American Tower Corporation To Purchase Los Angeles Broadcast Site from Allcom Enterprises.

Business/Technology Editors

BOSTON--(BUSINESS WIRE)--April 10, 2000

American Tower Corporation (NYSE: AMT) announced today that it has entered into an agreement to purchase the Allcom Broadcast Tower Site on Mount Wilson in Los Angeles, California.

The purchase includes the existing Allcom towers and allows for the development of an additional broadcast tower on the site. Construction of the new tower will begin immediately upon closing which is expected to occur in the second quarter 2000, subject to customary closing conditions.

Jack Simison, President of Allcom Enterprises, stated, "We felt the American Tower team was the choice to take over this long-time owned site. They are broadcasters with the ability and resources to serve our existing customers and to continue our plans to construct a new tower to serve the future needs of Greater Los Angeles broadcasters."

Peter Starke, Vice President of Marketing and Development for American Tower, noted, "For years Mount Wilson has provided television and radio broadcasters with a tremendous technical advantage. We expect our new tower to be the most sought after digital television site in Los Angeles."

Including this project, American Tower has approximately 40 broadcast towers in construction or development and anticipates completing construction on over 20 of these broadcast towers in 2000.

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 10,400 sites in the United States and Mexico, including approximately 300 broadcast tower sites. Of the 10,400 sites, approximately 9,000 are owned or leased towers and approximately 1,400 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 sites www.americantower.com.

This press release contains "forward-looking statements" concerning future expectations, plans or strategies that involve a number of risks and uncertainties. American Tower Corporation, "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.