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Oakland Harbor Navigation Improvements, 50' Deepening Project, Phase 3, Manson / Dutra Joint Venture

Dredging Project in San Francisco, CA

Project Details

Client: United States Army Corps of Engineers San Francisco District
Location: San Francisco, CA

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Project description

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Project Description

As 50/50 joint venture partners, Dutra performed 50% of the work to deepen the federal channels of the Oakland Harbor and Port-maintained berths from -42’ to depths of over -50’. Over 6.5 million cubic yards of material was excavated by a combination of hydraulic and clamshell dredging.

The dredge spoils were used to create environmental enhancement and wetland habitat at the Middle Harbor Enhancement Area, and the Hamilton Army Airfield Wetlands Restoration project (HWRP) in Novato.

Over 5 million cubic yards of material dredged was deposited for beneficial re-use at the HWRP with 547 acres of planned habitats including tidal wetlands, seasonal wetlands, upland ponds, upland grasslands, tidal ponds, a wildlife corridor, an intertidal channel and a mudflat area. Material was pumped up to seven miles to the HWRP site using a system of five pumps.

Project Scope

  • Widening and deepening of the Harbor Entrance, Outer and Inner Harbor channels, two turning basins and deepening the Federal Shipping Channel -50 feet Mean Lower Low Water.
  • New work dredging with hard sand (San Antonio Formation)