 2000. The primary reason for the increase is a result of the increase in our loss before income taxes partially offset by an increase in amortization of non-deductible intangible assets arising from stock acquisitions, non-deductible note conversion expense and the valuation allowance related to our state net operating loss carryforwards. The effective tax rate differs in both periods from the statutory rate primarily due to the valuation allowance related to our state net operating loss carryforwards and the effect of non-deductible items, principally the amortization of intangible assets on certain stock acquisitions and non-deductible note conversion expense on which the Company has recorded no tax benefit. In assessing the realizability of the deferred tax asset, we analyzed our forecast of future taxable income and potential tax planning strategies and concluded that recoverability of the net deferred tax asset is more likely than not. 15 Nine Months Ended September 30, 2001 and 2000 (dollars in thousands)-- Unaudited
Nine Months Ended September 30, Amount of Percentage -------------------- Increase Increase 2001 2000 (Decrease) (Decrease) --------- --------- ---------- ---------- Revenues: Rental and management.............. $ 317,736 $ 192,475 $125,261 65% Network development services....... 325,705 203,363 122,342 60 Satellite and fiber network access services.......................... 178,191 95,684 82,507 86 --------- --------- -------- Total revenues..................... 821,632 491,522 330,110 67 --------- --------- -------- Operating Expenses: Rental and management.............. 155,742 97,117 58,625 60 Network development services....... 290,190 173,068 117,122 68 Satellite and fiber network access services.......................... 169,467 74,318 95,149 128 --------- --------- -------- Total operating expenses excluding depreciation and amortization, development and corporate general and administrative expenses....... 615,399 344,503 270,896 79 Depreciation and amortization...... 317,853 198,264 119,589 60 Development expense................ 7,038 10,495 (3,457) (33) Corporate general and administra- tive expense...................... 18,887 9,957 8,930 90 Interest expense................... 210,223 112,339 97,884 87 Interest income and other, net..... 13,578 12,997 581 4 Interest income, TV Azteca, net of $873 and $753 of interest expense, respectively ..................... 10,747 9,070 1,677 18 Loss on investment in US Wireless.. 23,408 23,408 N/A Note conversion expense............ 26,336 16,968 9,368 55 Minority interest in net (earnings) losses of subsidiaries............ (16) 82 (98) (120) Income tax benefit................. 72,818 43,036 29,782 69 Extraordinary losses on extinguish- ment of debt...................... 4,338 (4,338) (100) --------- --------- -------- Net loss........................... $(300,385) $(140,157) $160,228 114% ========= ========= ========
Rental and Management Revenue Rental and management revenue for the nine months ended September 30, 2001 was $317.7 million, an increase of $125.3 million from the nine months ended September 30, 2000. The increase resulted primarily from two factors: the leasing activity on towers acquired and constructed from the period October 1, 2000 to September 30, 2001 and increased leasing activity on towers that existed as of September 30, 2000. From the period October 1, 2000 to September 30, 2001, we acquired approximately 2,200 towers and constructed more than 1,500 towers. Additionally, during that same period, we added approximately 4,900 broadband equivalent tenants to both newly acquired/constructed and existing towers. The Company anticipates that the majority of lease up activity moving into the fourth quarter and into 2002 will continue to come from broadband type customers. This acquisition, construction and leasing activity has not only significantly increased revenue, but has also increased the scope, depth and strength of our national and international tower network, providing us with a much larger base of tower revenue for the nine months ended September 30, 2001 as compared to the nine months ended September 30, 2000. 16 Network Development Services Revenue Network development services revenue for the nine months ended September 30, 2001 was $325.7 million, an increase of $122.3 million from the nine months ended September 30, 2000. The growth in revenues during the nine months ended September 30, 2001 as compared to the nine months ended September 30, 2000 resulted primarily from strategic acquisitions and increased volume for services such as construction management, installation and related colocation services, and tower maintenance services. Satellite and Fiber Network Access Services Revenue Satellite and fiber network access services revenue for the nine months ended September 30, 2001 was $178.2 million, an increase of $82.5 million from the nine months ended September 30, 2000. The majority of the increase resulted from the consummation of several key acquisitions that occurred in 2001 and 2000 including: General Telecom, U.S. Electrodynamics, Publicom, Interpacket Networks and a SNAP facility in Switzerland. These acquisitions significantly increased our service capabilities, revenue base and geographical scope of customers, leading to significant incremental revenues in 2001. This increase in revenue was partially offset by the non-renewal of service contracts of several key customers and a decrease in demand for services in Latin America and from emerging telecommunications carriers. Rental and Management Expense Rental and management expense for the nine months ended September 30, 2001 was $155.7 million, an increase of $58.6 million from the nine months ended September 30, 2000. The majority of the increase resulted from incremental operating expenses incurred in the nine months ended September 30, 2001 for the more than 3,700 towers that were acquired or constructed from the period October 1, 2000 to September 30, 2001 as discussed above. The remaining increase reflects, to a lesser extent, increased bad debt expense for the segment as a whole and higher operating expenses related to towers that existed as of September 30, 2000. Network Development Services Expense Network development services expense for the nine months ended September 30, 2001 was $290.2 million, an increase of $117.1 million from the nine months ended September 30, 2000. The majority of the increase is due to incremental expenses related to the consummation of strategic acquisitions, overall increases in the volume of services work performed, increases in the overhead costs necessary to support both internal construction and external sales and, to a lesser extent, increased bad debt expense. Satellite and Fiber Network Access Services Expense Satellite and fiber network access services expense for the nine months ended September 30, 2001 was $169.5 million, an increase of $95.1 million from the nine months ended September 30, 2000. The majority of the increase is due to incremental expenses related to the consummation of the strategic acquisitions discussed above. Other components of the increase include increased personnel and infrastructure costs to help manage the growth of this segment, increased overhead related to the development and marketing of new product lines and, to a lesser extent, increased bad debt expense. Depreciation and Amortization Depreciation and amortization for the nine months ended September 30, 2001 was $317.9 million, an increase of $119.6 million from the nine months ended September 30, 2000. The principal component of the increase is an increase in depreciation expense of $71.3 million. This is primarily a result of the Company's purchase and acquisition of approximately $1.4 billion of property and equipment from the period October 1, 2000 to September 30, 2001. The other component of the increase is the increased amortization of $48.3 million, resulting from our recording and amortizing approximately $473.7 million of goodwill and other intangible assets related to acquisitions consummated from the period October 1, 2000 to September 30, 2001. Development Expense Development expense for the nine months ended September 30, 2001 was $7.0 million, a decrease of $3.5 million from the nine months ended September 30, 2000. The decrease resulted primarily from reduced 17 tower site inspection, data gathering costs and acquisition integration expenses incurred in the nine months ended September 30, 2001. Corporate General and Administrative Expense Corporate general and administrative expense for the nine months ended September 30, 2001 was $18.9 million, an increase of $8.9 million from the nine months ended September 30, 2000. The majority of the increase is a result of expenses incurred to implement a new company-wide ERP system, coupled with increased information technology and personnel costs related to supporting the Company's overall growth. Interest Expense Interest expense for the nine months ended September 30, 2001 was $210.2 million, an increase of $97.9 million from the nine months ended September 30, 2000. The majority of the increase, $84.2 million, resulted primarily from increased borrowings outstanding related to our credit facilities and senior notes, offset by a decrease in interest rates on our credit facilities. The remaining component of the increase represents interest on capital leases and other notes payable and additional deferred financing amortization. Interest Income and Other, net Interest income and other, net for the nine months ended September 30, 2001, was $13.6 million, an increase of $0.6 million from the nine months ended September 30, 2000. The increase resulted primarily from interest earned on invested cash on hand, offset by losses on equity investments and decreases in the fair value of derivative instruments not accounted for as hedges. Interest Income, TV Azteca, net Interest income, TV Azteca, net for the nine months ended September 30, 2001 was $10.7 million, an increase of $1.7 million from the nine months ended September 30, 2001. The increase results from interest earned on the entire principal amount of the note, $119.0 million, during the nine months ended September 30, 2001 as compared to less than the entire principal amount of the note outstanding for a portion of the nine months ended September 30, 2000. Loss on Investment in US Wireless During the nine months ended September 30, 2001, the Company wrote off its entire investment in US Wireless. The non-cash charge resulted from an assessment that a loss in value on its preferred stock investment had occurred that was other than temporary. Note Conversion Expense During the nine months ended September 30, 2001, the Company acquired a portion of its 2.25% convertible notes in exchange for shares of its Class A common stock. As a consequence of these negotiated exchanges with certain of its noteholders, the Company recorded a non-cash charge of $26.3 million. In a similar transaction during the nine-month period ended September 30, 2000, the Company acquired a portion of its 6.25% and 2.25% convertible notes in exchange for shares of its Class A common stock. As a result, the Company recorded a non-cash charge of $17.0 million during that period. These charges represent the fair value of incremental stock issued as an inducement to noteholders to convert their holdings prior to the first scheduled redemption date. Income Tax Benefit The income tax benefit for the nine months ended September 30, 2001 was $72.8 million, an increase of $29.8 million from the nine months ended September 30, 2000. The primary reason for the increase is a result of the increase in our loss before income taxes and extraordinary losses partially offset by an increase in amortization of non-deductible goodwill arising from stock acquisitions, non-deductible note conversion expense 18 and the valuation allowance related to our state net operating loss carryforwards. The effective tax rate differs in both periods from the statutory rate primarily due to the valuation allowance related to our state net operating loss carryforwards and the effect of non-deductible items, principally the amortization of intangible assets on certain stock acquisitions and non-deductible note conversion expense on which the Company has recorded no tax benefit. In assessing the realizability of the deferred tax asset, we analyzed our forecast of future taxable income and potential tax planning strategies and concluded that recoverability of the net deferred tax asset is more likely than not. Extraordinary Losses on Extinguishment of Debt, net The Company incurred extraordinary losses on the extinguishment of debt, net in the first quarter 2000 of $4.3 million. The losses were incurred as a result of an amendment and restatement of our primary credit facility ($3.0 million, net of a tax benefit of $2.0 million) and our early retirement of debt assumed as part of the UNISite, Inc. merger ($1.3 million, net of a tax benefit of $1.0 million). Restructuring On November 6, 2001, the Company announced a restructuring of the organization to include a reduction in the scope of its tower development activities and the centralization of certain operating functions. As a result of these initiatives, the Company expects to record a restructuring charge of approximately $41.0 million to $44.0 million. Approximately $9.0 million of the charge is associated with consolidating operations and employee reductions within all of the Company's business segments and includes employee separation costs and office closings. The Company expects to record this component of the charge in the fourth quarter of 2001 and in the first quarter of 2002. The remaining component of the restructuring charge, $32.0 million to $35.0 million, will be a non-cash write off of construction in progress related to project sites that will be abandoned as a result of the overall reduction in the Company's tower construction activity. The entire construction in progress charge will be recorded in the fourth quarter of 2001. Liquidity and Capital Resources Our liquidity needs arise from our acquisition-related activities, debt service, working capital needs, and capital expenditures associated principally with our tower construction program. As of September 30, 2001, we had approximately $338.3 million in cash and cash equivalents (including $62.2 million of restricted cash), working capital of approximately $436.3 million and approximately $330.0 million of borrowings available under our credit facilities after giving effect to covenants and ratio restrictions. Historically, we have met our operational liquidity needs primarily with internally generated funds and bank borrowings and have financed our acquisitions and our construction program with a combination of capital funds from sales of our equity and debt securities and bank borrowings. Through the remainder of 2001 and into 2002 we expect that operational liquidity needs will continue to be met as they have in the past. However, we expect that acquisition and construction programs which will be on a reduced scale from prior levels will be financed with available cash and bank borrowings. If funding through the equity and debt markets can be obtained on attractive terms, we would consider financing our acquisition and construction activity by such means. Our 2001 capital expenditures are expected to be approximately $575.0 million to $600.0 million ($442.0 million of which has already been incurred as of September 30, 2001). This includes towers to be built under existing build-to-suit agreements. In addition, as of September 30, 2001, we were subject to various agreements relating to acquisitions of assets (including ALLTEL) or businesses from various third parties that were pending. Based on these agreements, we expect to close $162.1 million in transactions during the fourth quarter of 2001 and the first quarter of 2002. Lastly, we believe that debt service requirements will be significant for the remainder of 2001 and into the forseeable future. We believe our current cash and cash equivalents (including restricted cash and investments) and anticipated borrowing capacity under our credit facilities will be sufficient to meet these cash requirements. 19 For the nine months ended September 30, 2001, cash flows used for operating activities were $21.0 million, as compared to cash flows used for operating activities of $37.8 million for the nine months ended September 30, 2000. The change is primarily related to a decreased investment in working capital. For the nine months ended September 30, 2001, cash flows used for investing activities were $1.2 billion, as compared to $1.6 billion for the nine months ended September 30, 2000. The decrease in 2001 is primarily due to a decrease in cash expended for mergers and acquisitions, offset by an increase in property and equipment expenditures. For the nine months ended September 30, 2001, cash flows provided by financing activities were $1.4 billion as compared to $1.8 billion for the nine months ended September 30, 2000. The decrease is primarily related to a reduction in the aggregate net cash inflows from bank borrowings and external debt and equity offerings. As of September 30, 2001, we had outstanding indebtedness of $3.5 billion, certain of which is described below under "Credit Facilities" and "Equity Offering and Note Placement". As of September 30, 2001, we had outstanding $212.7 million principal amount of our 6.25% convertible notes due October 15, 2009, $202.5 million principal amount of our 2.25% convertible notes due October 15, 2009, $450.0 million principal amount of our 5% convertible notes due February 1, 2010 and other debt of approximately $237.8 million. We may need to raise cash from external sources to meet our debt service obligations and to pay the principal amounts of our indebtedness when due. Credit Facilities. In October 2001, we amended our credit facilities to provide us with a borrowing capacity of up to $2.25 billion. Borrowings under the credit facilities are subject to certain covenant and ratio restrictions, relating to operating cash flow and tower construction cost levels. The credit facilities now include a $650.0 million credit facility which was fully available (subject to the covenant and ratio restrictions) as of September 30, 2001, maturing on June 30, 2007, an $850.0 million multi-draw Term Loan A, which was fully drawn as of September 30, 2001, maturing on June 30, 2007, a $500.0 million Term Loan B, which was fully drawn as of September 30, 2001 maturing on December 31, 2007 and a multi-draw $250.0 million Term Loan C, which was not available to the Company on September 30, 2001, but is fully available now (subject to covenant and ratio restrictions). The credit facilities are scheduled to amortize quarterly commencing in March 2003. Our credit facilities contain certain financial and operational covenants and other restrictions with which the borrower subsidiaries and restricted subsidiaries must comply, whether or not there are any borrowings outstanding. The parent company is also restricted with respect to indebtedness. We and the restricted subsidiaries have guaranteed all of the loans. We have secured the loans by liens on substantially all assets of the borrower subsidiaries and the restricted subsidiaries and substantially all outstanding capital stock and other debt and equity interests of all of our direct and indirect subsidiaries. Under our credit facilities, we are also required to maintain interest reserves for our convertible notes and our senior notes. These funds can only be used to make scheduled interest payments on our outstanding convertible notes and senior notes. As of September 30, 2001 we had approximately $62.2 million of restricted cash and investments related to such interest reserves. In February 2001, our Mexican subsidiary, American Tower Corporation de Mexico, S. de R.L. de C.V., which we refer to as ATC Mexico, and two of its subsidiaries consummated a loan agreement with a group of banks providing a credit facility of an initial aggregate amount of $95.0 million. If additional lenders are made party to the agreement, the size of the facility may increase to $140.0 million. We have committed to ATC Mexico to loan up to $45.0 million if additional lenders are not made party to the agreement. Our commitment will be reduced on a dollar-for-dollar basis if additional lenders join the ATC Mexico loan agreement. This loan agreement requires maintenance of various financial covenants and ratios and is guaranteed and collateralized by substantially all of the assets of ATC Mexico and the assets of its subsidiaries. All amounts borrowed under the loan agreement are due on September 30, 2003. The lenders' commitment to make loans under the loan agreement expires on March 31, 2002. As of September 30, 2001, an aggregate of $95.0 million was outstanding under the loan agreement. 20 Equity Offering and Note Placement. In January 2001, we completed a public offering of 10.0 million shares of our Class A common stock for total net proceeds of approximately $360.8 million. We also completed a private placement of $1.0 billion of senior notes that mature in February 2009 for total net proceeds of $969.0 million. These notes require semiannual interest payments and contain certain financial and operational covenants and other restrictions similar to those in our credit facilities. We have used and will use the proceeds from these two transactions to finance the construction of towers, fund pending and future acquisitions and for general corporate purposes. Convertible Note Exchanges. In the third quarter of 2001, the Company acquired a portion of its outstanding convertible notes. During this period, approximately $82.5 million in face amount ($61.6 million carrying amount) of the Company's 2.25% convertible notes was converted into shares of Class A common stock. All of these conversions were pursuant to exchange agreements which the Company negotiated with a limited number of noteholders. Pursuant to these exchange agreements, the Company has issued an aggregate of 2.4 million shares of Class A common stock that these noteholders were entitled to receive based on the conversion price set forth in the applicable indenture, plus an additional 1.5 million shares of Class A common stock to induce them to convert their holdings prior to the first scheduled redemption date. As a result of these transactions, in the third quarter of 2001 the Company recorded a non-cash charge of $26.3 million, which represents the fair market value of the inducement shares. The Company may negotiate similar exchanges for its outstanding convertible notes during the fourth quarter of 2001 and from time to time in the future, subject to market conditions. To the extent that inducement shares are issued by the Company as part of any future exchanges, the Company expects to record additional non-cash charges. ATC Separation--We continue to be obligated under the ATC Separation agreement for certain tax liabilities to CBS Corporation and American Radio Systems. As of September 30, 2001 no material matters covered under this indemnification have been brought to our attention. Acquisitions and Construction. In the fourth quarter of 2001, the Company announced an initiative to reduce the scope of our tower development activities. This reduction will result in a significant decrease in new tower construction in the near term and in a more selective criteria in evaluating future development and acquisitions. The intention of this initiative is twofold: to accelerate our overall return on investment and to preserve capital. We continue to believe that our consummated acquisitions and current and future construction activities will have a material impact on liquidity. We believe that the acquisitions, once integrated, will have a favorable impact on liquidity and will offset the initial effects of the funding requirements. We also believe that the construction activities may initially have an adverse effect on our future liquidity as newly constructed towers will initially decrease overall liquidity. However, as such sites become fully operational and achieve higher utilization, we expect that they will generate tower cash flow and, in the long-term, increase liquidity. As of September 30, 2001, we were a party to various agreements relating to the acquisition of assets or businesses from various third parties and were involved in the construction of numerous towers, pursuant to build-to-suit agreements and for other purposes (see note 4 of the condensed consolidated financial statements). Economic Conditions. The slow down in the economy could reduce consumer demand for wireless services or negatively impact the availability of debt and equity capital, thereby causing providers to delay or abandon implementation of new systems and technologies. We believe that the economic slow down in 2001 has harmed, and may continue to harm, the financial condition of some wireless service providers, certain of which, including customers of ours, have filed for bankruptcy. Recent Accounting Pronouncements--On January 1, 2001, the Company adopted the provisions of SFAS No. 133 "Accounting for Derivative Instruments and Hedging Activities". This statement establishes accounting and reporting standards for derivative instruments. Specifically, it requires that an entity recognize all derivatives as either assets or liabilities on the balance sheet at fair value. The accounting for changes in the fair market value of a derivative (that is unrealized gains or losses) is recorded as a component of an entity's net income or other comprehensive income, depending upon designation (as defined in the statement). Such adoption resulted in a charge to other comprehensive income of $7.9 million, net of tax, from the cumulative effect of adopting this standard. 21 The Company is exposed to interest rate risk relating to variable interest rates on its credit facilities. As part of its overall strategy to manage the level of exposure to the risk of interest rate fluctuations, the Company uses interest rate swaps, caps and collars, which qualify and are designated as cash flow hedges. The Company also uses swaptions to manage interest rate risk, which have not been designated as cash flow hedges. During the nine months ended September 30, 2001, the Company recorded an unrealized loss, excluding the charge for the cumulative effect of adopting SFAS No. 133, of approximately $21.1 million (net of a tax benefit of approximately $11.4 million) in other comprehensive loss for the change in fair value of cash flow hedges and reclassified $6.1 million (net of a tax benefit of approximately $3.3 million) into results of operations. Hedge ineffectiveness resulted in a gain of approximately $1.6 million for the nine months ended September 30, 2001 and was recorded in "interest income and other, net". The Company records the changes in fair value of its derivative instruments that are not accounted for as hedges in "interest income and other, net". At September 30, 2001 the fair value of the Company's derivative instruments represented a liability of approximately $39.8 million and is included in "other long-term liabilities". The Company estimates that approximately $16.5 million of derivative losses (net of tax benefit) included in other comprehensive loss will be reclassified into the statement of operations within the next twelve months. In June 2001, SFAS No. 141, "Business Combinations" was approved by the Financial Accounting Standards Board (FASB). SFAS No. 141 requires that the purchase method of accounting be used for all business combinations initiated after June 30, 2001. Goodwill and certain intangible assets will remain on the balance sheet and not be amortized. On an annual basis, and when there is reason to suspect that their values have been diminished or impaired, these assets must be tested for impairment, and write-downs may be necessary. The Company has not determined the impact that this statement will have on its consolidated financial position or results of operations. In June 2001, SFAS No. 142, "Goodwill and Other Intangible Assets" was approved by the FASB. SFAS No. 142 changes the accounting for goodwill and certain other intangibles from an amortization method to an impairment-only approach. Amortization of goodwill and certain other intangibles will cease upon adoption of this statement. The Company is required to implement SFAS No. 142 on January 1, 2002 and it has not determined the impact that this statement will have on its consolidated financial position or results of operations. Factors That May Affect Future Results We operate in a rapidly changing environment that involves a number of risks, some of which are beyond our control. The following discussion highlights some of the risks that may affect future operating results. DECREASE IN DEMAND FOR TOWER SPACE WOULD MATERIALLY AND ADVERSELY AFFECT OUR OPERATING RESULTS AND WE CANNOT CONTROL THAT DEMAND Many of the factors affecting the demand for tower space, and to a lesser extent our services business, affect our operating results. Those factors include: . consumer demand for wireless services; . the financial condition of wireless service providers and their preference for owning rather than leasing antenna sites; . the growth rate of wireless communications or of a particular wireless segment; . the number of wireless service providers in a particular segment, nationally or locally. This number could be affected by the easing of spectrum limitation restrictions by the FCC; . governmental licensing of broadcast rights; . increased use of roaming and resale arrangements by wireless service providers. These arrangements enable a provider to serve customers outside its license area, to give licensed providers the right to enter into arrangements to serve overlapping license areas and to permit nonlicensed providers to enter the wireless marketplace. Wireless service providers might consider such roaming and resale arrangements as superior to constructing their own facilities or leasing antenna space from us; 22 . zoning, environmental and other government regulations; . any new legislation, or interpretation of existing federal communications laws, that would give wireless service providers the right to place their antennae on public utility poles and other structures at regulated rates; and . technological changes. The demand for antenna space is dependent, to a significantly lesser extent, on the needs of television and radio broadcasters. Among other things, technological advances, including the development of satellite-delivered radio, may reduce the need for tower-based broadcast transmission. We could also be affected adversely should the development of digital television be delayed or impaired, or if demand for it were to be less than anticipated because of delays, disappointing technical performance or cost to the consumer. CONTINUATION OF THE CURRENT U.S. ECONOMIC SLOW DOWN COULD MATERIALLY AND ADVERSELY AFFECT OUR BUSINESS The significant general slow down in the U.S. economy has negatively affected the factors described in the prior heading, influencing demand for tower space and tower related services. For example, this slow down could reduce consumer demand for wireless services, or negatively impact the debt and equity markets, thereby causing providers to delay or abandon implementation of new systems and technologies. We believe that the economic slow down in 2001 has already harmed, and may continue to harm, the financial condition of some wireless service providers, certain of which, including customers of ours, have filed for bankruptcy. OUR SUBSTANTIAL LEVERAGE AND DEBT SERVICE OBLIGATIONS MAY ADVERSELY AFFECT OUR CASH FLOW AND OUR ABILITY TO MAKE PAYMENTS ON OUR INDEBTEDNESS As of September 30, 2001, we had outstanding $3.5 billion of consolidated debt. Our substantial level of indebtedness increases the possibility that we may be unable to generate cash sufficient to pay when due the principal of, interest on or other amounts due in respect of our indebtedness. We may also obtain additional long-term debt and working capital lines of credit to meet future financing needs, primarily for our reduced but nevertheless significant construction program. This would have the effect of