Pier 94 Backlands
Client: Port of San Francisco
Contractor: Fontenoy Engineering
Project Value: $1.3M
Project Overview:
This project involved the construction of a reinforced concrete headwall and associated stormwater infrastructure improvements for a newly installed 36-inch storm drain outfall at Pier 94 and serves a 15-acre redeveloped industrial zone, improving stormwater management and environmental compliance.
To facilitate the concrete wall structure, a cofferdam was constructed preventing tidal waters from entering the construction zone.
In addition to installing the 36'' storm drain by open-cut methods, slip lining was performed under an existing concrete plant.
Strategic Approach:
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Headwall Construction:
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Built 15 feet below high tide, requiring a sheet pile cofferdam and 24/7 dewatering.
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Work was tidal-dependent, limiting hours.
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Slip Lining an Existing Pipe:
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Reinforced 250’ CMP pipe under Amador St. and Central Concrete plant.
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Managed collapsed sections due to heavy truck/equipment loads.
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Coordinated closely with Central Concrete to avoid disruptions.
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Additional Work:
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Installed three large cast-in-place manholes for pipe transitions.
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