Services & Projects
Coast Guard Island Bridge
Alameda County
Treadwell & Rollo performed a geotechnical investigation and developed site-specific seismic response spectra for the 260-meter-long Dennison Street Bridge replacement, a precast, bulb T-girder structure with spans of approximately 36 ...
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Conoco Phillips Marine Terminal Upgrade and MOTEMS Evaluation
Contra Costa County
This T-shaped, 1250-foot-wide terminal on the south side of the Carquinez Straits was upgraded to moor larger tankers. Treadwell & Rollo performed two field investigations (in 2000 and 2008), including ...
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Golden Gate Bridge
San Francisco County
The Golden Gate Bridge seismic retrofit included replacement of four steel towers supporting the approximately 1000-foot-long, six-lane north approach viaduct. To provide temporary foundation support, 6-foot-diameter, cast-in-drilled-hole piles were installed ...
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