increasing our total leverage. Our substantial leverage could have significant negative consequences, including: . increasing our vulnerability to general adverse economic and industry conditions; . limiting our ability to obtain additional financing; . requiring the dedication of a substantial portion of our cash flow from operations to service our indebtedness, thereby reducing the amount of our cash flow available for other purposes, including capital expenditures; . requiring us to sell debt or equity securities or to sell some of our core assets, possibly on unfavorable terms, to meet payment obligations; . limiting our flexibility in planning for, or reacting to, changes in our business and the industries in which we compete; and . placing us at a possible competitive disadvantage with less leveraged competitors and competitors that may have better access to capital resources. A significant portion of our outstanding indebtedness bears interest at floating rates. As a result, our interest payment obligations on such indebtedness will increase if interest rates increase. RESTRICTIVE COVENANTS IN OUR DOMESTIC CREDIT FACILITIES AND OUR SENIOR NOTES COULD ADVERSELY AFFECT OUR BUSINESS BY LIMITING FLEXIBILITY The indenture for our senior notes and our domestic credit facilities contain restrictive covenants that limit our ability to borrow funds and to take various other actions and engage in various types of transactions. These restrictions include: . paying dividends and making distributions or other restricted payments; . incurring more debt, guaranteeing indebtedness and issuing preferred stock; 23 . issuing stock of some types of subsidiaries; . making specified types of investments; . creating liens; . entering into transactions with affiliates; . entering into sale-leaseback transactions; and . merging, consolidating or selling assets. These covenants could have an adverse effect on our business by limiting our ability to take advantage of financing, merger and acquisition or other corporate opportunities. In particular, if our debt covenants restricted our ability to borrow additional funds we might be required to curtail our construction activities with adverse consequences. See "If we are unable to construct or acquire new towers at the pace, in the locations and at the costs we desire, our business would be adversely affected" below. BUILD-TO-SUIT CONSTRUCTION PROJECTS AND MAJOR ACQUISITIONS FROM WIRELESS SERVICE PROVIDERS INCREASE OUR DEPENDENCE ON A LIMITED NUMBER OF CUSTOMERS, THE LOSS OF WHICH COULD MATERIALLY DECREASE REVENUES, AND MAY ALSO INVOLVE LESS FAVORABLE TERMS Our focus on major build-to-suit projects for wireless service providers and related acquisitions entail several unique risks. First is our greater dependence on a limited number of customers and the risk that customer However, we must continue to satisfy financial ratios and to comply with financial and other covenants in order to do so. If our revenues and cash flow do not meet expectations, losses could materially decrease revenues. Another risk is that our agreements with these wireless service providers have lease and control terms that are more favorable to them than the terms we give our tenants generally. In addition, although we have the benefit of an anchor tenant in build-to-suit projects, we may not be able to find a sufficient number of additional tenants. In fact, one reason wireless service providers may prefer build-to-suit arrangements is to share or escape the costs of an undesirable site. A site may be undesirable because it has high construction costs or may be considered a poor location by other providers. OUR CONSTRUCTION PROGRAM INCREASES OUR EXPOSURE TO RISKS THAT COULD INCREASE COSTS AND ADVERSELY AFFECT OUR EARNINGS AND GROWTH Our construction activities involve substantial risks. These risks include: . increasing our debt and the amount of payments required on it; . increasing competition for construction sites and experienced tower construction companies, resulting in significantly higher costs and failure to meet time schedules; . failing to meet time schedules, which could result in our paying significant penalties to prospective tenants, particularly in build-to- suit situations; and . possible lack of sufficient experienced personnel to manage an expanded construction program. IF WE ARE UNABLE TO CONSTRUCT OR ACQUIRE NEW TOWERS AT THE PACE, IN THE LOCATIONS AND AT THE COSTS WE DESIRE, OUR BUSINESS WOULD BE ADVERSELY AFFECTED Our growth strategy depends in part on our ability to construct and acquire towers in locations and on a time schedule that meets the requirements of our customers. If our tower construction and acquisition projects fail to meet the requirements of our customers, or fail to meet their requirements at our projected costs, our business would be adversely affected. If we are unable to build new towers where and when our customers require them, or where and when we believe the best opportunity to add tenants exists, we could fail to meet our contractual obligations under build-to-suit agreements, thereby incurring substantial penalties and possibly contract terminations. In addition, we could lose opportunities to lease space on our towers. Our ability to construct a tower at a location, on a schedule, and at a cost we project can be affected by a number of factors beyond our control, including: . zoning, and local permitting requirements and national regulatory approvals; . environmental opposition; 24 . availability of skilled construction personnel and construction equipment; . adverse weather conditions; and . increased competition for tower sites, construction materials and labor. INCREASING COMPETITION IN THE SATELLITE AND FIBER NETWORK ACCESS SERVICES MARKET MAY SLOW vERESTAR'S GROWTH AND ADVERSELY AFFECT ITS BUSINESS In the satellite and fiber network access services market, Verestar competes with other satellite communications companies that provide similar services, as well as other communications service providers. Some of Verestar's existing and potential competitors consist of companies from whom Verestar currently leases satellite and fiber network access in connection with the provision of Verestar's services to its customers. Increased competition could result in Verestar being forced to reduce the fees it charges for its services and may limit Verestar's ability to obtain, on economical terms, services that are critical to its business. We anticipate that Verestar's competitors may develop or acquire services that provide functionality that is similar to that provided by Verestar's services and that those competitive services may be offered at significantly lower prices or bundled with other services. Many of the existing and potential competitors have financial and other resources significantly greater than those available to Verestar. IF WE CANNOT SUCCESSFULLY INTEGRATE ACQUIRED SITES OR BUSINESSES OR MANAGE OUR OPERATIONS AS WE GROW, OUR BUSINESS WILL BE ADVERSELY AFFECTED AND OUR GROWTH MAY SLOW OR STOP A significant part of our growth strategy is the continued pursuit of strategic acquisitions of independent tower operators and consolidators, wireless service providers and service and teleport businesses. We cannot assure you, however, that we will be able to integrate successfully acquired businesses and assets into our existing business. Our growth has placed, and will continue to place, a significant strain on our management and our operating and financial systems. Successful integration of these and any future acquisitions will depend primarily on our ability to manage these assets and combined operations and, with respect to the services and satellite and fiber network access services businesses, to integrate new management and employees into our existing operations. IF OUR CHIEF EXECUTIVE OFFICER LEFT, WE WOULD BE ADVERSELY AFFECTED BECAUSE WE RELY ON HIS REPUTATION AND EXPERTISE, AND BECAUSE OF OUR RELATIVELY SMALL SENIOR MANAGEMENT TEAM The loss of our chief executive officer, Steven B. Dodge, has a greater likelihood of having a material adverse effect upon us than it would on most other companies of our size because of our comparatively smaller executive group and our reliance on Mr. Dodge's expertise. Our growth strategy is highly dependent on the efforts of Mr. Dodge. Our ability to raise capital also depends significantly on the reputation of Mr. Dodge. You should be aware that we have not entered into an employment agreement with Mr. Dodge. The tower industry is relatively new and does not have a large group of seasoned executives from which we could recruit a replacement for Mr. Dodge. EXPANDING OPERATIONS INTO FOREIGN COUNTRIES COULD CREATE EXPROPRIATION, GOVERNMENTAL REGULATION, FUNDS INACCESSIBILITY, FOREIGN EXCHANGE EXPOSURE AND MANAGEMENT PROBLEMS Our expansion into Mexico and Brazil, and other possible foreign operations in the future, could result in adverse financial consequences and operational problems not experienced in the United States. We have made a substantial loan to a Mexican company and have acquired and are constructing a sizable number of towers in that country. We also acquired the rights to 156 communications towers in Brazil and entered into a build-to-suit agreement for an additional 400 towers in that country. As a result of acquisitions by Verestar, we have network operation centers in Europe, Asia, South America and Africa. We may also engage in comparable transactions in other countries in the future. Among the risks of foreign operations are governmental expropriation and regulation, inability to repatriate earnings or other funds, currency fluctuations, difficulty in recruiting trained personnel, and language and cultural differences, all of which could adversely affect these operations. 25 NEW TECHNOLOGIES COULD MAKE OUR TOWER ANTENNA LEASING SERVICES LESS DESIRABLE TO POTENTIAL TENANTS AND RESULT IN DECREASING REVENUES The development and implementation of signal combining technologies, which permit one antenna to service two different transmission frequencies and, thereby, two customers, may reduce the need for tower-based broadcast transmission and hence demand for our antenna space. Mobile satellite systems and other new technologies could compete with land- based wireless communications systems, thereby reducing the demand for tower lease space and other services we provide. The Federal Communications Commission has granted license applications for several low-earth orbiting satellite systems that are intended to provide mobile voice or data services. In addition, the emergence of new technologies could reduce the need for tower-based transmission and reception and have an adverse effect on our operations. The growth in delivery of video services by direct broadcast satellites could also adversely affect demand for our antenna space. WE COULD HAVE LIABILITY UNDER ENVIRONMENTAL LAWS As the owner, lessee and operator of real property and facilities, we are subject to federal, state and local and foreign environmental laws relating to the management, use, storage, disposal, emission and remediation of, and exposure to, hazardous and non-hazardous substances, materials and waste. We are also subject to related registration, permitting, record keeping and financial assurance requirements. See "Legal Proceedings" for a description of a civil complaint filed against us by the District Attorney for the County of Santa Clara, California regarding certain alleged recordkeeping, registration, hazardous materials management and filing violations under California environmental laws. Various environmental laws require us to investigate, remove or remediate soil and groundwater contaminated by hazardous substances or wastes on property we own or lease or which is associated with tower operations, and may subject us to penalties and fines for violations of those environmental laws. Some of those laws impose cleanup responsibility and liability without regard to whether the owner, lessee or operator of the property or facility knew of or was responsible for the contamination, or whether operations at the property have been discontinued or the property has been transferred. The owner, lessee or operator of contaminated property also may be subject to common law claims by third parties based on damages and costs resulting from off-site migration of the contamination. In connection with our former and current ownership, lease or operation of our properties, we may be liable for those types of environmental costs. Fines or penalties resulting from any failure to comply with those environmental laws and addressing claims or obligations arising under them could have a material adverse effect on our financial condition, results of operations and liquidity. OUR BUSINESS IS SUBJECT TO GOVERNMENT REGULATIONS AND CHANGES IN CURRENT OR FUTURE LAWS OR REGULATIONS COULD HARM OUR BUSINESS We are subject to federal, state and local and foreign regulation of our business. Both the FCC and the FAA regulate towers used for wireless communications and radio and television antennae. In addition, the FCC separately licenses and regulates wireless communication devices and television and radio stations operating from towers. Similar regulations exist in Mexico and other foreign jurisdictions regarding wireless communications and the operation of communications towers. As previously disclosed, we entered into a Consent Decree with the FCC in August 2001 which requires us to maintain an approved compliance program for 3 years. Failure to comply with these applicable regulatory requirements and the terms of the Consent Decree may lead to monetary penalties and other sanctions, including being disqualified from holding licenses for our Verestar business or registrations for our towers and may require us to indemnify our customers against any such failure to comply. New regulations may impose additional costly burdens on us, which may affect our revenues and cause delays in our growth. 26 OUR COSTS COULD INCREASE AND OUR REVENUES COULD DECREASE DUE TO PERCEIVED HEALTH RISKS FROM RADIO EMISSIONS, ESPECIALLY IF THESE PERCEIVED RISKS ARE SUBSTANTIATED Public perception of possible health risks associated with cellular and other wireless communications media could slow the growth of wireless companies, which could in turn slow our growth. In particular, negative public perception of, and regulations regarding, these perceived health risks could slow the market acceptance of wireless communications services. If a connection between radio emissions and possible negative health effects, including cancer, were established, our operations, costs and revenues would be materially and adversely affected. We do not maintain any significant insurance with respect to these matters. 27 Information Presented Pursuant to the Indenture for the Senior Notes The following table sets forth information that is presented solely to address certain reporting requirements contained in the indenture for our Senior Notes. This information presents certain financial data for us on a consolidated basis and on a restricted group basis, which means only for the Company and its subsidiaries that comprise the restricted group under the indenture. All of our subsidiaries are part of this restricted group, except Verestar and its subsidiaries, whose operations constitute all of our satellite and fiber network access services business segment. This restricted group data is not intended to represent an alternative measure of operating results, financial position or cash flow from operations, as determined in accordance with generally accepted accounting principles.
Three months ended Nine months ended September 30, 2001 September 30, 2001 ----------------------- ----------------------- Restricted Restricted Consolidated Group (1) Consolidated Group(1) ------------ ---------- ------------ ---------- Statement of Operations Data (in thousands): Operating revenues........... $ 296,196 $ 238,794 $ 821,632 $ 643,441 --------- --------- --------- --------- Operating expenses: Operating expenses excluding depreciation and amortization, and development and corporate general and administrative expenses.................... 219,567 164,214 615,399 445,932 Depreciation and amortization................ 118,898 100,296 317,853 267,327 Development expense.......... 1,736 1,701 7,038 6,303 Corporate general and administrative expense...... 7,353 7,353 18,887 18,887 --------- --------- --------- --------- Total operating expenses... 347,554 273,564 959,177 738,449 --------- --------- --------- --------- Loss from operations......... (51,358) (34,770) (137,545) (95,008) Interest expense............. (73,483) (70,543) (210,223) (202,014) Interest income and other, net......................... 720 4,331 13,578 17,339 Interest income, TV Azteca, net of interest expense of $289 and $873 for the three and nine months ended September 30, 2001, respectively................ 3,627 3,627 10,747 10,747 Loss on investment in US Wireless.................... (1,182) (1,182) (23,408) (23,408) Note conversion expense...... (26,336) (26,336) (26,336) (26,336) Minority interest in net earnings of subsidiaries.... (19) (19) (16) (16) --------- --------- --------- --------- Loss before income taxes and extraordinary losses........ $(148,031) $(124,892) $(373,203) $(318,696) ========= ========= ========= =========
September 30, 2001 ----------------------------- Consolidated Restricted Group ------------ ---------------- Balance Sheet Data (in thousands): Cash and cash equivalents....................... $ 276,094 $ 264,311 Restricted cash and investments................. 62,225 62,225 Property and equipment, net..................... 3,177,651 2,884,786 Total assets.................................... 6,918,509 6,286,804 Long-term obligations, including current portion........................................ 3,548,187 3,431,700 Net debt(2)..................................... 3,209,868 3,105,164 Total stockholders' equity...................... 3,016,023 3,016,023
- -------- (1) Corporate overhead allocable to Verestar and interest expense related to intercompany borrowings by Verestar (unrestricted subsidiary) have not been excluded from results shown for the restricted group. (2) Net debt represents long-term obligations, including current portion, less cash and cash equivalents and restricted cash and investments. 28 Tower Cash Flow, Adjusted Consolidated Cash Flow and Non-Tower Cash Flow for the Company and its restricted subsidiaries, as defined in the indenture for our senior notes, are as follows: Tower Cash Flow, for the three months ended September 30, 2001..... $ 65,054 ========= Consolidated Cash Flow, for the twelve months ended September 30, 2001.............................................................. $ 255,568 Less: Tower Cash Flow, for the twelve months ended September 30, 2001............................................................ (219,905) Plus: four times Tower Cash Flow, for the three months ended September 30, 2001.............................................. 260,216 --------- Adjusted Consolidated Cash Flow, for the twelve months ended September 30, 2001................................................ $ 295,879 ========= Non-Tower Cash Flow, for the twelve months ended September 30, 2001.............................................................. $ 25,342 =========
29 ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK We are exposed to market risk from changes in interest rates on our long- term debt obligations. We attempt to reduce these risks by utilizing derivative financial instruments, namely interest rate caps, swaps, collars and swaptions pursuant to our policies. All derivative financial instruments are for purposes other than trading. For the nine months ended September 30, 2001, we increased our borrowings under our credit facilities by approximately $95.0 million. In addition, we completed a private placement of $1.0 billion of our senior notes issued at 100% of their face amount. The proceeds from the above have and will be used to finance construction and acquisitions. In the short-term, we invested any unused proceeds in marketable debt securities, commercial paper and cash and cash equivalents. In June 2001 we entered into an interest rate collar agreement with a total notional amount of $47.5 million expiring in June 2003. Lastly, in August 2001 the Company acquired an aggregate of $82.5 million face amount ($61.6 million carrying amount) of its 2.25% convertible notes for shares of its Class A common stock. The following table provides information as of September 30, 2001 about our market risk exposure associated with changing interest rates. For long-term debt obligations, the table presents principal cash flows and related average interest rates by contractual maturity dates. For interest rate caps, swaps, collars and swaptions, the table presents notional principal amounts and weighted-average interest rates by contractual maturity dates. Twelve Month Period Ended September 30, Principal Payments and Interest Rate Detail by Contractual Maturity Dates (in thousands)
Long-Term Debt 2002 2003 2004 2005 2006 Thereafter Total Fair Value - -------------- ---------- ---------- -------- -------- -------- ---------- ---------- ---------- Fixed Rate Debt(a)...... $ $ $ $ $ $1,865,211 $1,865,211 $1,493,128 Average Interest Rate(a)................ 7.62% Variable Rate Debt(a)... $ $ 137,000 $158,000 $230,250 $252,563 $ 667,187 $1,445,000 $1,445,000 Aggregate Notional Amounts Associated with Interest Rate Caps, Swaps, Collars and Swaptions in Place during the Twelve Month Period Ended September 30, and Interest Rate Detail by Contractual Maturity Dates (in thousands) Interest Rate CAPS - ------------------ Notional Amount......... $364.980(c) Cap Rate................ 9.00% Interest Rate SWAPS - ------------------- Notional Amount......... $395,000(d) $365,000(e) $ (20,427) Weighted- Average Fixed Rate Payable(b)............. 6.69% 6.67% Interest Rate COLLARS - --------------------- Notional Amount......... $512,500(f) $232,500(g) $ (19,404) Weighted- Average Below Floor Rate Payable, Above Cap Rate Receivable(b)..... 6.14%-8.54% 5.51%-7.62%
- -------- (a) September 30, 2001 variable rate debt consists of our domestic and Mexican credit facilities ($1.45 billion) and fixed rate debt consists of the 2.25% and 6.25% convertible notes ($415.2 million), the 5.0% convertible notes ($450.0 million) and the senior notes ($1.0 billion). Interest on the credit facilities is payable in accordance with the applicable London Interbank Offering Rate (LIBOR) agreement or quarterly and accrues at our option either at LIBOR plus margin (as defined) or the Base Rate plus margin (as defined). The average interest rate in effect at September 30, 2001 for the credit facilities was 6.54%. For the nine months ended September 30, 2001, the weighted average interest rate under the credit facilities was 7.91%. The 2.25% and 6.25% convertible notes each bear interest (after giving effect to the accretion of the original discount on the 2.25% convertible notes) at 6.25%. Interest on the 2.25% and 6.25% notes is payable semiannually on April 15 and October 15 of each year. The 5.0% convertible notes bear interest at 5.0% which is payable semiannually on February 15 and August 15 of each year. The senior notes bear interest at 9 3/8% which is payable semiannually on February 1 and August 1 of each year beginning August 1, 2001. (b) Represents the weighted-average fixed range of interest based on contract notional amount as a percentage of total notional amounts in a given year. (c) Includes notional amounts of $364,980 that will expire in February 2002. (d) Includes notional amounts of $30,000 that will expire in March 2002. (e) Includes notional amounts of $75,000 and $290,000 that will expire in January and February 2003, respectively. (f) Includes notional amounts of $185,000 and $95,000 that will expire in May and July 2002, respectively. (g) Includes notional amounts of $185,000 and $47,500 that will expire in May and June 2003, respectively. 30 As discussed above, we maintain a portion of our cash and cash equivalents and short-term investments in financial instruments that are subject to interest rate risks. Due to the relatively short duration of such instruments, fluctuations in interest rates should not materially affect our financial condition or results of operations. The effect of foreign currency fluctuations on our foreign operations, which primarily include Mexico and Brazil, have not been significant to date. This has been the case in Mexico primarily because most contracts are denominated in U.S. dollars, and in Brazil because we are in the early stages of developing our network. Accordingly, foreign currency risk has not been material for the nine months ended September 30, 2001. 31 PART II. OTHER INFORMATION ITEM 1. LEGAL PROCEEDINGS As previously disclosed by the Company in its Quarterly Report on Form 10-Q for the quarter ended March 31, 2001, on April 23, 2001 the District Attorney for the County of Santa Clara, California filed a civil complaint against the Company in the Superior Court of California. The complaint alleges record keeping, registration, hazardous materials management and filing violations under California environmental laws. The complaint does not allege any contamination of the environment occurred as a result of the alleged violations. The Company has taken measures to ensure that these sites are in compliance with applicable California environmental laws and believes that they are currently in compliance with such laws. On May 23, 2001, the Company filed an answer to the complaint formally denying the allegations. The Company believes that the resolution of the violations alleged in the complaint will not have a material adverse effect on its financial conditions or results of operations. ITEM 2. CHANGES IN SECURITIES AND USE OF PROCEEDS In the third quarter of 2001, the Company entered into exchange agreements with a limited number of holders of the Company's 2.25% convertible notes due 2009 (the "2.25% Notes"). Pursuant to the exchange agreements, the noteholders exchanged an aggregate of $82.5 million face amount of the Company's 2.25% Notes for an aggregate of 3,962,537 shares of the Company's Class A common stock in reliance upon the exemption from registration set forth in Section 3(a)(9) of the Securities Act. No underwriters were engaged in connection with such issuances. On October 4, 2001, the Company consummated an acquisition pursuant to which the Company issued an aggregate of 35,325 shares of Class A Common Stock as consideration for the acquisition. The Company issued these shares in reliance on the exemption from registration provided by Section 4(2) of the Securities Act of 1933. As a basis for doing so, the Company relied on the following facts: (1) the Company offered the securities to a limited number of offerees without any general solicitation, (2) the Company obtained representations from the purchasers regarding their financial suitability and investment intent, and (3) the Company issued all of the securities with restrictive legends on the certificates to limit resales. ITEM 5. OTHER INFORMATION The following information updates the status of the ALLTEL transaction as previously disclosed by us in Current Reports on Form 8-K filed on December 20, 2000, April 17, 2001, June 11, 2001, July 9, 2001, September 14, 2001 and October 4, 2001 and in Quarterly Reports on Form 10-Q filed by us on May 15, 2001 and August 14, 2001. On November 2, 2001, we closed on the sublease of 149 towers pursuant to our agreement with ALLTEL. These towers were used by ALLTEL primarily in connection with its business of providing consumer wireless services. We plan to lease space on the towers to third parties. In connection with this closing, we paid consideration of approximately $44.7 million in cash. The amount of consideration and the terms of the agreement were based upon arms- length negotiations between unaffiliated parties. There are no material relationships between us and ALLTEL or any of its respective affiliates, officers or directors. We financed the transaction through available cash-on- hand, including proceeds from our January 2001 equity and debt financings. For more information about our agreement with ALLTEL, see our Current Reports on Form 8-K filed on December 20, 2000, April 17, 2001, June 11, 2001, July 9, 2001, September 14, 2001 and October 4, 2001; our Quarterly Reports on Form 10-Q filed May 15, 2001 and August 14, 2001; note 4 to the condensed consolidated financial statements set forth herein; and the exhibits incorporated by reference into this Quarterly Report on Form 10-Q. ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K (a) Exhibits. Listed below are the exhibits which are filed as part of this Form 10-Q (according to the number assigned to them in Item 601 of Regulation S-K). 32
Exhibit No. Description of Exhibit ----------- ---------------------- 10.1 Amended and Restated Registration Rights Agreement, dated as of February 25, 1999, by and among American Tower Corporation and each of the Parties named therein. 10.2 Amended and Restated Loan Agreement dated as of January 6, 2000, by and among American Tower, L.P., American Towers, Inc. and ATC Teleports, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.1 from the Registrant's Current Report on Form 8-K (File No. 001-14195) filed on January 28, 2000). 10.3 First Amendment and Waiver Agreement, dated as of February 9, 2000, by and among American Tower, L.P., American Towers, Inc. and ATC Teleports, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.1 from the Registrant's Quarterly Report on Form 10-Q (File No. 001-14195) filed on November 13, 2000). 10.4 Second Amendment to Amended and Restated Loan Agreement, dated as of May 11, 2000, by and among American Tower, L.P., American Towers, Inc. and ATC Teleports, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.2 from the Registrant's Quarterly Report on Form 10-Q (File No. 001- 14195) filed on November 13, 2000). 10.5 Waiver and Third Amendment to Amended and Restated Loan Agreement, dated as of October 13, 2000, by and among American Tower, L.P., American Towers, Inc. and ATC Teleports, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.3 from the Registrant's Quarterly Report on Form 10-Q (File No. 001- 14195) filed on November 13, 2000). 10.6 Fourth Amendment to Amended and Restated Loan Agreement, dated as of January 23, 2000, by and among American Tower, L.P., American Towers, Inc. and Verestar, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.5 from the Registrants' Registration Statement on Form S-4 (File No. 333-59852)). 10.7 Fifth Amendment and Waiver to Amended and Restated Loan Agreement, dated as of March 26, 2001, by and among American Tower, L.P., American Towers, Inc. and Verestar, Inc., as Borrowers, and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto (incorporated by reference to Exhibit 10.6 from the Registrants' Registration Statement on Form S-4 (File No. 333-59852)). 10.8 Sixth Amendment to Amended and Restated Loan Agreement, dated as of October 26, 2001, by and among American Tower, L.P., American Towers, Inc., Verestar, Inc., and Towersites Monitoring, Inc., as Borrowers and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto. 10.9 Notice of Incremental Facility Commitment, dated as of October 26, 2001, by and among American Towers, Inc., American Tower, L.P., Verestar, Inc., Towersites Monitoring, Inc., and American Tower International, Inc., as Borrowers and Toronto Dominion (Texas) Inc., as Administrative Agent, and the banks party thereto.
(b) Reports on Form 8-K. During the quarter ended September 30, 2001, the Registrant filed with the Commission the following Current Reports on Form 8-K: 1.Form 8-K (Item 2) filed on July 9, 2001. 2.Form 8-K (Item 9) filed on September 6, 2001. 3.Form 8-K (Item 2) filed on September 14, 2001. 33 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. American Tower Corporation By: /s/ Joseph L. Winn Date: November 14, 2001 ---------------------------------- Joseph L. Winn Chief Financial Officer and Treasurer (Duly Authorized Officer) Date: November 14, 2001 By: /s/ Justin D. Benincasa ---------------------------------- Justin D. Benincasa Senior Vice President and Corporate Controller (Duly Authorized Officer) 34


