SAN FRANCISCO: "two 1, 200-foot towers, two 900-foot structures" proposed

Proposal to build two massive towers in SF - John King, Chronicle Urban Design Writer Thursday, December 21, 2006 (12-21) 15:01 PST SAN FRANCISCO -- Developers have filed a proposal to erect the nation's tallest buildings outside of New York and Chicago - a pair of slender San Francisco towers that would climb 350 feet higher than the Transamerica Pyramid. The plan, filed today with the city's planning department, envisions a cluster of unusually thin high-rises spread across two acres at the northwest corner of First and Mission streets: two 1, 200-foot towers, two 900-foot structures and a 600-foot companion. Down on the ground would be an open plaza, covered passageways and two small existing buildings. By comparison, the Transamerica Pyramid is 853 feet high and the Bank of America building is 779 feet. The only buildings in the United States of greater height than what is proposed for San Francisco are Sears Tower in Chicago and New York's Empire State Building. Today's filing is an application to start the environmental review process, rather than a formal design unveiling. By the time that occurs, the heights and dimensions of the towers could change. The lead architect for the project is Renzo Piano, who also is doing the new home of the California Academy of Sciences in Golden Gate Park. "It is highly conceptual at this point," Mark Solit, a member of the development team, said of the project. "Conceptual in terms of our discussion with the city, and conceptual in terms of Renzo Piano Building Workshop's vision of what they think might be appropriate." E-mail John King at jking@sfchronicle.com. URL: http://sfgate.com/cgi-bin/article.cg...AGUNN44C07.DTL>