Services & Projects
Carquinez Bridge Temporary Trestle Piles
Contra Costa County
Under contract to Power Engineering, Treadwell & Rollo provided geological and geotechnical services for the California Department of Transportation for the new Carquinez suspension bridge west of the existing southbound ...
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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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Illinois Street Bridge
San Francisco County
Treadwell & Rollo performed a geotechnical investigation and provided services during construction for the Illinois Street Bridge located at Islais Creek Channel. The intermodal bridge, designed for pedestrian, automobile, and ...
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Pleasant Hill BART Station – Transit Village
Contra Costa County
Treadwell & Rollo performed the geotechnical investigation for proposed Transit Village, an approximately 18-acre site around BART that will include commercial (retail and office) and residential structures. The project consists ...
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