                                                                    Exhibit 10.1

                             AMENDED AND RESTATED

                         REGISTRATION RIGHTS AGREEMENT

                                     AMONG

                          AMERICAN TOWER CORPORATION

                                      and

                         THE STOCKHOLDERS NAMED HEREIN



                               February 25, 1999


               AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

     This Amended and Restated Registration Rights Agreement (this "Agreement")
is made and entered into as of February 25, 1999, by and among American Tower
Corporation, a Delaware corporation ("ATC"), and the undersigned Persons which
have heretofore agreed to acquire or have acquired the Registrable Securities
(individually a "Stockholder" and collectively the "Stockholders" which term is
further defined in Section 12(a)).

     WHEREAS, American Tower Systems Corporation (now known as American Tower
Corporation) and certain of the Stockholders are parties to a Registration
Rights Agreement, dated as of January 22, 1998 (the "Original Registration
Rights Agreement"); and

     WHEREAS, ATC and the Stockholders desire to amend and restate the Original
Registration Rights Agreement in its entirety to make certain changes to the
Original Registration Rights Agreement; and

     WHEREAS, ATC has entered into and may in the future enter into agreements
pursuant to which it has agreed or will have agreed to issue securities the
holders of which have required or will require registration rights of a nature
set forth in this Agreement;

     NOW, THEREFORE, in consideration of the recitals, the mutual covenants and
agreements herein contained, and other valuable consideration, the receipt,
adequacy and sufficiency of which are hereby acknowledged, the parties hereto,
intending to be legally bound, do hereby covenant and agree as follows:

     1.   Registration of Securities.

     (a)  Registration by ATC.  If at any time or from time to time ATC shall
propose to file on its behalf or on behalf of any of its security holders a
registration statement under the Securities Act with respect to any class of
Common Stock, except in connection with an Excluded Offering, ATC shall, except
to the extent not required to do so pursuant to the provisions of Section 1(d)
or 1(e), in each case:

          (i)    promptly give written notice to each Stockholder at least
     thirty (30) days (or such shorter period as ATC deems reasonable under the
     circumstances) before the anticipated filing date. Such notice shall
     include the anticipated offering price or range thereof and the plan of
     distribution;

          (ii)   include in such registration (and any related qualification
     under blue sky or other state securities laws), and, at the request of a
     Stockholder, in any underwriting involved therein, all Registrable
     Securities specified in a written request or requests, made within ten (10)
     business days after such written notice from ATC, by any Stockholder; and

          (iii)  use its reasonable business efforts to cause the managing
     underwriter or underwriters of any proposed underwritten offering of any
     class of Common Stock to permit the Registrable Securities requested to be
     included in the Registration Statement for such offering on the same terms
     and conditions as the Common Stock of ATC included therein.
     Notwithstanding the foregoing, if the managing underwriters of such
     offering deliver a written opinion to the holders of such Registrable
     Securities that marketing considerations require a limitation on the
     Registrable Securities included in any Registration Statement filed under
     this Section, then, subject to the advice of said managing underwriter or
     underwriters as to the size and composition


     of the offering, and subject to the provisions of Section 1(d), such
     limitation will be imposed pro rata (based upon the relative proposed
     public offering price of the Registrable Securities proposed to be
     included) among all holders of Registrable Securities who requested
     inclusion in the registration pursuant to this Section.

     If any Stockholder desires to have Registrable Securities registered under
this Section, it shall be required so to advise ATC in writing within ten (10)
business days after the date of ATC's notice, setting forth the number or amount
of Registrable Securities for which registration is so requested.  Neither the
delivery of the notice by ATC nor of the request by any Stockholders shall in
any way obligate ATC to file a Registration Statement and, notwithstanding such
filing, ATC may, at any time prior to the effective date thereof, determine not
to offer the securities to which the registration statement relates without
liability to any of the Stockholders.  No registration of Registrable Securities
effected under this Section shall relieve ATC of its obligation to effect
registration of Registrable Securities upon any request made pursuant to the
provisions of Section 1(b).

     Anything in this Section 1(a) to the contrary notwithstanding, the
provisions of this Section 1(a) shall not apply to any registration statement
filed by ATC under the Securities Act pursuant to the provisions of the CSFB
Agreement.

     (b)  Registration at Stockholders' Request'.  Upon the written request of
any Significant Stockholder requesting that ATC effect the registration under
the Securities Act of all or part of the Registrable Securities held by such
Stockholder, specifying the intended method or methods of disposition of such
Registrable Securities, ATC shall, except to the extent not required to do so
pursuant to the provisions of this Section 1(b) or Section 1(d) or (e), promptly
(and in any event within five (5) business days) give written notice of such
requested registration to all holders of Registrable Securities and thereupon
will expeditiously prepare and, within forty-five (45) days, use its reasonable
business efforts to file under the Securities Act a registration statement and
effect the registration of:

          (i)  the Registrable Securities which ATC has been so requested to
     register by such Stockholders, for disposition in accordance with the
     intended method of disposition stated in such request, and

          (ii) all other Registrable Securities which ATC has been requested to
     register by the holders of Registrable Securities by written request
     delivered to ATC within ten (10) business days after the giving of such
     notice by ATC (which request shall specify the intended method of
     disposition of such Registrable Securities).

     Each registration requested pursuant to this Section shall be effected by
the filing of a Registration Statement on Form S-1 (or such other form as the
Commission may from time to time require in order to effectuate a public
offering of common stock of a company such as ATC and in a method of disposition
such as that proposed), unless the use of a different form has been agreed upon
in writing by holders of not less than a majority in value (based upon the
proposed public offering price) of the Registrable Securities as to which
registration has so been requested.  Notwithstanding the preceding sentence, ATC
need not so cause a Registration Statement so filed pursuant to the provisions
of this Section on a Form S-1 (or any successor form) to become effective under
the Securities Act on more than four (4) occasions, one of which can be
initiated only by or with the consent of Cox; provided, however, that there
shall be no limit on the number of times ATC is obligated to file Registration
Statements on Form S-2 or S-3 (or any successor forms) pursuant to the
provisions of this Section (except as contemplated by the definition of
Significant Stockholder); and provided further, however, that any registration
of Registrable Securities requested by one or more Stockholders pursuant to this
Section

                                      -2-


which shall not have become and remained effective in accordance with the
provisions of Section 1(c) shall not be deemed to be a registration for purposes
of this Section.

     ATC shall not grant to any person the right to request ATC to register, nor
shall ATC include in any registration pursuant to this Section, any securities
other than the Registrable Securities, without the written consent of holders of
not less than a majority in value (based upon the proposed public offering
price) of the Registrable Securities as to which registration has been so
requested.

     Whenever registration requested by one or more Stockholders pursuant to
this Section is for an underwritten offering, only Registrable Securities which
are to be distributed by the underwriters designated by such Stockholders may be
included in such registration, without the written consent of holders of not
less than a majority in value (based upon the proposed public offering price) of
the Registrable Securities as to which registration has been so requested.  If
Stockholders holding not less than a majority in value of the Registrable
Securities (based upon the proposed public offering price) to be included in
such registration shall determine that the number of Registrable Securities
should be limited due to market conditions or otherwise, all holders of
Registrable Securities proposing to sell Registrable Securities in such
underwritten offering shall share pro rata in the number of Registrable
Securities to be excluded from such underwritten offering, such sharing to be
based on the value (based upon the proposed public offering price) of the
respective numbers of Registrable Securities as to which registration has been
requested by such Stockholders.

          (c)  Registration Generally. If and when ATC shall be required by the
provisions of this Section to effect the registration of Registrable Securities
under the Securities Act, ATC will use its reasonable business efforts to effect
such registration to permit the sale of such Registrable Securities in
accordance with the intended method or methods of disposition thereof, and
pursuant thereto it will, subject to the provisions of Section 1(d) and 1(e), as
expeditiously as possible:

          (i)  before filing a Registration Statement or Prospectus or any
     amendments or supplements thereto, furnish to the holders of the
     Registrable Securities covered by such Registration Statement and the
     managing underwriters, if any, copies of all such documents proposed to be
     filed, which documents will be made available, on a timely basis, for
     review by such holders and underwriters, and their respective counsel, and
     ATC will not file any Registration Statement or amendment thereto or any
     Prospectus or any supplement thereto to which the holders of not less than
     a majority in value (based upon the proposed public offering price) of the
     Registrable Securities covered by such Registration Statement or the
     managing underwriters, if any, shall reasonably have objected;

          (ii) prepare and file with the Commission such amendments and post-
     effective amendments to any Registration Statement, and such supplements to
     the Prospectus, as may be reasonably requested by any holder of Registrable
     Securities included in such Registration Statement or any underwriter of
     Registrable Securities or as may be required by the rules, regulations or
     instructions applicable to the registration form utilized by ATC or by the
     Securities Act, the Exchange Act or otherwise necessary to keep such
     Registration Statement effective for the applicable period and cause the
     Prospectus as so supplemented to be filed pursuant to Rule 424 under the
     Securities Act; and comply with the provisions of the Securities Act with
     respect to the disposition of all Registrable Securities covered by such
     Registration Statement during the applicable period in accordance with the
     intended method or methods of disposition by the holders of such
     Registrable Securities set forth in such Registration Statement or
     Prospectus as so supplemented;


                                      -3-


          (iii)  notify the selling holders of Registrable Securities and the
     managing underwriters, if any, promptly, and (if requested by any such
     Person) confirm such advice in writing,

                 (A)  when the Prospectus or any supplement thereto or any
                      amendment or post-effective amendment to the Registration
                      Statement has been filed, and, with respect to the
                      Registration Statement or any post-effective amendment,
                      when the same has become effective,

                 (B)  of any request by the Commission for amendments or post-
                      effective amendments to the Registration Statement or
                      supplements to the Prospectus or for additional
                      information,

                 (C)  of the issuance by the Commission of any stop order
                      suspending the effectiveness of the Registration Statement
                      or the initiation or threatening of any proceeding for
                      such purpose,

                 (D)  if at any time the representations and warranties of ATC
                      contemplated by paragraph (xv) below cease to be true and
                      correct in all material respects,

                 (E)  of the receipt by ATC of any notification with respect to
                      the suspension of the qualification of the Registrable
                      Securities for sale in any jurisdiction or the initiation
                      or threatening of any proceeding for such purpose, and

                 (F)  of the existence of any Event which results in the
                      Registration Statement, the Prospectus or any document
                      incorporated therein by reference containing an untrue
                      statement of material fact or omitting to state a material
                      fact required to be stated therein or necessary to make
                      the statements therein, in light of the circumstances
                      under which they were made, not misleading;

          (iv)   use its reasonable business efforts to obtain the withdrawal of
     any order suspending the effectiveness of the Registration Statement or any
     qualification referred to in paragraphs (iii)(C) and (iii)(E) at the
     earliest possible moment;

          (v)    if requested by the managing underwriters or a holder of
     Registrable Securities being sold in connection with an underwritten
     offering, immediately incorporate in a Prospectus supplement or post-
     effective amendment to the Registration Statement such information as the
     managing underwriters or the holders of not less than a majority in value
     (based upon the proposed public offering price) of the Registrable
     Securities being sold reasonably request to have included therein relating
     to the plan of distribution with respect to such Registrable Securities,
     including, without limitation, information with respect to the amount of
     other Registrable Securities being sold to such underwriters, the purchase
     price being paid therefor by such underwriters and with respect to any
     other terms of the underwritten (or best efforts underwritten) offering of
     the Registrable Securities to be sold in such offering; and make all
     required filings of such Prospectus supplement or post-effective amendment
     promptly after being notified of the matters to be incorporated in such
     Prospectus supplement or post-effective amendment;

                                      -4-


          (vi)   at the request of any selling holder of Registrable Securities,
     furnish to such selling holder of Registrable Securities and each managing
     underwriter, if any, without charge, at least one signed copy of the
     Registration Statement and any post-effective amendment thereto, including
     financial statements and schedules, all documents incorporated therein by
     reference and all exhibits (including those incorporated by reference);

          (vii)  deliver to each selling holder of Registrable Securities and
     the underwriters, if any, without charge, as many copies of the
     Registration Statement, each Prospectus (including each preliminary
     prospectus) and any amendment or supplement thereto (in each case including
     all exhibits, except that ATC shall not be obligated to furnish any such
     selling holder more than two copies of such exhibits other than
     incorporation documents), as such persons may reasonably request, together
     with such documents incorporated by reference in such Registration
     Statement or Prospectus, and such other documents as such selling holder or
     underwriter may reasonably request in order to facilitate the disposition
     of the Registrable Securities covered by such registration statement; ATC
     consents to the use of each Prospectus or any supplement thereto by each
     selling holder of Registrable Securities and the underwriters, if any, in
     connection with the offering and sale of the Registrable Securities covered
     by each Registration Statement or any amendment thereto;

          (viii) prior to any public offering of Registrable Securities, use
     its reasonable business efforts to register or qualify or cooperate with
     the selling holders of Registrable Securities, the underwriters, if any,
     and their respective counsel in connection with the registration or
     qualification of such Registrable Securities for offer and sale under the
     securities or blue sky laws of such jurisdictions as any selling holder or
     underwriter reasonably requests in writing and do any and all other acts or
     things necessary or advisable to enable the disposition in such
     jurisdictions of the Registrable Securities covered by the Registration
     Statement; provided, however, that ATC will not be required to qualify
     generally to do business in any jurisdiction where it is not then so
     qualified or to take any action which would subject it to general service
     of process or general taxation in any such jurisdiction where it is not
     then so subject;

          (ix)   cooperate with the selling holders of Registrable Securities
     and the underwriters, if any, to facilitate the timely preparation and
     delivery of certificates representing Registrable Securities to be sold and
     not bearing any restrictive legends; and enable such Registrable Securities
     to be in such denominations and registered in such names as the
     underwriters may reasonably request at least two (2) business days prior to
     any sale of Registrable Securities to the underwriters;

          (x)    use its reasonable business efforts to cause the Registrable
     Securities covered by the Registration Statement to be registered with or
     approved by such other governmental agencies or authorities as may be
     necessary or advisable to enable the sellers thereof or the underwriters,
     if any, to consummate the disposition of such Registrable Securities;

          (xi)   if any event contemplated by paragraph (iii) (F) above shall
     exist, prepare and furnish to such holders a post-effective amendment to
     the Registration Statement or supplement to the Prospectus or any document
     incorporated therein by reference or file any other required document so
     that, as thereafter delivered to the purchasers of the Registrable
     Securities, the Prospectus will not contain an untrue statement of a
     material fact or omit to state any material fact required to be stated
     therein or necessary to make the statements therein, in light of the
     circumstances under which they were made, not misleading;


                                      -5-


          (xii)  cause all Registrable Securities covered by the Registration
     Statement to be listed on each securities exchange or other trading market
     on which securities of the same class are then listed or traded or, if the
     Registrable Securities are not then listed on a securities exchange, and if
     the NASD is reasonably likely to permit the inclusion of the Registrable
     Securities on NASDAQ, use its reasonable business efforts to facilitate the
     inclusion of the Registrable Securities on NASDAQ;

          (xiii) not later than the effective date of the Registration
     Statement, provide a CUSIP number for all Registrable Securities and
     provide the applicable transfer agent or agents with printed certificates
     or instruments for the Registrable Securities which are in a form eligible
     for deposit with Depository Trust Company or other transferee and otherwise
     meeting the requirements of any securities exchange or other trading market
     on which such Registrable Securities are listed or traded;

          (xiv)  pay all Registration Expenses in connection with any
     registration pursuant to the provisions of this Section.  Without limiting
     the generality of the foregoing, in connection with each Registration
     Statement required hereunder, ATC will reimburse the holders of Registrable
     Securities being registered pursuant to such Registration Statement for the
     reasonable fees and disbursements of not more than one counsel (or more
     than one counsel if a conflict exists among such selling holders in the
     exercise of the reasonable judgment of counsel for the selling holders and
     counsel for ATC, provided that such selling holders shall use their
     reasonable business efforts to minimize conflicts of counsel) chosen by the
     holders of not less than a majority in value (based on the proposed public
     offering price) of the Registrable Securities being sold;

          (xv)   enter into agreements (including underwriting agreements) and
     take all other appropriate actions in order to expedite or facilitate the
     disposition of such Registrable Securities and in such connection, whether
     or not an underwriting agreement is entered into and whether or not the
     offer and sale of the Registrable Securities is an underwritten offering:

                 (A)  make such representations and warranties to the holders of
                      such Registrable Securities and the underwriters, if any,
                      in form, substance and scope, reasonably satisfactory to
                      such holders and underwriters, as are customarily made by
                      issuers to underwriters in primary underwritten offerings;

                 (B)  obtain opinions and updates thereof of counsel which
                      counsel and opinions to ATC (in form, scope and substance)
                      shall be reasonably satisfactory to the underwriters, if
                      any, and the holders of not less than a majority in value
                      (based on the proposed public offering price) of the
                      Registrable Securities being sold, addressed to each
                      selling holder and the underwriters, if any, covering the
                      matters customarily covered in opinions requested in
                      underwritten offerings and such other matters as may be
                      reasonably requested by such holders and underwriters;

                 (C)  obtain so-called "cold comfort" letters and updates
                      thereof from ATC's independent public accountants
                      addressed to the selling holders of Registrable Securities
                      and the underwriters, if any, such letters to be in
                      customary form and covering matters of the type
                      customarily covered in "cold comfort" letters to
                      underwriters in connection with primary underwritten
                      offerings and such other matters as may be reasonably
                      requested by such holders and underwriters;

                                      -6-


                 (D)  if an underwriting agreement is entered into, cause the
                      same to set forth in full the indemnification provisions
                      and procedures of Section 3 (or such other substantially
                      similar provisions and procedures as the underwriters
                      shall reasonably request) with respect to all parties to
                      be indemnified pursuant to said Section; and

                 (E)  deliver such documents and certificates as may be
                      reasonably requested by the holders of not less than a
                      majority in value (based on the proposed public offering
                      price) of the Registrable Securities being sold or the
                      underwriters, if any, to evidence compliance with the
                      provisions of this Section and with any customary
                      conditions contained in the underwriting agreement or
                      other agreement entered into by ATC.

