American Tower Builds Over 1,000 Towers in 1999 And Surpasses 10,000 Sites.

Business/Technology Editors

BOSTON--(BUSINESS WIRE)--Jan. 10, 2000

American Tower Corporation (NYSE:AMT) today announced it has constructed over 350 communications towers in the fourth quarter of 1999, completing a total of approximately 1,050 new builds for the year.

The American Tower portfolio currently spans 48 states and the District of Columbia, with tower clusters in 43 of the 50 largest U.S. metropolitan statistical areas. The majority of the new towers constructed in 1999 were built along major roadways and in and around metropolitan areas. These towers are predominantly self-supporting and monopoles, ranging from approximately 125 feet to 450 feet in height, and built to accommodate multiple co-location tenants. Upon completion of all its pending acquisitions, American Tower will own and operate more than 10,100 communications sites in the United States and Mexico.

Doug Wiest, Chief Operating Officer of American Tower, stated, "We are very proud of our team's ability to seek out new customer opportunities and perform to the highest level of expectations in this business. Building approximately 1,050 towers last year was a record-breaking achievement and is recognition of our leadership in both new tower construction and overall services work. We continue to attract and keep talented land acquisition, zoning and construction resources, and stress the need to ensure speed to market along with high quality service to our customers." Wiest added, "As we enter the new year we have a lot of upward momentum, providing us a solid platform from which to grow our portfolio and ultimately co-location revenues."

American Tower is the leading independent owner, operator and developer of broadcast and wireless communications sites in North America. Giving effect to pending transactions, American Tower operates approximately 10,100 sites in the United States and Mexico, including approximately 300 broadcast tower sites. Of the 10,100 sites, approximately 9,000 are owned or leased towers and approximately 1,100 are managed and lease/sublease sites. Based in Boston, American Tower has regional hub offices in Boston, Atlanta, Chicago, Houston, San Francisco and Mexico City. For more information about American Tower Corporation, please visit our web site www.americantower.com.

This press release contains "forward-looking statements" concerning future expectations, plans or strategies that involve a number of risks and uncertainties. The Company wishes to caution readers that certain factors may have affected the Company's actual results and could cause results for subsequent periods to differ materially from those expressed in any forward-looking statement made by or on behalf of the Company. Such factors include, but are not limited to (i) substantial capital requirements and leverage principally as a consequence of its ongoing acquisitions and construction activities, (ii) dependence on demand for wireless communications, use of satellites for internet data transmission, and implementation of digital television, (iii) the success of the Company's tower construction program and (iv) the successful operational integration of the Company's business acquisitions. The Company undertakes no obligation to update forward-looking statements to reflect subsequently occurring events or circumstances.