Providing premier environmental and geotechnical solutions since 1988.

301 Mission Street

San Francisco County

Treadwell & Rollo performed geotechnical, environmental, and earthquake services for this 60-story tower with retail and living space, 12-story structure with office and living space, 5-story structure with retail and ...

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555 Mission Street

San Francisco County

Treadwell & Rollo provided environmental, geotechnical and seismic services for 555 Mission Street, a project consisting of a 33-story, 485-foot-tall office building over two underground basement parking levels.  We performed ...

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888 Howard Street (Intercontinental Hotel)

San Francisco County

Treadwell & Rollo performed a geotechnical investigation and provided geotechnical services during construction of the Intercontinental Hotel at 888 Howard Street near Moscone Center.  The development includes a 40-story tower, a ...

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One Rincon Hill

San Francisco County

Completed in 2008, the 60-story South Tower of One Rincon Hill is the tallest residential building in California; the North Tower will be 47 stories when completed in 2010.  The ...

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St. Regis Museum Tower

San Francisco County

Treadwell & Rollo performed a geotechnical investigation at the St. Regis Museum Tower site, a 42-story hotel and residential building supported on a mat foundation bearing on dense sand. To construct ...

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Towers on Capitol Mall

Sacramento County

Treadwell & Rollo performed a geotechnical investigation and provided geotechnical consulting services during the design of the foundation system for the proposed Towers on Capitol Mall Project.  The project consisted ...

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