          The requirements of subparagraphs (B), (C) and (D) of this paragraph
          (xv) shall be complied with at the effectiveness of such Registration
          Statement, each closing under any underwriting or similar agreement as
          and to the extent required thereunder and from time to time as may
          reasonably be requested by a majority in value (based on the proposed
          public offering price) of Registrable Securities being sold pursuant
          to such Registration Statement, all in a manner consistent with
          customary industry practice;

          (xvi)   make available to a representative of the holders of not less
     than a majority in value (based on the proposed public offering price) of
     the Registrable Securities, any underwriter participating in any
     disposition pursuant to such Registration Statement, and any attorney or
     accountant retained by such holders or underwriter, all  financial,
     corporate and other records and documents of ATC, and cause ATC's officers,
     directors and employees to supply all information reasonably requested by
     any such representatives, underwriter, attorney or accountant in connection
     with the registration, with respect to each at such time or times as the
     person requesting such information shall reasonably determine; provided,
     however, that any records, information or documents that are designated by
     ATC in writing as confidential shall be kept confidential by such persons
     unless disclosure of such records, information or documents is required by
     court or administrative order or applicable law or otherwise becomes public
     without breach of the provisions of this paragraph;

          (xvii)  otherwise use its reasonable business efforts to comply with
     the Securities Act, the Exchange Act, all applicable rules and regulations
     of the Commission and all applicable state blue sky and other securities
     laws, rules and regulations, and make generally available to its security
     holders, earnings statements satisfying the provisions of Section 11(a) of
     the Securities Act, no later than thirty (30) days after the end of any 12-
     month period (or ninety (90) days if the end of such 12-month period
     coincides with the end of a fiscal quarter or fiscal year, respectively) of
     ATC (A) commencing at the end of any month in which Registrable Securities
     are sold to underwriters in an underwritten offering, or, if not sold to
     underwriters in such an offering, (B) beginning with the first month
     commencing after the effective date of the Registration Statement, which
     statements shall cover said 12-month periods;

          (xviii) cooperate and assist in any filings required to be made with
     the NASD and in the performance of any due diligence investigation by any
     underwriter (including any "qualified independent underwriter" that is
     required to be retained in accordance with the rules and regulations of the
     NASD);


                                      -7-


          (xix)  promptly prior to the filing of any document which is to be
     incorporated by reference into the Registration Statement or the Prospectus
     (after the initial filing of the Registration Statement) provide copies of
     such document to the selling holders of Registrable Securities, the
     underwriters, if any, and their respective counsel, make ATC's
     representatives available for discussion of such document with such persons
     and make such changes in such document prior to the filing thereof as any
     such persons may reasonably request; and

          (xx)   cooperate and assist in any filings required to be made with
     the FCC, including without limitation the obtaining of any consents of the
     FCC required in connection with any change in control of ATC.

          (d)    Restrictions on Registration.  Anything in Section 1 to the
contrary notwithstanding, ATC shall not be required to register Registrable
Securities on behalf of any Stockholder to the following extent and subject to
the following conditions:  in the case of any registration initially proposed to
be filed solely on behalf of ATC if, in the opinion of the managing underwriters
of the proposed public offering (a copy of which opinion shall have been
furnished to any Stockholder requesting registration (or each such holder if ATC
has elected not to notify the holders of Registrable Securities pursuant to the
provisions of Section 1(a) because it is not required to include any Registrable
Securities in such registration pursuant to the provisions of this Section)),
such registration (or such portion thereof as may be specified in such opinion)
would adversely affect the proposed public offering price or the plan of
distribution contemplated by the proposed ATC offering, in which event ATC shall
(unless in the opinion of such managing underwriters (a copy of which shall be
similarly furnished) to do so would materially and adversely affect the proposed
public offering price or such plan of distribution)) cause such Registration
Statement to remain in effect and to be phrased in such a manner so that the
Stockholders requesting registration thereunder may, during a period commencing
not less than sixty (60) days or more than ninety (90) days (or such other
period as such managing underwriters may approve as not so adversely affecting
the proposed public offering price or such plan of distribution) after the
closing of the sale to the underwriters pursuant to the original distribution
thereunder, offer and sell under such Registration Statement the Registrable
Securities referred to in the request of registration pursuant to this Section
1.

     (e)  Additional Restrictions on Registration. Anything in this Agreement to
the contrary notwithstanding, ATC shall not be required to file a registration
statement requested pursuant to this Section 1 if ATC has furnished, to the
Stockholders requesting a registration statement to be filed, a certificate
signed by the Chief Executive Officer or the Chief Financial Officer of ATC
stating that in the good faith judgment of the signer of such certificate the
filing of a registration statement would require the disclosure of material
information that ATC has a bona fide business purpose for preserving as
confidential and that is not then otherwise required to be disclosed; provided,
however, that ATC's obligation to use its reasonable business efforts to effect
a registration pursuant to this Section 1 may not be deferred pursuant to this
paragraph (e) for more than ninety (90) days from the date of receipt of a
written request from such Stockholders, and provided further, however, that ATC
shall not utilize this right more than once during any twelve (12) month period
unless the Stockholders requesting such registration have been afforded a
reasonable period (not less than ninety (90) days) during such twelve (12) month
period to effect such registration.

     2.   Conditions to Registration.
          --------------------------

     Each Stockholder's right to have Registrable Securities included in any
Registration Statement filed by ATC in accordance with the provisions of Section
1 shall be subject to the following conditions:


                                      -8-


          (a) The holders on whose behalf such Registrable Securities are to be
     included shall be required to furnish ATC in a timely manner with all
     information required by the applicable rules and regulations of the
     Commission concerning the proposed method of sale or other disposition of
     such Registrable Securities, the identity of and compensation to be paid to
     any proposed underwriters to be employed in connection therewith, and such
     other information as may be reasonably requested by ATC or its counsel
     properly to prepare and file such Registration Statement in accordance with
     applicable provisions of the Securities Act;

          (b) If any such holder desires to sell and distribute Registrable
     Securities over a period of time, or from time to time, at then prevailing
     market prices, then any such holder shall execute and deliver to ATC such
     written undertakings as ATC and its counsel may reasonably request in order
     to assure full compliance with applicable provisions of the Securities Act
     and the Exchange Act;

          (c) In the case of any underwritten offering on behalf of the holders
     of Registrable Securities pursuant to the provisions of Section 1(b), the
     managing underwriters shall be subject to the approval of ATC, such
     approval not to be unreasonably withheld, delayed or conditioned;

          (d) In the case of any registration requested pursuant to the
     provisions of Section 1(a), the offering price for any Registrable
     Securities to be so registered shall be no less than for any securities of
     the same class then to be registered for sale for the account of ATC or
     other security holders, unless such Registrable Securities are to be
     offered from time to time based on the prevailing market price;

          (e) Upon receipt of any notice from ATC of the existence of any event
     of the nature referred to in paragraph (iii) of Section 1(c), such holder
     will forthwith discontinue disposition of Registrable Securities until such
     holders receipt of the copies of the supplemented or amended Prospectus
     contemplated by such paragraph, or until it is advised in writing by ATC
     that the use of the Prospectus may be resumed, and has received copies of
     any additional or supplemental filings which are incorporated by reference
     in the Prospectus, and, if so directed by ATC, such holder will deliver to
     ATC (at its expense) all copies, other than permanent file copies then in
     such holder's possession, of the Prospectus covering such Registrable
     Securities current at the time of receipt of such notice; and

          (f) In the event any filing with or consent of the FCC is required,
     cooperate and assist in any such filings, including without limitation
     providing all information required in obtaining any consents of the FCC
     required in connection with any change in control of ATC.

     3.   Indemnification.
          ---------------

     (a)  Indemnification by ATC.  In the event of the registration of any
Registrable Securities under the Securities Act pursuant to the provisions
hereof, ATC will, to the extent permitted by Applicable Law, indemnify and hold
harmless each Stockholder on whose behalf such Registrable Securities shall have
been registered, its partners, trustees, advisory committee members, directors,
officers, employees, representatives and agents, each underwriter, broker and
dealer, if any, who participates in the offering or sale of such Registrable
Securities, and each other Person, if any, who controls such Stockholder or any
such underwriter, broker or dealer within the meaning of the Securities Act or
the Exchange Act (each such person being hereinafter sometimes referred to as an
"indemnified person"), from and against any Claims, joint or several, to which
such indemnified person may become subject, including without limitation under
the Securities Act, the Exchange Act or any state securities or blue sky law,
insofar as such Claims arise out of or are based upon any untrue statement or
alleged untrue


                                     -9-


statement of any material fact contained or incorporated by reference in any
Registration Statement or Prospectus or any amendment or supplement thereto or
in any preliminary prospectus, or any document incorporated by reference
therein, or arise out of or based upon the omission or alleged omission to state
therein a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading, and will reimburse each such indemnified person for any legal or
any other expenses reasonably incurred by such indemnified person in connection
with investigating or defending, settling or satisfying any such Claim;
provided, however, that ATC will not be liable in any such case to the extent
that any such Claim arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made or incorporated by
reference in the Registration Statement, Prospectus, amendment or supplement in
reliance upon and in conformity with written information furnished to ATC by
such indemnified person specifically stating that it is for use in preparation
thereof. Such indemnity shall remain in full force and effect regardless of any
investigation made by or on behalf of such indemnified person and shall survive
the transfer of such Registrable Securities by such Stockholder

     (b) Indemnification by Holders of Registrable Securities.  In the event of
the registration of any Registrable Securities under the Securities Act pursuant
to the provisions hereof, each Stockholder on whose behalf such Registrable
Securities shall have been registered will, to the extent permitted by
Applicable Law, severally but not jointly, indemnify and hold harmless, ATC,
each director of ATC, each officer of ATC who signs the registration statement,
each underwriter, broker and dealer, if any, who participates in the offering
and sale of such Registrable Securities and each other Person, if any, who
controls ATC or any such underwriter, broker or dealer within the meaning of the
Securities Act or the Exchange Act (each such person including without
limitation ATC being hereinafter sometimes referred to as an "indemnified
person"), against any Claims, joint or several, to which such indemnified person
may become subject, including without limitation under the Securities Act, the
Exchange Act or any state securities or blue sky law, insofar as such Claims
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained or incorporated by reference in any Registration
Statement or Prospectus or any amendment or supplement thereto or any document
incorporated by reference therein, or arise out of or are based upon the
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, provided that such
untrue statement or alleged untrue statement or omission or alleged omission has
been made or incorporated therein in reliance upon and in conformity with
written information furnished to ATC by such Stockholder specifically stating
that it is for use in preparation thereof, and will reimburse each such
indemnified person for any legal or any other expenses reasonably incurred by
ATC or such indemnified person in connection with investigating or defending,
settling or satisfying any such Claim.  Such indemnity shall remain in full
force and effect regardless of any investigation made by or on behalf of such
indemnified person and shall survive the transfer of such Registrable Securities
by such Stockholder.  In no event shall the liability of any such Stockholder
hereunder be greater in amount than the dollar amount of the proceeds received
by such Stockholder upon the sale of the Registrable Securities giving rise to
such indemnification obligation.

     (c) Procedure.  Promptly after receipt by an indemnified party of notice of
the commencement of any action (including any governmental investigation or
inquiry), such indemnified party will, if a claim in respect thereof is to be
made against an indemnifying party, give written notice to such indemnifying
party of the commencement thereof, but the omission so to notify the
indemnifying party will not relieve it from any liability which it may have to
any indemnified party otherwise than pursuant to the provisions of this Section
and then only to the extent such indemnifying party has been prejudiced, or
otherwise adversely affected thereby and in no event shall such failure relieve
the indemnifying party from any other liability which it may have to the
indemnified party.  In case any such


                                     -10-


action is brought against any indemnified party, and it notifies an indemnifying
party of the commencement thereof, the indemnifying party will be entitled to
participate in, and to the extent that it may wish, jointly with any other
indemnifying party similarly notified, to assume the defense thereof, with
counsel reasonably satisfactory to such indemnified party, and after notice from
the indemnifying party to such indemnified party, the indemnifying party shall
not, except as hereinafter provided, be responsible for any legal or other
expenses subsequently incurred by such indemnified party in connection with the
defense thereof, other than reasonable cost of investigation. No indemnifying
party will consent to entry of any judgment or enter into any settlement which
does not include as an unconditional term thereof the giving by the claimant or
plaintiff to such indemnified party of a release from all liability in respect
to such Claim.

     Such indemnified party shall have the right to employ separate counsel in
any such action and to participate in the defense thereof, but the fees and
expenses of such counsel shall be the expense of such indemnified party, unless
(i) the indemnifying party has agreed to pay such fees and expenses, (ii) the
indemnifying party shall have failed to assume the defense of such action or
proceeding or has failed to employ counsel reasonably satisfactory to such
indemnified party in any such action or proceeding, or (iii) the named parties
to any such action or proceeding (including any impleaded parties) include both
such indemnified party and the indemnifying party, and such indemnified party
shall have been advised in writing by counsel that representation of both
parties by the same counsel would be inappropriate due to actual or potential
material differing interests between them (in which case, if such indemnified
party notifies the indemnifying party in writing that it elects to employ
separate counsel at the expense of the indemnifying party, the indemnifying
party shall not have the right to assume the defense of such action or
proceeding on behalf of such indemnified party, it being understood, however,
that the indemnifying party shall not, in connection with any one such action or
proceeding or separate but substantially similar or related actions or
proceedings in the same jurisdiction arising out of the same general allegations
or circumstances, be liable for the fees and expenses of more than one separate
firm of attorneys at any time for such indemnified party and any other
indemnified parties, which firm shall be designated in writing by such
indemnified parties).  The indemnifying party shall not be liable for any
settlement of any such action or proceeding effected without its written
consent, but if settled with its written consent, or if there be a final
judgment for the plaintiff in any such action or proceeding, the indemnifying
party agrees to indemnify and hold harmless such indemnified parties from and
against any loss or liability by reason of such settlement or judgment.

     (d) Contribution.  If the indemnification provided for in this Section or
in Section 4 is unavailable, because prohibited or restricted by Applicable Law,
to a party that would have been an indemnified party under either such Section
in respect of any Claims referred to therein, then each party that would have
been an indemnifying party thereunder shall, in lieu of indemnifying such
indemnified party, contribute to the amount paid or payable by such indemnified
party as a result of such Claims in such proportion as is appropriate to reflect
the relative fault of the indemnifying party on the one hand and such
indemnified party on the other in connection with the statement or omission
which resulted in such Claims, as well as any other relevant equitable
considerations.  The relative fault shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by the indemnifying party or such indemnified party and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.  Notwithstanding the provisions
of this Section, a holder of Registrable Securities shall not, as an indemnified
party, be required to contribute any amount in excess of the amount by which the
total price at which the Registrable Securities sold by such indemnified party
or its Affiliates and distributed to the public were offered to the public
exceeds the amount of any damages which such indemnified party or its Affiliates
have otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission.  ATC and each

                                     -11-


holder of Registrable Securities agrees that it would not be just and equitable
if contribution pursuant to this Section were determined by pro rata allocation
or by any other method of allocation which does not take account of the
equitable considerations referred to above in this Section. The amount paid or
payable by an indemnified party as a result of the Claims referred to above in
this Section or Section 4 shall include any legal or other expenses reasonably
incurred by such indemnified party in connection with investigation or defending
any such action or claim (which shall be limited as provided in Section 3(c) if
the indemnifying party has assumed the defense of any such action in accordance
with the provisions thereof). The obligations of each Stockholder under this
Section 3(d) are several and not joint.

     No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the Securities Act) shall be entitled to contribution from any
person who was not guilty of such fraudulent misrepresentation.

     Indemnification or, if appropriate, contribution, similar to that specified
in the preceding provisions of this Section (with appropriate modifications)
shall be given by ATC and each seller of Registrable Securities with respect to
any required registration or other qualification of Registrable Securities under
any Applicable Law other than the Securities Act.

     In the event of any underwritten offering of Registrable Securities under
the Securities Act pursuant to the provisions of Section 1, ATC and each
Stockholder on whose behalf Registrable Securities shall have been registered
agree to enter into an underwriting agreement, in standard form, with the
underwriters, which underwriting agreement may contain additional provisions
with respect to indemnification and contribution in lieu of the provisions of
this Section.

     4.   Exchange Act Registration.
          -------------------------

     ATC covenants and agrees that, at its expense, until such time as the
Stockholders no longer hold any Registrable Securities:

          (a) it will, if required by law, maintain a registration statement
     (containing such information and documents as the Commission shall specify)
     with respect to the Common Stock of ATC under Section 12(b) or 12(g) of the
     Exchange Act effective and will file on time such information, documents
     and reports as the Commission may require or prescribe for companies whose
     stock has been registered pursuant to said Section 12(b) or 12(g);

          (b) it will, if a registration statement with respect to the Common
     Stock of ATC under Section 12(b) or Section 12(g) is effective, upon the
     request of any Stockholder, make whatever other filings with the Commission
     or otherwise make generally available to the public such financial and
     other information as any Stockholder may deem necessary or advisable in
     order to enable him to be permitted to sell shares of Common Stock pursuant
     to the provisions of Rule 144 promulgated under the Securities Act (or any
     successor rule or regulation thereto or any statute hereafter adopted to
     replace or to establish the exemption that is now covered by said Rule
     144);

          (c) it will, if not subject to Section 13 to 15(d) of the Exchange
     Act, upon the request of any Significant Stockholder made on or after
     December 31, 1998, make publicly available the information specified in
     subparagraph (c)(2) of said Rule 144, and will take such further action as
     any Stockholder may reasonably request, all to the extent required from
     time to time to enable such Stockholder to sell Registrable Securities
     without registration under the Securities Act within the limitation of the
     exemptions provided by said Rule 144 (or any successor rule or


                                     -12-


     regulation to either thereof or any statute hereafter adopted to replace or
     to establish the exemption that is now covered by said Rule 144); and

          (d) it will, if not subject to Section 13 to 15(d) of the Exchange
     Act, upon the request of any Stockholder agree to furnish to a prospective
     purchaser (subject to the execution by it of a confidentiality agreement in
     form, scope and substance reasonably satisfactory to ATC) the information
     specified in subparagraph (d)(4) of Rule 144A promulgated under the
     Securities Act (or any successor rule or regulation thereto or any statute
     hereafter adopted to replace or to establish the exemption that is now
     covered by said Rule 144A), and will take such further action as any
     Stockholder may reasonably request, all to the extent required from time to
     time to enable such Stockholder to sell Registrable Securities without
     registration under the Securities Act within the limitation of the
     exemptions provided by said Rule 144A (or any successor rule or regulation
     thereto or any statute hereafter adopted to replace or to establish the
     exemption that is now covered by said Rule 144A); and

          (e) upon the request of any Stockholder, it will deliver to such
     Stockholder a written statement as to whether it has complied with the
     requirements of this Section.

     ATC represents and warrants that any such registration statement or any
information, documents or report filed with the Commission in connection
therewith or any information so made public shall not contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements contained therein,
in light of the circumstances under which they were made, not misleading.  ATC
shall, to the extent permitted by Applicable Law, indemnify and hold harmless
(or to the extent the same is not enforceable, make contribution to) the
Stockholders, their partners, trustees, advisory committee members, officers,
directors, employees, representatives and agents, each broker, dealer or
underwriter (within the meaning of the Securities Act) acting for any
Stockholder in connection with any offering or sale by such Stockholder of
Registrable Securities or any person, firm or corporation controlling (within
the meaning of Section 15 of the Securities Act or Section 20 of the Exchange
Act) such Stockholder or any such broker, dealer or underwriter from and against
any and all Claims arising out of or resulting from any breach of the foregoing
representation or warranty, all on terms and conditions comparable to those set
forth in Section 3; provided, however, that ATC shall be given written notice
and an opportunity to participate in, and, to the extent that it may wish, to
assume on terms and conditions comparable to those set forth in Section 3, the
defense thereof.

