Grayson & Walnut Creeks Levee Improvement at CCCSD Treatment Plant Project

Location:	California
Posted:	Jan 14, 2026
Due:	Feb 17, 2026
Agency:	Contra Costa County
Type of Government:	State & Local
Category:	Y - Construction of Structures and Facilities
Publication URL:	To access bid details, please log in.

General work description: The work to be done generally consists of raising the western levee along Grayson Creek and Walnut Creek between State Route 4 to the south and BNSF railroad tracks to the north to increase the flood protection for the CCCSD wastewater treatment plant located in Martinez. Work includes placing and compacting levee fill, constructing concrete flood walls, reconstructing a concrete maintenance road, removing railroad tracks, replacing fence and gates, paving driveway conforms and adjusting and relocating various utilities.

Order Remove Order hard copies for this entire project for $200.00

Details

Plans

Specs

Plan Holders

Submit Bid

StatusAccepting Bids

Prebid Date	2/2/26 10:00am
Bid Date	2/17/26 2:00pm

Company & Contacts

Contra Costa County

Jenna Caldwell

925-313-2020

jenna.caldwell@pw.cccounty.us

Location

Martinez, CA

Reference

CCC_NTB_8348.pdf

Engineer's cost estimate: BASE BID: $7,130,000

Bid Additive 1: $310,000

Bid Additive 2: $352,000

Bid Alternate 1: $1,075,000

A virtual pre-bid meeting will be held on Monday, February 2, 2026, at 10:00 a.m. to cover project construction and the County’s Bidder Outreach Program. Prospective bidders attendance is recommended but not mandatory. Virtual meeting instructions can be found on the Contra Costa County Public Works Department’s website at www.cccounty.us/pwprojects .

Grayson & Walnut Creeks Levee Improvement at CCCSD Treatment Plant Project

See also