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.
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TOTAL FUNDING
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TOTAL COST
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N/A
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FEDERAL COST
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N/A
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NON-FEDERAL COST
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N/A
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FISCAL YEAR 2025 ALLOCATION
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$8,993,000
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FY 2026 BUDGET
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$12,6210000
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COST TO COMPLETE
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N/A
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FY26 ACCOMPLISHMENTS
- Updates in progress. Check back soon for more information.
FY25 ACCOMPLISHMENTS
- FY25 dredging completed using clamshell due to the endangered Delta Smelt and Long Fin Smelt within the channel.
FY24 ACCOMPLISHMENTS
- Dredged approximately 90,000CY in FY24 with a clamshell dredge contract.
- A contract clamshell dredge was used due to the endangered Delta Smelt within the channel.
- 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 to allow safe passage for vessels.
CONGRESSIONAL INTEREST
- 8th District, Rep. John Garamendi
POINT OF CONTACT
- Deputy for Project Management, Thomas R. Williams, 415-503-6560
Updated on 20 February 2026
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