     5.   Termination of Registration Obligations.

     The obligations of ATC to any Stockholder with respect to its rights of
registration provided for in Section 1:

          (a) shall continue until such time as Sullivan & Worcester LLP, or
     other counsel for ATC knowledgeable in securities law matters and
     reasonably acceptable to such Stockholder has delivered a written opinion
     to ATC and such Stockholder to the effect that either (i) such Stockholder
     has no further obligation to comply with the registration requirements of
     the Securities Act or to deliver a prospectus meeting the requirements of
     Section 10(a)(3) of the Securities Act in connection with further sales by
     such Stockholder of Registrable Securities or (ii) such Stockholder is able
     to sell all of the Registrable Securities owned by him pursuant to the
     provisions of Rule 144 under the Securities Act in a three-month period;
     and

          (b) shall not apply to any proposed sales or other dispositions or
     offers therefor of any Registrable Securities with respect to which
     Sullivan & Worcester LLP, or other counsel for ATC knowledgeable in
     securities law matters and reasonably acceptable to such Stockholder has


                                     -13-


     delivered a written opinion to ATC and the Stockholder proposing to make
     such offer, sale or other disposition to the effect that such Stockholder
     has no obligation to comply with the registration requirements of the
     Securities Act or to deliver a prospectus meeting the requirements of
     Section 10(a)(3) of the Securities Act.

     Any such opinion (a copy of which shall be addressed to such Stockholder)
shall be reasonably satisfactory (in the case of such opinion as to form, scope
and substance) to such Stockholder.

     ATC shall, to the extent permitted by Applicable Law, indemnify and hold
harmless each Stockholder, its partners, trustees, advisory committee members,
officers, directors, employees, representatives and agents and each person, if
any, who controls such Stockholder within the meaning of either Section 15 of
the Securities Act or Section 20 of the Exchange Act, against any Claims to
which such Stockholder, or such partners, trustees, advisory committee members,
officers, directors, employees, representatives and agents or controlling
persons may become subject under the Securities Act, the Exchange Act or
otherwise, insofar as such Claims arise out of or are based upon the failure to
register the Registrable Securities because of the invocation by ATC of the
provisions of this Section under the Securities Act, all on terms and conditions
comparable to those set forth in Section 3; provided, however, that ATC shall be
given written notice and an opportunity to participate in, and to the extent
that it may wish, to assume, on terms and conditions comparable to those set
forth in Section 3, the defense thereof.

     The indemnification and contributions provisions of Sections 3 and 4 and
this Section, and the obligations of each Stockholder pursuant to the provisions
of Section 9, shall survive any termination of ATC's obligations pursuant to
this Section.

     6.   Registration Rights of Others.

     ATC represents and warrants that it has not previously entered into any
agreement with respect to its securities granting any registration rights to any
Person.

     7.   Mergers, etc.
          ------------

     In addition to any other restrictions on mergers, consolidations and
reorganizations contained in the Restated Certificate of Incorporation, by-laws
or agreements of ATC, ATC covenants and agrees that it shall not, directly or
indirectly, enter into any merger, consolidation, sale of all or substantially
all of its assets or business, liquidation, dissolution or reorganization in
which ATC shall not be the surviving corporation unless the surviving
corporation shall, prior to such merger, consolidation or reorganization, agree
in a writing to assume all of the obligations of ATC under this Agreement, and
for that purpose references hereunder to "Registrable Securities" shall be
deemed to include the securities which such holders would be entitled to receive
in exchange for Registrable Securities pursuant to any such merger,
consolidation, sale of all or substantially all of its assets or business,
liquidation, dissolution or reorganization.

     8.   Annual and Quarterly Reports; Other Information.

     ATC will deliver to each Stockholder so long as such Stockholder holds any
Registrable Securities:

          (a) as soon as practicable after the end of each fiscal year and each
     quarter, audited annual and unaudited consolidated quarterly financial
     statements of ATC, including a consolidated balance sheet, a consolidated
     statement of operations, and a consolidated statement


                                     -14-


     of cash flow, for such year or quarter, all prepared in accordance with
     generally accepted accounting principles;

          (b) as soon as available, copies of all documents filed with the
     Commission; and

          (c) such other financial and other information as may, from time to
     time, be reasonably requested by any Significant Stockholder.

     9.   Lock-Up Agreement.
          -----------------

     Each Stockholder (other than any Stockholder who is not a director and
owns, at such time, 2% or less of all of the Common Stock) agrees that, if
required in connection with the contemplated offering by the managing
underwriter, (a) it and the Restricted Securities shall be bound by any "lock-
up" or other agreement between ATC and any underwriter of Common Stock (or other
equity securities of ATC) which may be entered into in connection with each
underwritten public offering of the Common Stock (or other equity securities of
ATC) so long as the "lock-up" period does not exceed ninety (90) days (or such
longer period (not exceeding one hundred and eighty (180) days) in connection
with the initial underwritten public offering of Class A Common Stock as the
managing underwriters shall have requested) following the commencement of the
public offering, and (b) it will execute such agreements or other documents as
may be reasonably requested by any such underwriter in order to evidence its
agreement set forth in this Section.

     10.  Withdrawals.
          -----------

     Any Stockholder may at any time withdraw any request made pursuant to
Section 1 for registration of its Registrable Securities; provided, however,
that to the extent that such withdrawal or withdrawals result in a termination
of any offering proposed to be made pursuant to Section 1, ATC shall be deemed
to have consummated such offering for purposes of Section 1 unless such
Stockholder(s) agree to reimburse ATC for all Registration Expenses incurred by
ATC in connection with such terminated offering.  Notwithstanding anything in
the foregoing provisions of this Section to the contrary, the provisions of this
Section shall not be applicable in the event that any such withdrawal or
withdrawals resulting in such termination is or are effected on account of (a)
ATC's failure to disclose any material fact required to be disclosed in the
registration statement or any prospectus relating to such offering or (b) any
material adverse change in ATC, its business, assets or condition (financial or
other).

     11.  Definitions.
          -----------

     As used herein, unless the context otherwise requires, the terms (or any
variant in the form thereof) set forth in this Agreement shall have the
respective meanings so set forth.  Terms defined in the singular shall have a
comparable meaning when used in the plural, and vice versa, and the reference to
any gender shall be deemed to include all genders.  Unless otherwise defined or
the context otherwise clearly requires, terms for which meanings are provided in
this Agreement shall have such meanings when used in each agreement, notice,
certificate, communication, opinion or other document executed or required to be
executed pursuant hereto or thereto or otherwise delivered, from time to time,
pursuant hereto or thereto.

     "AFFILIATE" of any Person shall mean any Person which, directly or
indirectly, owns or controls, is under common ownership or control with, or is
owned or controlled by, such Person.  A Person shall be deemed to be "controlled
by" any other Person if such other Person possesses, directly or indirectly,
power to direct or cause the direction of the management or policies of such
Person or the disposition of


                                     -15-


its assets or property, whether by stock, equity or other ownership, contract,
arrangement or understanding, or otherwise.

     "AGREEMENT" is defined in the first paragraph.

     "APPLICABLE LAW" shall mean any Law of any Authority, whether domestic or
foreign, including without limitation all federal and state Laws, to which the
Person in question is subject or by which it or any of its business or
operations is subject or any of its property is bound.

     "ARS" shall mean American Radio Systems Corporation, a Delaware
corporation.

     "ARS AGREEMENT" shall mean the Registration Rights Agreement, dated as of
November 1, 1993 by and among ARS and certain of the Stockholders named therein,
as amended and restated by the Original Registration Rights Agreement.

     "ARS MERGER AGREEMENT" shall mean the Agreement and Plan of Merger, dated
as of September 19, 1997, as amended and restated as of December 18, 1997, by
and among ARS, CBS Corporation (formerly, Westinghouse Electric Corporation) and
R Acquisition Corp.

     "ATC" is defined in the first paragraph.

     "ATC STOCK PURCHASE AGREEMENT" shall mean the Stock Purchase Agreement,
dated as of January 8, 1998, by and between ATC and certain of the Stockholders
named therein.

     "AUTHORITY" shall mean any governmental or quasi-governmental authority,
whether executive, legislative, judicial, administrative or other, or any
combination thereof, including without limitation any federal, state,
territorial, county, municipal or other government or governmental or quasi-
governmental agency, arbitrator, board, body, branch, bureau or comparable
agency or Entity, commission, corporation, court, department, instrumentality,
mediator, panel, system or other political unit or subdivision or other Entity
of any of the foregoing, whether domestic or foreign.

     "CLAIMS" shall mean, with respect to any Person, any and all debts,
liabilities, obligations, losses, damages, deficiencies,  assessments and
penalties of or against such Person, together with all Legal Actions, pending or
threatened, claims and judgments of whatever kind and nature relating thereto,
and all fees, costs, expenses and disbursements (including without limitation
reasonable attorneys' and other legal fees, costs and expenses) relating to any
of the foregoing.

     "COMMON STOCK", "CLASS A COMMON", "CLASS B COMMON" or "CLASS C COMMON",
shall mean those respective securities described in the Restated Certificate of
Incorporation of ATC.

     "COMMISSION" shall mean the Securities and Exchange Commission or any
successor Authority.

     "COX" shall mean Cox Telecom Towers, Inc., a Delaware corporation, and
shall include any Affiliate of Cox to whom it shall have transferred Registrable
Securities in a transaction not involving a registration of such securities
under the Securities Act.

     "CSFB AGREEMENT" shall mean the registration rights agreement, dated as of
February 4, 1999, by and between ATC and Credit Suisse First Boston, as from
time to time amended in accordance with its terms.


                                     -16-


     "ENTITY" shall mean any corporation, firm, unincorporated organization,
association, partnership, a trust (inter vivos or testamentary), an estate of a
deceased, insane or incompetent individual, business trust, joint stock company,
joint venture or other organization, entity or business, whether acting in an
individual, fiduciary or other capacity, or any Authority.

     "EQUITY AGREEMENT" shall mean any one of (i) the ARS Agreement, (ii) the
ATC Stock Purchase Agreement; (iii) the Gearon Agreement, (iv) the ARS Merger
Agreement, and (v) any other agreements approved from time to time by Board of
Directors of ATC pursuant to which Common Stock of ATC may be issued.  "EQUITY
AGREEMENTS" shall mean all of the foregoing agreements.

     "EVENT" shall mean the existence or occurrence of any act, action,
activity, circumstances, condition, event, fact, failure to act, omission,
incident or practice, or any set or combination of any of the foregoing.

     "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, and the
rules and regulations of the Commission thereunder, all as from time to time in
effect, or any successor law, rules or regulations, and any reference to any
statutory or regulatory provision shall be deemed to be a reference to any
successor statutory or regulatory provision.

     "EXCLUDED OFFERING" shall mean (a) an offering relating solely to dividend
reinvestment plans or stock option or other employee benefit plans, (b) any
merger, consolidation or acquisition, (c) any exchange or tender offer, whether
with existing security holders of ATC or any other Person, or (d) a firm
underwritten offering relating solely to convertible securities or units
consisting of securities senior to Common Stock and warrants, options and rights
to acquire Common Stock in which the managing underwriters shall have objected
to the inclusion of any Registrable Securities.

     "FCC" shall mean the Federal Communications Commission or any successor
Authority.

     "GEARON AGREEMENT" shall mean the Agreement and Plan of Merger, dated as of
November 21, 1997, by and among ATC, American Tower Systems, Inc. (now known as
American Towers, Inc.), Gearon & Co., Inc. and J. Michael Gearon, Jr.

     "GEARON STOCKHOLDERS" shall mean the parties who received ATC Class A
Common Stock in exchange for their capital stock in Gearon & Co., Inc. pursuant
to terms and provisions of the Gearon Agreement.  All registration decisions of
the Gearon Stockholders under this Agreement shall be made by the holders of not
less than a majority in value (based on the proposed public offering) of the
Registrable Securities held by such Gearon Stockholders.

     "LAW"  shall mean any (a) administrative, judicial, legislative or other
action, code, consent decree, constitution, decree, directive, enactment,
finding, law, injunction, interpretation, judgment, order, ordinance, policy
statement, proclamation, promulgation, regulation, requirement, rule, rule of
law, rule of public policy, settlement agreement, statute, or writ of any
Authority, domestic or foreign; (b) the common law, or other legal precedent; or
(c) arbitrator's, mediator's or referee's award, decision, finding or
recommendation.

     "LEGAL ACTION" shall mean, with respect to any Person, any and all
litigation or legal or other actions, arbitrations, counterclaims,
investigations, proceedings, requests for material information by or pursuant to
the order of any Authority or suits, at law or in arbitration, equity or
admiralty, whether or not purported to be brought on behalf of such Person,
affecting such Person or any of such Person's business, property or assets.


                                     -17-


     "NASD" shall mean the National Association of Securities Dealers, Inc.

     "NASDAQ" shall mean the automatic quotation system of NASD.

     "ORIGINAL REGISTRATION RIGHTS AGREEMENT" is defined in the first Whereas
clause.

     "PERSON" shall mean any natural individual or any Entity.

     "PROSPECTUS" shall mean each prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by the Registration Statement and by all other amendments and
supplements to the prospectus, including each preliminary prospectus and post-
effective amendments and all material incorporated by reference in such
prospectus.

     "REGISTRABLE SECURITIES" shall mean (a) all shares of Class A Common Stock
acquired by any of the Stockholders (i) pursuant to any of the Equity
Agreements, or (ii) directly or indirectly through one or more such conversions
or exchanges, upon the exercise of conversion or exchange provisions set forth
in other securities of ATC issued pursuant to the provisions of any of the
Equity Agreements, or pursuant to the redemption or repurchase of any such
securities, and (b) all shares of Common Stock of whatever series or class or
other equity securities of ATC derived from the Registrable Securities, whether
as a result of merger, consolidation, stock split, stock dividend, stock
distribution, stock combination, recapitalization or similar event.

     "REGISTRATION EXPENSES" shall mean all (or where appropriate any one or
more) of the following:

          (a)  all registration, filing and listing fees;

          (b)  fees and expenses of compliance with securities or blue sky laws
     (including without limitation reasonable fees and disbursements of counsel
     for the underwriters or selling holders in connection with blue sky and
     state securities qualifications of the Registrable Securities under the
     laws of such jurisdictions as the managing underwriters or the holders of
     not less than a majority in value (based on the proposed public offering
     price) of the Registrable Securities being sold may designate);

          (c)  printing (including without limitation expenses of printing or
     engraving certificates for the Registrable Securities in a form eligible
     for deposit with Depositary Trust Company and otherwise meeting the
     requirements of any securities exchange on which they are listed and of
     printing Prospectuses), word processing, messenger, telephone and delivery
     expenses;

          (d)  fees and disbursements of counsel for ATC, and reasonable fees
     and disbursements of counsel for the underwriters and for the selling
     holders of the Registrable Securities in accordance with the provisions of
     Section 1(c)(xiv) (subject to any provisions to the contrary in this
     Agreement);

          (e)  fees and disbursements of all independent public accountants of
     ATC (including without limitation the expenses of any annual or special
     audit and "cold comfort" letters required by the provisions of this
     Agreement);

          (f)  fees and disbursements of underwriters (excluding discounts,
     commissions or fees of underwriters), selling brokers, dealer managers or
     similar securities industry professionals



                                     -18-


     relating to the distribution of the Registrable Securities or legal
     expenses of any Person other than ATC, the underwriters and the selling
     holders;

          (g)  securities act liability insurance if ATC so desires or if the
     underwriters or the holders of not less than a majority in value (based on
     the proposed public offering price) of the Registrable Securities being
     sold so require;

          (h)  fees and expenses of other Persons, including any experts,
     retained by ATC;

          (i)  fees and expenses incurred in connection with the listing of the
     Registrable Securities on each securities exchange on which securities of
     the same class are then listed;

          (j)  fees and expenses associated with any NASD filing required to be
     made in connection with any Registration Statement, including, if
     applicable, the fees and expenses of any "qualified independent
     underwriter" (and its counsel) that is required to be retained in
     accordance with the rules and regulations of the NASD;

          (k)  ATC's internal expenses (including without limitation all
     salaries and expenses of its officers and employees performing legal or
     accounting duties); and

          (l)  all other costs and expenses normally associated with the
     issuance and sale of newly issued public securities.

     "REGISTRATION STATEMENT" shall mean any registration statement of ATC which
covers Registrable Securities pursuant to the provisions of this Agreement,
including the Prospectus, amendments, including post-effective amendments to
such registration statement, and supplements to such Prospectus and all exhibits
and all material incorporated by reference in such registration statement.

     "SECURITIES ACT" shall mean the Securities Act of 1933, and the rules and
regulations of the Commission thereunder, all as from time to time in effect, or
any successor law, rules or regulations, and any reference to any statutory or
regulatory provision shall be deemed to be a reference to any successor
statutory or regulatory provision.

     "SIGNIFICANT STOCKHOLDER" shall mean any Stockholder, or group of
Stockholders acting together, which owns not less than the following percentage
or amount of Common Stock:

          (a)  if ATC is not then subject to Section 13 or 15(d) of the Exchange
     Act, (i) shares of Common Stock with a market value (based on the proposed
     public offering price if the Common Stock is not, at the time, publicly
     traded) of not less than $25,000,000, or (ii) 15.38% of the outstanding
     shares of Common Stock (on a fully diluted basis);

          (b)  if ATC is then so subject to Section 13 or 15(d) of the Exchange
     Act, shares of Common Stock with a market value of not less than
     $10,000,000; provided, however, that notwithstanding the foregoing, in the
     event ATC is, at the time of any request made pursuant to the provisions of
     Section 1(b), eligible to file a Registration Statement on Form S-3 (or any
     successor form) with respect to the proposed disposition of the Registrable
     Securities with respect to which such request has been made, and such form
     is acceptable to the holders making such request, the minimum market value
     of the Registrable Securities shall be not less than $5,000,000; and


                                     -19-


          (c)  J. Michael Gearon, Jr. so long as he holds not less than fifty
     percent (50%) of the shares of Registrable Securities received by him
     pursuant to the consummation of the Gearon Agreement and proposes to
     register shares of Registrable Securities with a market value of not less
     than $10,000,000.

     "STOCKHOLDERS" shall mean those persons who executed this Agreement or who
hereafter become parties to this Agreement by executing a counterpart hereof,
and is further defined in Section 12(a).

     "SUBSIDIARY" shall mean, with respect to any Person, any Entity a majority
of the capital stock ordinarily entitled to vote for the election of directors,
or if no such voting stock is outstanding a majority of the equity interests, of
which is owned directly or indirectly by such Person or any Subsidiary of such
Person.

     12.  Miscellaneous.
          -------------

     (a)  Assignment; Successors and Assigns.  In the event that ATC shall be
merged with, or consolidated into, any other Entity or in the event that it
shall sell and transfer substantially all of its assets to another Entity, the
terms of this Agreement shall inure to the benefit of, and be assumed by, the
Entity resulting from such merger or consolidation, or to which ATC's assets
shall be sold and transferred.  Anything in this Agreement to the contrary
notwithstanding, the term "Stockholders" as used in this Agreement shall be
deemed to include the holders from time to time of any of the Registrable
Securities, whether or not they become parties to this Agreement, except for
holders who have acquired Registrable Securities in connection with an offering
registered under the Securities Act or pursuant to sales made in accordance with
Rule 144 (or any successor rule or regulation or statute in substitution
therefor).  The rights to cause ATC to register Registrable Securities pursuant
to Section 1 may be assigned in connection with any transfer or assignment by a
holder of Registrable Securities; provided, however, that (i) such transfer may
otherwise be effected in accordance with applicable securities laws and (ii)
such transfer is effected in compliance with the restrictions on transfer
contained in any agreement between ATC and such holder.  ATC's obligations under
this Agreement shall not be assigned, and its duties under this Agreement shall
not be delegated, except as provided in the first sentence of this Section.
Nothing in this Agreement expressed or implied is intended to and shall not be
construed to confer upon or create in any Person (other than the parties hereto
and their permitted successors and assigns) any rights or remedies under or by
reason of this Agreement, including without limitation any rights to enforce
this Agreement.

     (b)  Specific Performance; Other Rights and Remedies.  Each party
recognizes and agrees that the other parties' remedies at law for any breach of
the provisions of this Agreement would be inadequate and agrees that for breach
of such provisions, each such party shall, in addition to such other remedies as
may be available to it at law or in equity or as provided in this Agreement, be
entitled to injunctive relief and to enforce its rights by an action for
specific performance to the extent permitted by Law. Each party hereby waives
any requirement for security or the posting of any bond or other surety in
connection with any temporary or permanent award of injunctive, mandatory or
other equitable relief. Nothing herein contained shall be construed as
prohibiting any party from pursuing any other remedies available to it for such
breach or threatened breach, including without limitation the recovery of
damages.

     (c)  Expenses.  Each party shall pay its own expenses incident to the
negotiation, preparation, performance and enforcement of this Agreement
(including all fees and expenses of its counsel, accountants and other
consultants, advisors and representatives for all activities of such persons
undertaken pursuant to this Agreement), except to the extent otherwise
specifically set forth in this Agreement.


                                     -20-


     (d)  Entire Agreement.  This Agreement constitutes the entire agreement
among the parties with respect to the subject matter hereof and supersedes all
prior agreements, arrangements, covenants, promises, conditions, understandings,
inducements, representations and negotiations, expressed or implied, oral or
written, among them as to such subject matter.

     (e)  Waivers; Amendments.  Notwithstanding anything in this Agreement to
the contrary, amendments to and modifications of this Agreement may be made,
required consents and approvals may be granted, compliance with any term,
covenant, agreement, condition or other provision set forth herein may be
omitted or waived, either generally or in a particular instance and either
retroactively or prospectively with, but only with, the written consent of ATC
(to the extent it is entitled to the benefit thereof) and (i) with respect to
the rights of the Stockholders set forth in Section 1(b), including without
limitation the definition of Significant Stockholder (except with respect to
clause (c) of the definition of Significant Stockholder which cannot be amended
or modified without the prior written consent of J. Michael Gearon, Jr., or his
respective successors or assigns), two-thirds (2/3) in interest of the
Stockholders, and (ii) with respect to all other rights and obligations of the
Stockholders, a majority in interest of the Stockholders (to the extent they are
entitled to the benefit thereof or obligated thereby); provided, however, that
(x) in the event any such amendment, modification, consent, approval or waiver
shall be for the benefit of or materially adverse to less than all of the
Stockholders, such amendment, modification, consent, approval or waiver shall
require a majority in interest of those Stockholders who are not so benefitted
or who are so materially adversely affected and (y) ATC may from time to time
amend this Agreement solely to add Stockholders to this Agreement, subject only
to the approval of the Board of Directors in accordance with Section 6.

