US Army Corps of Engineers
San Francisco District

Suisun Bay Channel

SUISUN BAY CHANNEL
OPERATIONS AND MAINTENANCE

PROJECT LOCATION AND DESCRIPTION

This project is located 30 miles northeast of San Francisco and is part of the San Francisco Bay to Stockton Ship Channel. The project provides for annual maintenance dredging of (1) the Suisun Bay Channel (main channel), which is 300 feet wide with a depth of 35 feet Mean Lower Low Water (MLLW), from the Carquinez Strait at Martinez to Pittsburg, (2) New York Slough Channel further upstream to Antioch, a distance of almost 17 miles; (3) a channel 250 feet wide with a depth of 20 feet MLLW south of Seal Islands, from the main channel at Point Edith to the main channel again at Port Chicago, at mile 6.

TOTAL FUNDING

 

TOTAL COST

                                 N/A

FEDERAL COST

                                 N/A

NON-FEDERAL COST

                                 N/A

 

 

TOTAL FEDERAL COST THROUGH FY 2019

                     $6,804,000

FY 2020 BUDGET

                     $5,800,000

COST TO COMPLETE

                                 N/A


FY 19 AND FY 20 ACCOMPLISHMENTS (based on the availability of funds)

  • Plan to perform dredging of approximately 120,000 CY in FY19 with a clamshell dredge contract.
  • Using a contract clamshell dredge due to the endangered Delta Smelt within the channel.
  • ERDC plans to complete numerical modeling of hopper dredge in FY19 to help determine potential for fish entrainment.
  • ERDC to continue hopper dredge monitoring with the Richmond Outer dredging project.
  • ERDC, SPN, and SPK, to evaluate fish entrainment on clamshell dredging and compare with the hopper dredging for any potential impacts to the Delta Smelt.

ISSUES AND OTHER INFORMATION

  • Contra Costa County is the Non-Federal Sponsor (NFS).
  • Bullshead Shoal requires advance maintenance dredging annually in order to avoid ships running into bridge piers and causing environmental disasters.
  • Need ERDC working with SPN and SPK to evaluate the entrainment of fishery on the hopper and clamshell dredges and present to the environmental agencies for their review and comments.
  • May need to deliver material upland (instead of SF-16) in FY19, to meet environmental permitting requirement.

CONGRESSIONAL INTEREST

  • 3rd District, Rep. John Garamendi
  • 5th District, Mike Thompson
  • 11th District, Rep. Mark DeSaulnier

POINT OF CONTACT

  • Deputy for Project Management, Edwin S. Townsley, (415) 503-6593.

Updated on 31 January 2019

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Contact

General Questions
415-503-6708
450 Golden Gate
San Francisco, CA 94102