     (f)  Notices.  All notices and other communications which by any provision
of this Agreement are required or permitted to be given shall be given in
writing and shall be (a) mailed by first-class or express mail, postage prepaid,
(b) sent by telex, telegram, telecopy or other form of rapid transmission,
confirmed by mailing (by first class or express mail, postage prepaid) written
confirmation at substantially the same time as such rapid transmission, or (c)
personally delivered to the receiving party (which if other than an individual
shall be an officer or other responsible party of the receiving party).  All
such notices and communications shall be mailed, sent or delivered as follows:

     If to American Tower Corporation, at

               116 Huntington Avenue
               Boston, MA 02116
               Attention: Steven B. Dodge, Chairman of the Board and Chief
                          Executive Officer
               Facsimile: (617) 375-7575

          with a copy to:

               Sullivan & Worcester LLP
               One Post Office Square
               Boston, MA  02109
               Attention:  Norman A. Bikales, Esq.
               Facsimile:  (617) 338-2880

     If to any Stockholder, at his address as it appears on the stock records of
     ATC, and/or to such other person(s), telex or facsimile number(s) or
     address(es) as the party to receive any such communication or notice may
     have designated by written notice to the other parties.


                                     -21-


     (g) Severability.  If any provision of this Agreement shall be held or
deemed to be, or shall in fact be, invalid, inoperative, illegal or
unenforceable as applied to any particular case in any jurisdiction or
jurisdictions, or in all jurisdictions or in all cases, because of the
conflicting of any provision with any constitution or statute or rule of public
policy or for any other reason, such circumstance shall not have the effect of
rendering the provision or provisions in question invalid, inoperative, illegal
or unenforceable in any other jurisdiction or in any other case or circumstance
or of rendering any other provision or provisions herein contained invalid,
inoperative, illegal or unenforceable to the extent that such other provisions
are not themselves actually in conflict with such constitution, statute or rule
of public policy, but this Agreement shall be reformed and construed in any such
jurisdiction or case as if such invalid, inoperative, illegal or unenforceable
provision had never been contained herein and such provision reformed so that it
would be valid, operative and enforceable to the maximum extent permitted in
such jurisdiction or in such case, except when such reformation and construction
could operate as an undue hardship on either party, or constitute a substantial
deviation from the general intent and purpose of such party as reflected in this
Agreement.  The parties shall endeavor in good faith negotiations to replace the
invalid, inoperative, illegal or unenforceable provisions with valid, operative,
legal and enforceable provisions the economic effect of which comes as close as
possible to that of the invalid, inoperative, illegal or unenforceable
provisions.

     (h) Counterparts.  This Agreement may be executed in several counterparts,
each of which shall be deemed an original, but all of which together shall
constitute one and the same instrument, binding upon all the parties hereto.  In
pleading or proving any provision of this Agreement, it shall not be necessary
to produce more than one of such counterparts.

     (i) Section Headings.  The headings contained in this Agreement are for
reference purposes only and shall not in any way affect the meaning or
interpretation of this Agreement.

     (j) Governing Law.  The validity, interpretation, construction and
performance of this Agreement shall be governed by the applicable laws of the
United States of America and the domestic substantive laws of the State of New
York without giving effect to any choice or conflict of laws provision or rule
that would cause the application of domestic substantive laws of any other
jurisdiction.

     (k) Further Acts.  Each party agrees that at any time, and from time to
time, before and after the consummation of the transactions contemplated by this
Agreement, it will do all such things and execute and deliver all such
agreements, assignments, instruments, other documents and assurances, as any
other party or its counsel reasonably deems necessary or desirable in order to
carry out the terms and conditions of this Agreement and the transactions
contemplated hereby or to facilitate the enjoyment of any of the rights created
hereby or to be created hereunder.



                                     -22-


     IN WITNESS WHEREOF, the parties have executed or caused to be executed
this Agreement as of February 25, 1999.

                      American Tower Corporation

                      By: _____________________________________
                          Name:  Steven B. Dodge
                          Title: Chairman of the Board and Chief Executive
                                 Officer


                      _________________________________________
                      Steven B. Dodge

                      Thomas S. Dodge Irrevocable Trust

                      By:______________________________________
                         Name:
                         Title:

                      Kristen A. Dodge Irrevocable Trust

                      By:______________________________________
                         Name:
                         Title:

                      Benjamin P. Dodge Irrevocable Trust

                      By:______________________________________
                         Name:
                         Title:

                      _________________________________________
                      Norman A. Bikales

                      _________________________________________
                      Alan L. Box

                      _________________________________________
                      Charlton H. Buckley


                      Chase Equity Associates, L.P.
                      By Chase Capital Partners, General Partner

                      By: _____________________________________
                          Name:  Arnold L. Chavkin
                          Title:  General Partner

                      _________________________________________
                      James S. Eisenstein

                      _________________________________________
                      Arthur C. Kellar

                      _________________________________________
                      Michael B. Milsom

                      _________________________________________
                      Steven J. Moskowitz

                      _________________________________________
                      Joseph L. Winn

                      _________________________________________
                      Thomas H. Stoner

                      Thomas H. Stoner and Bessemer Trust Company,
                      Trustees of Ruth H. Spencer Irrevocable Trust

                      By:______________________________________



                      Bessemer Trust Company, Trustee of
                      Thomas H. Stoner Irrevocable Trust,

                      By:______________________________________


                      _________________________________________
                      Katharine E. Stoner


                      _________________________________________
                      Ruth Rochelle Stoner


                      _________________________________________
                      Thomas Stoner, Jr.


                      _________________________________________
                      Theodore A. Stoner


                      _________________________________________
                      Katharine E. Stoner, Trustee of
                      Alden Ellsworth Stoner 30 Trust

                      _________________________________________
                      Katharine E. Stoner, Trustee of
                      Lavonne Elizabeth Ellsworth 21 Trust

                      Bessemer Trust Company, Trustee of
                      Alden Elizabeth Stoner 35 Trust

                      By:______________________________________
                         Name:
                         Title:

                      Katharine and Thomas Stoner Foundation

                      By:______________________________________
                         Name:
                         Title:

                      Thomas H. Stoner Charitable Remainder Unitrust
                      dated May 3, 1993

                      By:______________________________________
                         Name:
                         Title:


                      Gearon Stockholders:

                      _________________________________________
                       J. Michael Gearon, Jr.

                      The 1997 Gearon Family Trust

                      _________________________________________
                       By: J.  Michael Gearon, Sr., Trustee


                      _________________________________________
                       Dan King Brainard


                      _________________________________________
                       Jeff Ebihara


                      _________________________________________
                       Doug Wiest


                      American Tower Corporation Stockholders:

                      _________________________________________
                      Fred R. Lummis

                      Clear Channel Communications, Inc.

                      By:______________________________________
                         Name:
                         Title:

                       Chase Manhattan Capital L.P.

                       By:_____________________________________
                           Name:  Arnold L. Chavkin
                           Title:  General Partner

                      The Spotted Dog Farm, L.P.

                      By:_____________________________________
                         General Partner

                      Webbmont Holdings, L.P.

                      By:_____________________________________
                         General Partner

                      _________________________________________
                      Jack D. Furst

                      Catherine Forgrave Hicks 1993 Trust

                      By:_______________________________________


                      John Alexander Hicks 1984 Trust


                      By:_______________________________________

                      Mack Hardin Hicks 1984 Trust*


                      By:_______________________________________


                      Robert Bradley Hicks 1984 Trust*

                      By:______________________________________


                      Thomas O. Hicks Jr. 1984 Trust*

                      By:______________________________________



                      _________________________________________

                      Thomas O. Hicks*

                      William Cree Hicks 1992 Trust*

                      By:______________________________________


                      HMTF/Omni Partners, L.P.*

                      By:  Hm3/Omni America Partners, LLC, its General Partner

                      By:_____________________________________
                         Daniel S. Druss
                         Vice President


                      _________________________________________
                      Dan H. Blanks*


                      _________________________________________
                      David R. Deniger*

                      The Melanie Levitt Trust 1996*

                      By:_________________________________________
                         Michael J. Levitt


                      _________________________________________
                      Michael J. Levitt*


                      The Stephen A. Levitt Trust 1996*

                      By:______________________________________
                         Michael J. Levitt

                      _________________________________________
                      John R. Muse*

                      _________________________________________
                      Lawrence D. Stuart, Jr.*

                      _________________________________________
                      Charles W. Tate*

                      Hicks, Muse, Tate & Furst Incorporated*

                      By:______________________________________



* Hicks, Muse, Tate & Furst Incorporated is hereby appointed as agent for this
signatory for purposes of this agreement.


                      Cox Telecom Towers, Inc.

                      By:______________________________________
                         Name:  Dean Eisner
                         Title: President

                      TeleCom Towers, Inc.

                      By:______________________________________
                         Name: Randall N. Smith
                         Title: Chairman and CEO


                         USEI Stockholders

                         ______________________________________
                         Name:  James A.R. Veeder

                         ______________________________________
                         Name:  Daniel E. Murphy

                         ______________________________________
                         Name:  Valrie L. Murphy

                         Veeder Family Trust

                         By:______________________________________
                            Name:  James A.R. Veeder
                            Title:  Trustee


                         Galaxy Engineering Services, Inc. Stockholders:



                         __________________________________________
                         Joseph Forbes

                         Moore Family Holdings, L.P.

                         By:___________________________________________
                            Name:
                            Title:

                         ___________________________________________
                         Paul Blaser


                         ___________________________________________
                         Drew Davis


                         ___________________________________________
                         Louis Roberts


                         __________________________________________
                         John Cody Sutherland


                         ___________________________________________
                         Colin Holland


                         ___________________________________________
                         Jim Bennett


                         Carl R. Moore Family Holdings Limited


                         By:________________________________________
                            Name:  Carl R. Moore
                            Title: Manager


                      EarleMost Investments, L.P.


                      By:______________________________________
                          Name:  Earle J. Bensing
                          Title: General Partner



                      _________________________________________
                      David Smartt

                      1999 Roy J. Moore II Trust


                      By:______________________________________
                         Carl Moore, as Trustee

                      1999 Brooke Moore Trust


                      By:______________________________________
                         Carl Moore, as Trustee

                      1999 Matthew Moore Trust


                      By:______________________________________
                         Carl Moore, as Trustee


                      _________________________________________
                      Joseph Forbes, as custodian for Julia
                      Marie Forbes pursuant to the U/G/M/A


                      _________________________________________
                      Joseph Forbes, as custodian for Jared
                      Joseph Forbes pursuant to the U/G/M/A


                      Kline Iron & Steel Co., Inc.

                      By:_______________________________________________
                          Name: Jerome C. Kline
                          Title: President

                      Kline Family Stockholders


                      ___________________________________________________
                      Jerome C. Kline



                      ___________________________________________________
                      Sue David Kline, Trustee for Jerome Carl Kline, Jr.



                      ___________________________________________________
                      Sue David Kline, Trustee for Amy Beth Kline



                      ___________________________________________________
                      Sue David Kline, Trustee for David Bernard Kline


IN WITNESS WHEREOF, the undersigned hereby executes the Agreement, and hereby
authorizes this signature page to be attached to a counterpart of such Agreement
executed by the other parties thereto.

                      AIRTOUCH COMMUNICATIONS, INC.,
                      a Delaware corporation

                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      AIRTOUCH CELLULAR,
                      a California corporation

                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Secretary


                      VODAFONE AIRTOUCH LICENSES LLC,
                      a Delaware limited liability company

                      By: Air Touch Communications, Inc.
                      Its Sole Member

                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      NEW PAR,
                      a Delaware general partnership

                      By: AirTouch Cellular, Inc.
                          A general partner

                      By: _____________________________________
                          Name: Gregory Caligari
                          Title: Secretary


                      COCONINO, ARIZONA RSA LIMITED PARTNERSHIP, an Arizona
                      limited partnership

                      By: AirTouch Communications, Inc.
                          A general partner

                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary

                      BOISE CITY MSA LIMTED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Communications, Inc.
                          as general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary



                      COLORADO RSA NO. 3 LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Communications, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary



                      YUMA, ARIZONA RSA LIMITED PARTNERSHIP, an Arizona limited
                      partnership


                      By:  AT Arizona II, LLC
                      Its: General Partner


                      By: Vodafone AirTouch Licenses LLC,
                      Its: Sole Member


                      By: AirTouch Communications, Inc.
                      Its: Sole Member


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      SPOKANE MSA LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Communications, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      OLYMPIA CELLULAR LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Communications, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary



                      SEATTLE SMSA LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Communications, Inc.
                          as general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      SACRAMENTO VALLEY LIMITED PARTNERSHIP,
                      a California limited partnership


                      By: AirTouch Cellular
                          as general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      OMAHA CELLULAR TELEPHONE COMPANY,
                      a New York general partnership


                      By: AirTouch Nebraska, Inc.,
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Secretary



                      DES MOINES MSA GENERAL PARTNERSHIP,
                      an Iowa general partnership


                      By: AirTouch Iowa, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Secretary



                      DULUTH MSA LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Minnesota, Inc.,
                          as general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Secretary



                      ATHENS CELLULAR, INC.,
                      a Delaware corporation


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      SPRINGFIELD CELLULAR TELEPHONE COMPANY,
                      an Ohio general partnership


                      By: New Par, a General Partnership,
                          as General Partner


                      By: AirTouch Cellular, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary


                      HAMILTON CELLULAR TELEPHONE COMPANY,
                      an Ohio general partnership


                      By: New Par, a General Partnership,
                          as General Partner


                      By: AirTouch Cellular, Inc.
                          A general partner


                      By: _____________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary



                      MUSKEGON CELLULAR PARTNERSHIP,
                      a District of Columbia general partnership


                      By: AirTouch Cellular of Michigan
                          A general partner


                      By: ______________________________________
                          Print Name: Gregory Caligari
                          Title: Assistant Secretary



                      WASATCH UTAH RSA 2 LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By: AirTouch Utah, Inc.
                          as general partner


                      By: ______________________________________
                          Print Name: Gregory Caligari
                          Title: Secretary


                      REDDING MSA LIMITED PARTNERSHIP,
                      a California limited partnership


                      By:  Sacramento Valley Limited Partnership,
                           a Limited Partnership,
                           A general partner


                      By:  AirTouch Cellular
                           as general partner


                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


                      RSA 7 Limited Partnership (IOWA),
                      an Iowa limited partnership


                      By: AirTouch Iowa RSA 7, Inc.
                          A general partner


                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


                      IDAHO RSA NO. 1 LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By:  AirTouch Communications, Inc.,
                           A general partner


                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


                      IDAHO RSA NO. 2 LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By:  AirTouch Idaho, Inc.,
                           as general partner


                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


                      IDAHO RSA 3 LIMITED PARTNERSHIP,
                      a Delaware limited partnership


                      By:  AirTouch Idaho, Inc.,
                           as general partner


                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary



                      MODOC RSA LIMITED PARTNERSHIP,
                      a California limited partnership


                      By:  AirTouch Cellular
                           as general partner

                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


                      GREAT SALT FLATS GENERAL PARTNERSHIP,
                      an Utah general partnership


                      By: AirTouch Utah, Inc.
                          A general partner

                      By:______________________________________
                         Print Name: Gregory Caligari
                         Title: Secretary


IN WITNESS WHEREOF, the undersigned hereby executes the Amended and Restated
Registration Rights Agreement, and hereby authorizes this signature page to be
attached to a counterpart of such Agreement executed by the other parties
thereto.


                      Publicom Stockholders


                      _____________________________________
                      Name: Ana M. Diaz

                      Sheridan Dickinson Revocable Trust

                      By:__________________________________
                         Name:  Sheridan Dickinson, Sr.
                         Title:  Trustee

                      _____________________________________
                      Name:  Sheridan Dickinson, Jr.

                      _____________________________________
                      Name:  Julian Gonzalez

                      _____________________________________
                      Name:  Jaime Dickinson


American Tower Corporation hereby
acknowledges and consents to the Publicom
Stockholders identified above becoming
parties as Stockholders to the Amended and
Restated Registration Rights Agreement


AMERICAN TOWER CORPORATION


By:_________________________
   Name: Michael B. Milsom
   Title: Vice President


IN WITNESS WHEREOF, the undersigned hereby executes the Amended and Restated
Registration Rights Agreement, and hereby authorizes this signature page to be
attached to a counterpart of such Agreement executed by the other parties
thereto.

                                  Tower Ventures, Inc. stockholders



                                  ____________________________________
                                  William P. Collatos



                                  ____________________________________
                                  Joseph V. Gallagher



                                  ____________________________________
                                  Robert J. Maccini



                                  ____________________________________
                                  C. Kevin Landry


                                  The Applegate Family Trust



                                  ____________________________________
                                  By: Brion B. Applegate
                                  Title: Trustee



                                  ____________________________________
                                  Linda C. Wisnewski



                                  ____________________________________
                                  Kristen S. Maccini


American Tower Corporation hereby acknowledges and consents to the Tower
Ventures stockholders identified above becoming parties as Stockholders to the
Amended and Restated Registration Rights Agreement


AMERICAN TOWER CORPORATION


By:
    ______________________
    Name:  Ross W. Elder
    Title: Vice President


IN WITNESS WHEREOF, the undersigned hereby executes the Agreement, and hereby
authorizes this signature page to be attached to a counterpart of such Agreement
executed by the other parties thereto.


                              Flash Stockholder


                              ____________________________________
                              Name: William F. Somers



American Tower Corporation hereby
acknowledges and consents to the Flash
Stockholder identified above becoming
a party as Stockholder to the Amended and
Restated Registration Rights Agreement


AMERICAN TOWER CORPORATION


By:
    _____________________________
    Name:  Justin D. Benincasa
    Title:  Senior Vice President


IN WITNESS WHEREOF, the undersigned hereby executes the Agreement, and hereby
authorizes this signature page to be attached to a counterpart of such Agreement
executed by the other parties thereto.


                              Modern Stockholder


                              _____________________________
                              Name: William F. Somers



American Tower Corporation hereby
acknowledges and consents to the Modern
Stockholder identified above becoming
a party as Stockholder to the Amended and
Restated Registration Rights Agreement


AMERICAN TOWER CORPORATION


By:
    _____________________________
    Name:  Justin D. Benincasa
    Title:  Senior Vice President


IN WITNESS WHEREOF, the undersigned hereby executes the Amended and Restated
Registration Rights Agreement, and hereby authorizes this signature page to be
attached to a counterpart of such Agreement executed by the other parties
thereto.

                                  Vancomm, Inc. stockholders



                                  ____________________________________
                                  Jerry Glaser



                                  ____________________________________
                                  Michael Moskowitz



                                  ____________________________________
                                  Paul Papay



                                  ____________________________________
                                  Peter Papay


American Tower Corporation hereby
acknowledges and consents to the Vancomm,
Inc. stockholders identified above becoming
a party as Stockholders to the Amended and
Restated Registration Rights Agreement


AMERICAN TOWER CORPORATION


By:_____________________________
   Name:  Justin D. Benincasa
   Title:  Senior Vice President


IN WITNESS WHEREOF, the undersigned hereby execute the Amended and Restated
Registration Rights Agreement, and hereby authorizes this signature page to be
attached to a counterpart of such Agreement  executed by the other parties
thereto.


                    ________________________________________________
                    Access Technology Partners, L.P.

                    ________________________________________________
                    Access Technology Partners Brokers Fund, L.P.

                    ________________________________________________
                    Joseph T. Arsenio II

                    ________________________________________________
                    Jeffrey Barbakow

                    ________________________________________________
                    BayStar Capital, L.P.

                    ________________________________________________
                    Bay Star International Ltd.

                    ________________________________________________
                    David & Annika Bernstein

                    ________________________________________________
                    Stanley & Charlotte Bernstein

                    ________________________________________________
                    Stephen & Gayle Bernstein

                    ________________________________________________
                    CBK Investments, G.P.

                    ________________________________________________
                    Hector Chao

                    ________________________________________________
                    Liz Chow

                    ________________________________________________
                    City National Bank, Trustee

                    ________________________________________________
                    David Vaun Crumly

                    ________________________________________________
                    Crumly Family Partners Limited

                    ________________________________________________
                    Richard d'Abo

                    ________________________________________________
                    Delaware Charter Guarantee & Trust Co.,
                    Cust. Joseph T. Arsenio II

                    ________________________________________________
                    Delaware Charter Guarantee & Trust Co.,
                    Cust. Joseph T. Arsenio II, IRA

                    ________________________________________________
                    Delaware Charter Guarantee & Trust Co.,
                    Cust. Joseph T. Arsenio II, IRA Rollover

                    ________________________________________________
                    Delaware Charter Guarantee & Trust Co.,
                    Cust. Joseph T. Arsenio II, IRA SEP

                    ________________________________________________
                    Andrew & Donna Dietz

                    ________________________________________________
                    Irene B. Dorsey

                    ________________________________________________
                    Evergreen Trust, U/A/D 6-12-90

                    ________________________________________________
                    Bruce and Patricia Fisher

                    ________________________________________________
                    Jonathan Gans

                    ________________________________________________
                    Rock Steven Gnatovich

                    ________________________________________________
                    David Golden

                    ________________________________________________
                    Howard Goldman

                    ________________________________________________
                    Gotel Investments Ltd.

                    ________________________________________________
                    Bruce J. Greenbaum & Teri Greenbaum,
                    Trustees

                    ________________________________________________
                    Ruth Greenbaum & Monroe A. Greenbaum, Trustees

                    ________________________________________________
                    Scott D. & Susan B. Greenbaum

                    ________________________________________________
                    Eliezer A. Gurfel III

                    ________________________________________________
                    Barry L. Guterman and Sheryl L. Guterman,
                    Co-Trustees

                    ________________________________________________
                    Ken Halloway

                    ________________________________________________
                    Hambrecht & Quist California

                    ________________________________________________
                    Hambrecht & Quist Employee Venture
                    Fund L.P. II

                    ________________________________________________
                    Terry Hanson

                    ________________________________________________
                    Peter Hartz, Trustee U/A dtd 9/20/90 by
                    Hartz Revocable Trust

                    ________________________________________________
                    Carl Hirsch

                    ________________________________________________
                    Intel Corporation

                    ________________________________________________
                    Charles Isgar

                    ________________________________________________
                    Yolanta Jakubiec

                    ________________________________________________
                    June Investments, LLC

                    ________________________________________________
                    Kinda Associates, a Massachusetts General
                    Partnership

                    ________________________________________________
                    James Koisrud

                    ________________________________________________
                    James Koisrud & Sookhi Ro

                    ________________________________________________
                    Donald J. Kula

                    ________________________________________________
                    Mike Labriola

                    ________________________________________________
                    Evelyn Lee

                    ________________________________________________
                    Sandra J. Levin

                    ________________________________________________
                    James and Linda Lippman 1989 Trust:
                    James Lippman

                    ________________________________________________
                    Max Loubiere

                    ________________________________________________
                    Jon Mansey

                    ________________________________________________
                    Steve Meepos

                    ________________________________________________
                    Brett Messing

                    ________________________________________________
                    Brian Messing

                    ________________________________________________
                    Brian and Sandy Messing

                    ________________________________________________
                    Debra Messing

                    ________________________________________________
                    Natalie Messing, UGMA, Brett Messing,
                    Custodian

                    ________________________________________________
                    Samantha Messing, UGMA, Brett Messing,
                    Custodian

                    ________________________________________________
                    Steven J. Miller

                    ________________________________________________
                    Carlos Moran

                    ________________________________________________
                    Chris Mulhern

                    ________________________________________________
                    Mia Mulhern

                    ________________________________________________
                    Tom Mulhern

                    ________________________________________________
                    Michael Nesmith

                    ________________________________________________
                    Newberg Family Trust dated 12-18-90

                    ________________________________________________
                    Barry Newburger

                    ________________________________________________
                    Mira Nikolic

                    ________________________________________________
                    Norman Pattiz, Trustee, Pattiz Family Trust

                    ________________________________________________
                    Philip Michael Nunez & Debora Weston Nunez

                    ________________________________________________
                    Alyssa Pearlstein, UGMA, David Pearlstein,
                    Custodian

                    ________________________________________________
                    David and Gina Pearlstein

                    ________________________________________________
                    Nicole Pearlstein, UGMA, David
                    Pearlstein, Custodian

                    ________________________________________________
                    Sonny Pearlstein

                    ________________________________________________
                    Sonny and Marsha Pearlstein

                    ________________________________________________
                    Zachary Pearlstein, UGMA, David Pearlstein,
                    Custodian

                    ________________________________________________
                    Jim Petit

                    ________________________________________________
                    Pequot Private Equity Fund II, L.P.

                    ________________________________________________
                    R&M Interpacket Investors, G.P.

                    ________________________________________________
                    Bruce Raben

                    ________________________________________________
                    Josh Rafner

                    ________________________________________________
                    Mitchell S. Rosenzweig

                    ________________________________________________
                    Alan Rothenberg

                    ________________________________________________
                    Mark Rubin

                    ________________________________________________
                    Allen Sciarillo

                    ________________________________________________
                    Robert Schiowitz

                    ________________________________________________
                    The Sear Family Trust

                    ________________________________________________
                    Lori Segaux

                    ________________________________________________
                    Michael J. Shepard

                    ________________________________________________
                    Steven & Janine Simenhoff

                    ________________________________________________
                    Julie Spira, as Trustee, The Julia Spira Inter
                    Vivos Trust dated June 22, 2000

                    ________________________________________________
                    Jeffrey Sudikoff

                    ________________________________________________
                    Timothy F. Sylvester

                    ________________________________________________
                    George & Lenore Travis

                    ________________________________________________
                    Bruce Tyson, Trustee for Evergreen Trust,
                    U/A/D 6-12-90

                    ________________________________________________
                    Juliana Long Tyson, UGMA Bruce Tyson,
                    Custodian

                    ________________________________________________
                    VF Family Partnership

                    ________________________________________________
                    Paul Vogel

                    ________________________________________________
                    Gary Vollen

                    ________________________________________________
                    W2 Ventures Partners, LLC

                    ________________________________________________
                    Alan E. & Stephanie C. Weston, Trustees

                    ________________________________________________
                    Craig E. Weston

                    ________________________________________________
                    Rodney & Judith Williams

                    ________________________________________________
                    William Wisniewski

                    ________________________________________________
                    Bob Wotherspoon

                    ________________________________________________
                    John Yona

                    ________________________________________________
                    Loveday Ziluca

                    ________________________________________________
                    Kenneth H. Zimble

                    ________________________________________________
                    Lisa Zimble

                    ________________________________________________
                    Oliver Zimble, UGMA, Peter Zimble,
                    Custodian

                    ________________________________________________
                    Patricia E. Cohen Zimble Trust

                    ________________________________________________
                    Peter Zimble

                    ________________________________________________
                    Shari Zimble



American Tower Corporation hereby
acknowledges and consents to the above
named holders of InterPacket Stock
becoming a party as a Stockholder to the
Amended and Restated Registration Rights
Agreement

AMERICAN TOWER CORPORATION

By:______________________________
   Authorized Officer:



IN WITNESS WHEREOF, the undersigned hereby execute the Agreement, and hereby
authorize this signature page to be attached to a counterpart of such Agreement
executed by the other parties thereto.


                    By:________________________
                       Name: Joseph J. Catapano





                    By:________________________
                       Name: Joseph P. Catapano




American Tower Corporation hereby
acknowledges and consents to each
individual listed above becoming a
party as Stockholder to the Amended
and Restated Registration Rights
Agreement

AMERICAN TOWER CORPORATION


By:____________________________
   Name: Justin D. Benincasa
   Title: Senior Vice President


IN WITNESS WHEREOF, the undersigned hereby execute the Agreement, and hereby
authorize this signature page to be attached to a counterpart of each Agreement
executed by the other parties thereto.

                                        By:
                                           ------------------------------
                                           Name: David Fields



American Tower Corporation hereby
acknowledges and consents to each
individual listed above becoming a party as
Stockholder to the Amended and Restated
Registration Rights Agreement

AMERICAN TOWER CORPORATION

By:
    ------------------------------------
    Name:
    Title:






                                                                    Exhibit 10.8

                              SIXTH AMENDMENT TO
                      AMENDED AND RESTATED LOAN AGREEMENT

     THIS SIXTH  AMENDMENT TO AMENDED AND RESTATED LOAN  AGREEMENT,  dated as of
the 26th day of October, 2001 (this "Amendment"),  is made by and among AMERICAN
                                     ---------
TOWER, L.P., a Delaware limited  partnership,  AMERICAN TOWERS, INC., a Delaware
corporation, VERESTAR, INC. (f/k/a ATC TELEPORTS, INC.), a Delaware corporation,
and TOWERSITES  MONITORING,  INC., a Delaware  corporation,  (collectively,  the
"Borrowers"), THE FINANCIAL INSTITUTIONS SIGNATORIES HERETO and TORONTO DOMINION
 ---------
(TEXAS),  INC., as administrative  agent (in such capacity,  the "Administrative
                                                                  --------------
Agent").
- -----

                             W I T N E S S E T H:
                             - - - - - - - - - -

     WHEREAS, the Borrowers, the Lenders (as defined therein), the Issuing Bank
(as defined therein) and the Administrative Agent are all parties to that
certain Amended and Restated Loan Agreement dated as of January 6, 2000 (as
previously amended and as hereafter amended, modified, restated and supplemented
from time to time, the "Loan Agreement"); and
                        --------------

     WHEREAS, the Borrowers have requested amendments to certain provisions of
the Loan Agreement, and, subject to the terms and conditions set forth herein,
the Lenders and the Administrative Agent are willing to amend certain provisions
of the Loan Agreement as more specifically set forth herein;

     NOW, THEREFORE, in consideration of the premises set forth above, and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree that all capitalized terms used
and not defined herein shall have the meanings ascribed to such terms in the
Loan Agreement, and further hereby agree as follows:

     1.       Amendments.  The Loan Agreement is hereby amended as more
              ----------
fully set for the below:

              (a)      Amendments to Article 1.
                       -----------------------

                              (i) Section 1.1 of the Loan Agreement,
          Definitions, is hereby amended by deleting the definitions of
          -----------
          "Annualized Operating Cash Flow", "ATC International" "Borrowers",
           ------------------------------    -----------------   ---------
          "Change of Control" "Pro Forma Debt Service" and "Restricted
           -----------------   ----------------------       ----------
          Subsidiaries" in their entirety and by substituting the following
          ------------
          definitions in lieu thereof:

                       " 'Annualized Operating Cash Flow' shall mean, as of
                          ------------------------------
                  any calculation date, in each case on a consolidated basis,
                  (a) the sum of (i) the product of (A) Operating Cash Flow
                  (Mature Towers) for the fiscal quarter-end being tested, or


                  the most recently completed fiscal quarter immediately
                  preceding such calculation date, as the case may be, times (B)
                                                                       -----
                  four (4); and (ii) the product of (A) Operating Cash Flow
                  (Developing Towers) for the fiscal quarter-end being tested,
                  or the most recently completed fiscal quarter immediately
                  preceding such calculation date, as the case may be, times (B)
                                                                       -----
                  four (4); and (iii) Operating Cash Flow (Other Business) for
                  the four fiscal quarter period end being tested or the most
                  recently completed four (4) fiscal quarter period immediately
                  preceding such calculation date, as the case may be; minus (b)
                                                                       -----
                  corporate overhead (exclusive of amortization and
                  depreciation) of the Borrowers and the Restricted Subsidiaries
                  for the four (4) fiscal quarter period then ended or, the most
                  recently completed four (4) fiscal quarter period immediately
                  preceding the calculation date, as the case may be; provided,
                                                                      --------
                  however, that for purposes of calculating the Leverage Ratio
                  -------
                  only, (I) item (a) above shall not include the amount by which
                  the product of (x) Operating Cash Flow (without deductions for
                  corporate overhead) attributable to Restricted Subsidiaries
                  located in or doing business in Brazil and Mexico (or such
                  other countries as the Majority Lenders approve) times (y)
                  four (4) exceeds ten percent (10%) of the total amount
                  determined by clause (a) of this definition (before giving
                  effect to the deduction set forth in clause (II) immediately
                  following), and (II) item (a)(iii) above shall be reduced by
                  twenty-five percent (25%)."

                       " 'ATC International' shall mean American Tower
                          -----------------
                  International, Inc., a Delaware corporation."

                       "'Borrowers' shall mean, collectively, AT L.P., AT Inc.,
                         ---------
                  Verestar, Inc. (f/k/a ATC Teleports), Towersites Monitoring,
                  Inc., a Delaware corporation, and ATC International, and shall
                  include such other Persons as may be approved by the Majority
                  Lenders at such time as any such Person executes and delivers
                  to the Administrative Agent an assignment and assumption
                  agreement in form and substance satisfactory to the
                  Administrative Agent and each other Loan Document as executed
                  by the other Borrowers; and "Borrower" shall mean any one of
                                               --------
                  the foregoing."

                       " 'Change of Control' shall mean (a) the failure of the
                          -----------------
                  Parent to own, directly or indirectly, one hundred percent
                  (100%) of the ownership interests of each of the Borrowers,
                  except for Verestar, of which the Parent must own ninety
                  percent (90%), provided that the remaining ten percent (10%)
                                 --------
                  of Verestar is held by other Persons in connection with an
                  employee stock option plan, (b) the failure of AT Inc. to own,
                  directly or indirectly, one hundred percent (100%) of the
                  ownership interests of ATC Operating (unless ATC Operating is
                  merged with or into AT Inc.), (c) the sale, lease, transfer,
                  in one or a series of related transactions, of all or
                  substantially all of any of the Borrower's assets to any
                  Person or group (as such term is used in Section 13(d)(3) of
                  the Exchange Act) other than to the other Borrowers or any
                  wholly-owned direct or indirect Restricted Subsidiary of AT
                  Inc., (d) the adoption of a plan relating to the liquidation
                  or dissolution of the

                                      -2-


                  Parent, (e) the acquisition, directly or indirectly, by any
                  Person or group (as such term is used in Section 13(d)(3) of
                  the Exchange Act) of forty percent (40%) or more of the voting
                  power of the voting stock of the Parent by way of merger or
                  consolidation or otherwise and such Persons own more voting
                  power than the Principal Shareholders, or (f) the Continuing
                  Directors cease for any reason to constitute a majority of the
                  directors of the Parent then in office."

                       " 'Pro Forma Debt Service' shall mean with respect to the
                          ----------------------
                  twelve (12) calendar month period following the calculation
                  date, and after giving effect to any Interest Hedge Agreements
                  and LIBOR Advances, the sum of the amount of all of the
                  following with respect to the Borrowers and the Restricted
                  Subsidiaries, on a consolidated basis: (a) scheduled payments
                  of principal on Indebtedness for Money Borrowed (determined,
                  with respect to the Revolving Loans only, as the difference
                  between the outstanding principal amount of the Revolving
                  Loans and Letter of Credit Obligations on the calculation date
                  and the amount the Revolving Loan Commitments will be on the
                  last day of such period) for such period; (b) Interest Expense
                  for such period; (c) fees payable under this Agreement for
                  such period; (d) other payments payable by such Persons during
                  such period in respect of Indebtedness for Money Borrowed
                  (other than voluntary repayments); and (e) after the Interest
                  Reserve, the 2001 Interest Reserve and/or the 2002 Interest
                  Reserve, as applicable, has been applied in full pursuant to
                  the terms hereof, all Restricted Payments to be made by the
                  Borrowers to the Parent which will be necessary to make
                  interest payments on the (i) Convertible Notes and/or (ii)
                  Senior Notes due 2009 during such period. For purposes of this
                  definition, where interest payments for the twelve (12) month
                  period immediately succeeding the calculation date are not
                  fixed by way of Interest Hedge Agreements, LIBOR Advances, or
                  otherwise for the entire period, interest shall be calculated
                  on such Indebtedness for Money Borrowed for periods for which
                  interest payments are not so fixed at the lesser of (i) the
                  LIBOR Basis (based on the then current adjustment under
                  Section 2.3(f) hereof) for a LIBOR Advance having an Interest
                  Period of six (6) months as determined on the date of
                  calculation and (ii) the Base Rate Basis as in effect on the
                  date of calculation; provided, however, that if such LIBOR
                                       --------  -------
                  Basis cannot be determined in the reasonable opinion of the
                  Administrative Agent, such interest shall be calculated using
                  the Base Rate Basis as then in effect."

                       " 'Restricted Subsidiary' shall mean any Subsidiary of
                          ---------------------
                  any Borrower other than an Unrestricted Subsidiary which (a)
                  is organized under the laws of, or owns, operates, constructs,
                  or manages towers in the United States of America, Brazil or
                  Mexico, provided that such Subsidiary (i) is permitted to pay
                          --------
                  dividends, (ii) has no liens other than Permitted Liens and
                  (iii) that such Subsidiary becoming a Restricted Subsidiary
                  shall not cause a Default or Event of Default, or in such
                  other jurisdictions as the Majority Lenders may from time to
                  time approve by prior written consent; and (b) has complied
                  with the requirements of Section 5.13

                                      -3-


                  hereof (or delivered comparable documents to effect the
                  purpose of such Section 5.13). The Restricted Subsidiaries as
                  of the Agreement Date are as set forth on Schedule 2 attached
                                                            ----------
                  hereto.

                            (ii) Section 1.1 of the Loan Agreement, Definitions,
                                                                    -----------
          is hereby amended by inserting the new definitions of "2002 Interest
                                                                 -------------
          Reserve" and "Term Loan C Loans" in the proper alphabetical order:
          -------       -----------------

                       " '2002 Interest Reserve' shall mean an escrow account
                          ---------------------
                  pledged to the Lenders as collateral which is (a) maintained
                  by one of the Borrowers, (b) maintained with the
                  Administrative Agent on terms and conditions satisfactory to
                  the Administrative Agent, (c) established with cash proceeds
                  in an amount equal to $46,875,000.00 and (d) so long as no
                  Event of Default has occurred and is continuing, used to make
                  interest payments due in August 2002 on the Senior Notes due
                  2009."

                       " 'Term Loan C Loans' shall mean, collectively, the
                          -----------------
                  amounts advanced in connection with the Notice of Incremental
                  Facility Commitment for Term Loan C."

                  (b)  Amendments to Article 2.
                       -----------------------

                       (i) Section 2.7(b)(v) of the Loan Agreement, Sale of
          Capital Stock and Debt Instruments, is hereby amended by deleting such
          section in its entirety and substituting in lieu thereof the
          following:

                                "(v)    Sale of Capital Stock and Debt
                                        ------------------------------
                                        Instruments.
                                        -----------

                                 (A)    Capital Stock. At any time when there
                                        -------------
                  are Term Loan C Loans outstanding, on the Business Day
                  following the date of receipt by the Parent, any Borrower or
                  any Restricted Subsidiary of any net cash proceeds from the
                  sale of any Capital Stock by any of the Parent, any Borrower,
                  or any Restricted Subsidiary (other than (x) net proceeds in
                  an amount not to exceed $2,000,000.00 in the aggregate after
                  the Agreement Date from the sale or issuance of Capital Stock
                  in connection with any employee stock option plan of such
                  Person or (y) proceeds received from Capital Stock issued in
                  connection with an Acquisition permitted hereunder), the Term
                  Loan C Loans shall be repaid (or, if no Term Loan C Loans are
                  outstanding, the Term Loan C Loan commitment shall be
                  cancelled) by an amount equal to such net cash proceeds;
                  provided, however, that if such net cash proceeds are received
                  --------  -------
                  on or prior to April 30, 2002 and no Term Loan C Loans are
                  then outstanding, the Term Loan C Loan commitment shall be
                  cancelled by an amount equal to such net cash proceeds in
                  excess of $200,000,000.00, as more fully set forth in the
                  Notice of Incremental Facility Commitment dated as of October
                  26, 2001;

                                      -4-


                                 (B)    Debt Instruments. On the Business Day
                                        ----------------
                  following the date of receipt by the Parent, any Borrower or
                  any Restricted Subsidiary of (1) at any time when there are
                  Term Loan C Loans and/or Term Loan C Loan commitments
                  outstanding, any net cash proceeds from the issuance of any
                  public or private debt by any of the Borrowers, any of the
                  Restricted Subsidiaries or the Parent, the Term Loan C Loans
                  shall be repaid in an amount equal to such net cash proceeds
                  (or if no Term Loan C Loans are then outstanding, the Term
                  Loan C Loan commitment shall be reduced, as more fully set
                  forth in the Notice of Incremental Facility dated as of
                  October 26, 2001), and (2) at any time when there are no Term
                  Loan C Loans outstanding, any Capital Raise Proceeds, the
                  Loans shall be repaid in an amount equal to, in the aggregate,
                  the Capital Raise Proceeds (after deducting amounts applied to
                  Term Loan C Loans).

                                 (C)    Application of Proceeds. The amount of
                                        -----------------------
                  the Capital Raise Proceeds required to be repaid under Section
                  2.7(b)(v)(B)(2) shall be applied to the Loans then outstanding
                  on a pro rata basis. Accrued interest on the principal amount
                  of the Loans being prepaid pursuant to Section 2.7(b)(v) to
                  the date of such prepayment will be paid by the Borrowers
                  concurrently with such principal prepayment. All repayments
                  under this Section 2.7(b)(v) of each of the Term Loan A Loans
                  and the Term Loan B Loans shall be applied to the repayments
                  for such Loans in Section 2.7(b)(i) hereof in inverse order of
                  maturity. All repayments under this Section 2.7(b)(v) of the
                  Term Loan C Loans shall be applied to the repayments for such
                  Term Loan C Loans in inverse order of maturity.
                  Notwithstanding anything to the contrary in this Agreement, to
                  the extent that net cash proceeds from a sale of Capital Stock
                  and an issuance of public or private debt are received on the
                  same day, the net cash proceeds from the issuance of public or
                  private debt shall be applied to the Term Loan C Loans first,
                  up to 50% of the total amount of such issuance, including
                  amounts applied to the Term Loan C Loans, shall be deemed
                  Capital Raise Proceeds (unless specifically excluded in the
                  definition thereof), and any remaining Capital Raise Proceeds
                  shall then be used to repay the Loans (other than the Term
                  Loan C Loans) in accordance with Section 2.7(b)(v)(B). Any
                  amendments or waivers of this Section 2.7(b)(v) shall require
                  the approval of at least 50.1% of lenders holding Term Loan C
                  Loans and/or Term Loan C Loan commitments as well as the
                  approval of the Majority Lenders."

                           (ii) Section 2.15 of the Loan Agreement, Incremental
          Facility Advances, is hereby amended by adding new section 2.15(f) as
          set forth below:

                           "(f)  Notwithstanding anything to the contrary
                  herein, (i) the Term Loan C Loans may be refinanced in whole
                  or in part with other Incremental Facility Loans (each, a
                  "Replacement Term Loan C Loan"), which Replacement Term Loan C
                   ----------------------------
                  Loan shall not reduce the amount of the then available
                  remaining

                                      -5-


                  Incremental Facility Commitment, and (ii) to the extent the
                  Term Loan C Loans are repaid (or the commitment for such Term
                  Loan C Loans is cancelled in whole or in part) as a result of
                  the receipt by the Borrowers, the Restricted Subsidiaries or
                  the Parent of the net cash proceeds from (A) the sale of any
                  Capital Stock or (B) the issuance of any non-pari passu public
                  or private debt otherwise permitted under this Agreement, the
                  then available Incremental Facility Commitment will be
                  increased by an amount equal to such repayment (or commitment
                  cancellation)."

                  (b)      Amendments to Article 7.
                           -----------------------

                           (i) Section 7.6 of the Loan Agreement, Investments
                                                                  -----------
          and Acquisitions, is hereby amended by deleting subsection (b) thereof
          ----------------
          in its entirety and substituting in lieu thereof the following:

                           "(b)     so long as no Default then exists or would
                  be caused thereby, establish Unrestricted Subsidiaries and
                  make Investments in (i) such Unrestricted Subsidiaries (in
                  addition to Investments permitted under Section 7.6(e), (f)
                  and (g) hereof), (ii) [reserved] and (iii) Persons primarily
                  engaged in domestic and foreign communications tower and tower
                  related businesses in an aggregate amount, directly or
                  indirectly, provided that, giving effect to such additional
                              --------
                  Investment, the aggregate Net Investment Amount made pursuant
                  to the provisions of this Section 7.6(b) shall not exceed,
                  from and after the effective date of the Sixth Amendment to
                  Amended and Restated Loan Agreement, $300,000,000.00 at any
                  time; provided further that, in the case of Investments made
                        -------- -------
                  pursuant to clause (iii) of this Section 7.6(b), the Parent,
                  any Borrower or any of the Restricted Subsidiaries has
                  executed a binding acquisition, merger, lease/sublease or
                  management agreement with such Person;"

                           (ii) Section 7.6 of the Loan Agreement, Investments
                                                                   -----------
          and Acquisitions, is hereby amended by deleting subsection (f) thereof
          ----------------
          in its entirety and substituting in lieu thereof the following:

                           "(f)     [RESERVED]"

                           (iii) Section 7.7 of the Loan Agreement, Restricted
                                                                    ----------
          Payments, is hereby amended by deleting such section in its entirety
          --------
          and substituting in lieu thereof the following:

                           "Section 7.7 Restricted Payments. The Borrowers shall
                                        -------------------
                  not, and shall not permit any of the Restricted Subsidiaries
                  to, directly or indirectly declare or make any Restricted
                  Payment; provided, however, that so long as no Default or
                           --------  -------
                  Event of Default hereunder then exists or would be caused
                  thereby, the Borrowers may make, (a) subject to Section
                  2.7(b)(iv) hereof, cash distributions in an

                                      -6-


                  aggregate amount for all Borrowers not to exceed fifty percent
                  (50%) of Excess Cash Flow for the immediately preceding
                  calendar year, on or after April 15th of each calendar year
                  commencing on April 15, 2004; and (b) distributions to the
                  Parent to make scheduled principal and interest payments on
                  the Convertible Notes and the Senior Notes due 2009; provided,
                                                                       --------
                  however, that (x) all funds in the Interest Reserve shall have
                  -------
                  been used to make all interest payments on the Convertible
                  Notes due on or prior to October 15, 2001, (y) all funds in
                  the 2001 Interest Reserve shall have been used in full to make
                  all interest payments on the Senior Notes due 2009 due on or
                  prior to February 15, 2002 and (z) all funds in the 2002
                  Interest Reserve shall have been used to make all interest
                  payments on the Senior Notes due 2009 due in August 2002;
                  provided that any funds remaining in the 2001 Interest Reserve
                  --------
                  shall be used in full for such payments prior to using funds
                  in the 2002 Interest Reserve."

                           (iv) Section 7.8 of the Loan Agreement, Leverage
                                                                   --------
          Ratio, is hereby amended by deleting the table included in such
          -----
          section in its entirety and substituting in lieu thereof the following
          new table:

                  "Period                                                 Ratio
                   ------                                                 -----

                  Borrowing Base Termination Date
                  through December 31, 2001                        7.75 to 1.00

                  January 1, 2002 through
                  March 31, 2002                                   7.50 to 1.00

                  April 1, 2002 through
                  June 30, 2002                                    7.00 to 1.00

                  July 1, 2002 through
                  September 30, 2002                               6.75 to 1.00

                  October 1, 2002 through
                  March 31, 2003                                   6.50 to 1.00

                  April 1, 2003 through
                  September 30, 2003                               6.00 to 1.00

                  October 1, 2003 through
                  March 31, 2004                                   5.25 to 1.00

                  April 1, 2004 through
                  September 30, 2004                               4.75 to 1.00

                                      -7-


                  October 1, 2004 through
                  March 31, 2005                                   4.25 to 1.00

                  April 1, 2005 and thereafter                     4.00 to 1.00"


         2.  No Other Amendments. Except for the amendments set forth above, the
             -------------------
text of the Loan Agreement and all other Loan Documents shall remain unchanged
and in full force and effect. No amendment, waiver or consent by the
Administrative Agent, the Issuing Bank or the Lenders under the Loan Agreement
or any other Loan Document is granted or intended except as expressly set forth
herein, and the Administrative Agent, the Issuing Bank and the Lenders expressly
reserve the right to require strict compliance in all other respects (whether or
not in connection with any Requests for Advance). Except as set forth herein,
the amendments agreed to herein shall not constitute a modification of the Loan
Agreement or any of the other Loan Documents, or a course of dealing with the
Administrative Agent, the Issuing Bank and the Lenders at variance with the Loan
Agreement or any of the other Loan Documents, such as to require further notice
by the Administrative Agent, the Issuing Bank, the Lenders or the Majority
Lenders to require strict compliance with the terms of the Loan Agreement and
the other Loan Documents in the future.

         3.  Conditions Precedent.  The effectiveness of this Amendment is
             --------------------
subject to:

         (a) receipt by the Administrative Agent of the following:

             (i)      duly executed signature pages to this Amendment from the
             Majority Lenders;

             (ii)     a duly executed Security Agreement from American Tower
             International, Inc.;

             (iii)    a duly executed Pledge Agreement from American Tower
             International, Inc., pledging its interests in ATC Mexico Holding
             Corp., a Delaware corporation, and ATC South America Holding Corp.,
             a Delaware corporation;

             (iv)     a duly executed Assumption Agreement, in form and
             substance acceptable to the Administrative Agent, from American
             Tower International, Inc.;

             (v)      a loan certificate of American Tower International, Inc.,
             in substantially in the form of Exhibit V attached to the Loan
             Agreement, with all exhibits thereto;

             (vi)     UCC-1 financing statements signed by American Tower
             International, Inc. to be filed in the office of the Secretary of
             State of the State of Delaware; and

             (vii)   evidence that the 2002 Interest Reserve has been
             established;

                                      -8-


         (b)     payment from funds received from the Borrowers by the
Administrative Agent to each Lender approving this Amendment of an amendment fee
equal to three-sixteenths (3/16) of one percent of the amount of Term Loan A
Loans, Term Loan B Loans and Revolving Loan Commitments held by such Lender; and

         (c)     the representations and warranties contained in Article 4 of
the Loan Agreement and contained in the other Loan Documents remaining true and
correct as of the date hereof, both before and after giving effect to this
 Agreement, except to the extent previously fulfilled in accordance with the
terms of the Loan Agreement or such other Loan Document, as applicable, or to
 the extent relating specifically to the earlier date.  No Default or Event of
Default now exists or will be caused hereby.

          4.     Counterparts.  This Amendment may be executed in any number of
                 ------------
counterparts,  each of which  shall be  deemed to be an  original,  but all such
separate counterparts shall together constitute but one and the same instrument.

          5.     Governing Law. This Amendment shall be construed in accordance
                 -------------
with and governed by the laws of the State of New York.

          6.     Severability.  Any provision of this Amendment which is
                 ------------
prohibited or unenforceable shall be ineffective to the extent of such
prohibition or unenforceability without invalidating the remaining provisions
hereof in that jurisdiction or affecting the validity or enforceability of such
 provision in any other jurisdiction.


                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                      -9-


         IN WITNESS WHEREOF, the parties hereto have executed this Amendment or
caused it to be executed by their duly authorized officers, all as of the day
and year first above written.


BORROWERS:                              AMERICAN TOWER, L.P., a Delaware limited
                                        partnership

                                        By ATC GP INC., its General Partner


                                        By_____________________________________
                                          Name:  Joseph L. Winn
                                          Title:  Chief Financial Officer


                                        AMERICAN TOWERS, INC., a Delaware
                                        corporation


                                        By:____________________________________
                                           Name:  Joseph L. Winn
                                           Title:  Chief Financial Officer


                                        VERESTAR, INC., a Delaware corporation


                                        By_____________________________________
                                          Name:  Joseph L. Winn
                                          Title:  Chief Financial Officer


                                        TOWERSITES MONITORING, INC., a Delaware
                                        corporation


                                        By_____________________________________
                                          Name:  Joseph L. Winn
                                          Title:  Chief Financial Officer


Agreed to and Accepted by:

AMERICAN TOWER INTERNATIONAL, INC.,
a Delaware corporation, as a new borrower


By_______________________________
  Name:  Joseph L. Winn
  Title:  Chief Financial Officer



                                                                    Exhibit 10.9

                   NOTICE OF INCREMENTAL FACILITY COMMITMENT


     AMERICAN  TOWERS,  INC., a Delaware  corporation,  AMERICAN TOWER,  L.P., a
Delaware limited partnership, VERESTAR, INC., a Delaware corporation, TOWERSITES
MONITORING, INC., a Delaware corporation and AMERICAN TOWER INTERNATIONAL, INC.,
a Delaware corporation (collectively,  the "Borrowers"), in connection with that
                                            ---------
certain  Amended and Restated Loan Agreement  dated January 6, 2000 (as amended,
modified,  restated or supplemented  from time to time, the "Loan Agreement") by
                                                             --------------
and among the  Borrowers,  the  Lenders  signatory  thereto  (collectively,  the
"Lenders"),  the Issuing Bank (as defined therein) and Toronto Dominion (Texas),
 -------
Inc., as administrative  agent (the  "Administrative Agent"),  hereby certifies
                                      --------------------
that:

         1.    As of the date hereof, the Borrowers have obtained an agreement
to provide an Incremental Facility Commitment in the aggregate amount of two
hundred fifty million and no/100s dollars ($250,000,000.00) from the financial
institutions set forth in Schedule 1 attached hereto in such amounts as set
                          ----------
forth in Schedule 1 attached hereto (collectively, the "Term Loan C
         ----------                                     -----------
Commitments", and individually, a " Term Loan C Commitment"). Within thirty (30)
- -----------                         ----------------------
days from the date hereof, financial institutions may provide additional Term
Loan C Commitments provided that, (a) the aggregate amount of all Term Loan C
                   --------
Commitments will not exceed, in the aggregate, THREE HUNDRED MILLION AND NO/100s
DOLLARS ($300,000,000.00), (b) such financial institutions execute a
supplemental signature page to this notice, and (c) no financial institution's
existing Term Loan C Commitment shall be increased or decreased without such
financial institution's consent. At any time an additional Term Loan C
Commitment is provided within the thirty-day period, Schedule 1 hereto will be
modified accordingly and each financial institution's pro rata share of the Term
Loan C Commitment shall be modified accordingly. The terms for repayment of the
loans (the "Term Loan C Loans") made pursuant to the Term Loan C Commitment are
            -----------------
set forth on Schedule 2 attached hereto.
             ----------

         2.    All of the representations and warranties of the Borrowers made
under the Loan Agreement (including, without limitation, all representations and
warranties with respect to the Restricted Subsidiaries) are on the date hereof,
and will be as of the effective date of such Term Loan C Commitment, true and
correct in all material respects after giving effect to any update to
information provided to the Lenders in accordance with the Loan Agreement,
except to the extent previously fulfilled, to the extent subsequently
inapplicable or to the extent that such representations and warranties expressly
relate to an earlier date, in which case such representations and warranties
shall be true and correct on such earlier date.

         3.    There does not exist, on this date, and there will not exist
after giving effect to the Term Loan C Loans, any Default or Event of Default
under the Loan Agreement.

         4.    Set forth on Schedule 3 attached hereto are revised projections
                            ----------
which demonstrate the Borrowers' ability to timely repay the Loans, including
the Term Loan C Loans, and to


timely comply with the covenants contained in Sections 7.8, 7.9, 7.10 and 7.11
of the Loan Agreement.


         5.    The Lenders having Term Loan C Commitments (the "Term Loan C
                                                                -----------
Lenders") signatory hereto agree that, upon signature hereof, in their capacity
- -------
as Term Loan C Lenders, they are bound under the Loan Agreement, as modified by
the terms hereof, as "Lenders" (as defined therein).
                      -------

         6.    This Notice of Incremental Facility Commitment constitutes a Loan
Document. The Loan Agreement shall hereafter be deemed amended and modified as
necessary to incorporate the terms and conditions applicable to the Term Loan C
Commitment which is the subject of this Notice of Incremental Facility
Commitment. The parties hereto agree that the Term Loan C Loans shall be an
"Incremental Facility" as defined in the Loan Agreement.
 --------------------

         Capitalized terms used in this Notice of Incremental Facility
Commitment and not otherwise defined herein are used as defined in the Loan
Agreement.


                 [Remainder of Page Intentionally Left Blank]

                                       2


         IN WITNESS WHEREOF, the undersigned, acting through an Authorized
Signatory, has signed this Notice of Incremental Facility Commitment on the 26th
day of October, 2001.


BORROWERS:                     AMERICAN TOWERS, INC., a Delaware corporation


                               By:______________________________________________
                                  Name:  Joseph Winn
                                             Chief Financial Officer

                               AMERICAN TOWER, L.P., a Delaware limited
                               partnership

                               By ATC GP Inc., its General Partner


                               By:______________________________________________
                                  Name:  Joseph Winn
                                             Chief Financial Officer


                               VERESTAR, INC., a Delaware corporation


                               By:______________________________________________
                                  Name:  Joseph Winn
                                             Chief Financial Officer


                               TOWERSITES MONITORING, INC., a Delaware
                               corporation


                               By:______________________________________________
                                  Name:  Joseph Winn
                                             Chief Financial Officer

                               AMERICAN TOWER INTERNATIONAL, INC., a
                               Delaware corporation


                               By:______________________________________________
                                  Name:  Joseph Winn
                                             Chief Financial Officer

Affirmation of Guarantors: Each of the Guarantors listed on Schedule 3 attached
                                                            ----------
hereto, by affixing their signature hereto, affirm that the Term Loan C
constitutes an Obligation under the Loan Agreement and the other Loan Documents,
including the Guarantees and that all Collateral pledged by them continues to
secure all of the Obligations (including the Term Loan C Loans) of the
Borrowers, the Restricted Subsidiaries and any other Guarantors.


                               For each of the Guarantors listed on Schedule 3
                               attached hereto:


                               By:______________________________________________
                                  Name:  Joseph Winn
                                  Title:


LENDERS:                       TORONTO DOMINION (TEXAS), INC., as
                               Administrative Agent and as a Lender


                               By: ____________________________________________
                                   Name: ______________________________________
                                   Title: _____________________________________


                               THE CHASE MANHATTAN BANK, as a Lender


                               By: ____________________________________________
                                   Name: ______________________________________
                                   Title: _____________________________________


                               CREDIT SUISSE FIRST BOSTON, as Lender


                               By: ____________________________________________
                                   Name: ______________________________________
                                   Title: _____________________________________


                               By: ____________________________________________
                                   Name: ______________________________________
                                   Title: _____________________________________


                               GENERAL ELECTRIC CAPITAL CORPORATION, as a Lender


                               By:_____________________________________________
                                  Name: _______________________________________
                                  Title: ______________________________________


                                  Schedule 1
                                  ----------

                    List of Incremental Facility C Lenders
                    --------------------------------------

Name:                                                       Commitment:
- ----                                                        ----------
Toronto Dominion (Texas), Inc.                              $75,000,000.00
Credit Suisse First Boston                                  $75,000,000.00
General Electric Capital Corporation                        $50,000,000.00
The Chase Manhattan Bank                                    $50,000,000.00


                                  Schedule 2
                                  ----------

Incremental
Facility Amount:        Up to $300,000,000 ("Term Loan C")
                                             -----------


Purpose:                Proceeds may used (a) to fund capital expenditures as
                        permitted in the Loan Agreement, (b) to finance
                        acquisitions and investments as permitted in the Loan
                        Agreement, (c) to finance operations of its Restricted
                        Subsidiaries and (d) for general corporate purposes.

Loans:                  The Incremental Facility Lenders having Term Loan C
                        Commitments (the " Term Loan C Lenders") agree
                        severally, and not jointly, upon the terms and subject
                        to the conditions of this Notice and the Loan Agreement
                        to lend to the Borrower, in up to three separate
                        advances, each of which must be at least $100,000,000.00
                        or a multiple thereof, on or from time to time after the
                        effective date of the Term Loan C Commitments, amounts
                        which do not exceed, (i) in the aggregate at any one
                        time outstanding, the Term Loan C Commitments and, (ii)
                        individually, such Term Loan C Lender's Term Loan C
                        Commitment, in each case, as in effect from time to
                        time; provided, however that amounts repaid under the
                              --------  -------
                        Term Loan C Commitments may not be reborrowed.


Conditions Precedent:   The obligation of the Term Loan C Lenders to undertake
                        the Term Loan C Commitments, and the effectiveness of
                        the Term Loan C Commitments are subject to the prior or
                        contemporaneous fulfillment of each of the following
                        conditions:

                              (a)    The Administrative Agent and the Term Loan
                        C Lenders shall have received each of the following:

                                     (i)     Notice of Incremental Facility
                        Commitment, duly executed by the Borrowers, the
                        Restricted Subsidiaries and the other Guarantors;

                                     (ii)    duly executed Term Loan C Notes;

                                     (iii)   all such other documents as either
                        the Administrative Agent or any Term Loan C Lender may
                        reasonably request, certified by an appropriate
                        governmental official or an Authorized Signatory if so
                        requested; and

                                     (iv)    any and all fees which may be due
                        upon closing.


                              (b)    The Administrative Agent and the Term Loan
                         C Lenders shall have received evidence satisfactory to
                         them that all Necessary Authorizations, including,
                         without limitation, all necessary consents to the
                         closing of this Term Loan C, have been obtained or
                         made, are in full force and effect and are not subject
                         to any pending or, to the knowledge of the Borrowers,
                         threatened reversal or cancellation, and the
                         Administrative Agent and the Term Loan C Lenders shall
                         have received a certificate of an Authorized Signatory
                         so stating.

Availability:            Term Loan C shall be available only after the
                         Administrative Agent shall have received evidence that
                         all amounts under the existing Term Loan A, Term Loan B
                         and the Revolving Loan Commitment are fully drawn.

Incremental Facility C
Maturity Date:           June 30, 2008

Repayment                Term Loan C shall amortize in equal quarterly
Schedule:                installments of 50.0% commencing on March 31, 2008,
                         with the balance due on the Maturity Date as shown
                         above, based on a percentage of the principal balance
                         outstanding under the Term Loan C on March 30, 2008.
                         Such amounts shall be repaid on the last day of each
                         calendar quarter.

Interest Rate:           For all purposes under the Loan Agreement, the Term
                         Loan C shall accrue interest as set forth for the Loans
                         under Section 2.3(f) of the Loan Agreement with the
                         following Applicable Margins:

                                         Base Rate Advance     LIBOR Advance
                         Period          Applicable Margin     Applicable Margin
                         ------          -----------------     -----------------
                         Closing Date through
                         October 31, 2002          3.000%               4.000%

                         November 1, 2002 through
                         March 31, 2003            4.000%               5.000%

                         Thereafter. the Applicable Margins shall increase by
                         0.25% per quarter until the Term Loan C Loans are paid
                         in full.


Facility Fees:           Commencing on April 1, 2003 and on the first day of
                         each calendar quarter thereafter, a facility fee shall
                         be paid to the Term Loan C Lenders in an amount equal
                         to 0.250% on the Term Loan C commitment. The Facility
                         Fee will be fully earned when due and non-refundable
                         when paid.

Commitment Fee:          A commitment fee shall be paid to the Administrative
                         Agent for the account of each Term Loan C Lender in
                         accordance with such Lender's applicable Commitment
                         Ratio for the Term Loan C based on the average unused
                         Term Loan C Commitment of such Lender for each day from
                         the date hereof through and including the date on which
                         the Term Loan C Commitment is cancelled in full at a
                         rate of two percent (2.000%) per annum. Such commitment
                         fee shall be computed on the basis of a year of 365/366
                         days for the actual number of days elapsed, shall be
                         payable quarterly in arrears on the last Business Day
                         of each calendar quarter, and shall be fully earned
                         when due and non-refundable when paid.

Payments:                Payments of interest and principal shall, except to the
                         extent set forth herein, be payable in the same manner
                         as payments for interest and principal of the Term
                         Loans under the Loan Agreement.

Mandatory Reduction/     (A)Debt Proceeds - 100.0% of the net proceeds from the
Repayment:                  -------------
                         sale of any public or private debt issuance shall be
                         required to repay the Term Loan C and reduce the Term
                         Loan C commitment (to the extent that there are no Term
                         Loan C loans outstanding).

                         (B)Equity Proceeds - 100% of the net proceeds (other
                            ---------------
                         than (x) net proceeds in an amount not to exceed
                         $2,000,000.00 in the aggregate after the Agreement Date
                         from the sale or issuance of Capital Stock in
                         connection with any employee stock option plan of such
                         Person or (y) proceeds received from Capital Stock
                         issued in connection with an Acquisition permitted
                         hereunder) of the sale of any capital stock shall be
                         required to repay the Term Loan C and to reduce the
                         Term Loan C commitment (to the extent that there are no
                         Term Loan C loans outstanding); provided, however, that
                                                         --------  -------
                         on or prior to April 30, 2002, if on the date of any
                         sale of capital stock there are no loans outstanding
                         under Term Loan C, the Term Loan C commitment shall not
                         be reduced by up to $200,000,000 of the net proceeds
                         received from such sale of capital stock.


                                  Schedule 3
                                  ----------

                                  Guarantors
                                  ----------

ATC Holding, Inc.

American Tower Corporation

ATC Operating, Inc.

OmniAmerica Holdings Corporation

CommSite International, Inc.

TeleCom Towers L.L.C.

ATC LP Inc.

ATS/PCS, LLC

OmniAmerica Towers, Inc.

South Atlantic Tower Corporation

OmniTower, Ltd.

American Tower PA LLC( f.k.a American Tower Texas) (f.k.a. ATC Financing LLC)

ATC Tower Services, Inc. (f.k.a. Specialty Constructors, Inc.)

Commsite Towers, Inc.

US Sitelease, Inc.

Prime Telecom Communications Co.

RFM Facilities Management LP

American Tower Management, Inc.

Maritime Telecommunications Network, Inc.

American Tower Trust #1

American Tower Trust #2

Flash Technology Corporation of America


Modern Technical Services, Inc.

Flash Technology International, Inc.

Kline Iron & Steel Company, Inc.

ATC (TV), Inc. (f.k.a. Tower Ventures, Inc.)

ATC (TV), LLC, (f.k.a Tower Ventures, LLC)

ATC Midwest, LLC

Verestar Networks, Inc., (f.k.a. InterPacket Networks, Inc.)

Verestar AG, fka Verestar GmBH

Interpacket Promoters India Limited (49%)

Interpacket (Singapore) Pte Limited

Interpacket Brazil Limitada

Interpacket de Argentina S.A. (99%)

Digital Seas International, Inc.

General Telecom, Inc.

Verestar International, Inc.

Unisite, Inc.

American Tower Delaware Corporation

Unistar Technologies, Inc.

Unisite Alpha, Inc.

National Wireless Infrastructure LP

Pisa Real Estate LLC

ATC South LLC

Digital Television Towers, Ltd.

Carolina Towers, Inc.

Site Advantage, Inc.


MHB Tower Rentals of America, LLC, fka Communisite Tower Rentals of America, LLC

ATC Mexico Holding Corp.

ATC MexHold, Inc.

ATC South America Holding Corp.

MTS Wireless Components (S) PTE, Ltd., a Singapore company

ATC International Holding Corp., (f.k.a American Tower International, Inc.)
(f.k.a. ATC Broadcast GP, Inc.)

American Tower do Brazil, Ltd.