KNIGHTSEN, Contra Costa County — October 28, 2026. A bridge on Delta Road near Knightsen is among the locations included in Contra Costa County’s upcoming Bridge Preventative Maintenance program, a countywide project aimed at extending the useful life of existing crossings. The county currently estimates construction costs for the full eight-bridge program at $485,000.
Which bridge is included?
The county’s official project page lists Delta Road in Knightsen, as well as crossings in Bay Point, El Sobrante, the Orinda/Martinez area, Brentwood and Byron. Countywide work could include joint repairs, deck treatment, timber and concrete repairs, and cleaning and painting rusted steel members.
The $485,000 figure refers to the overall eight-bridge maintenance project, not a verified individual budget allocated solely to Delta Road.
What is the schedule?
Contra Costa County currently lists winter 2026–27 for advertising and bidding, spring 2027 as the estimated construction start and summer 2027 for estimated completion. The listed work duration is 85 working days for the overall project. These are planning estimates; the county has not identified a specific closure date or the exact days crews would be on Delta Road.
Where does the funding come from?
The county names the Federal Highway Bridge Program and SB 1 local gas-tax revenue as funding sources. The project is identified by county number 0662-6R4091 and federal number BPMP 5928 (155).
What residents should do
Knightsen drivers should follow updated public works notices for any traffic control or temporary detour once the project is bid and scheduled. An early planning page does not establish an immediate road closure. For the most current bid documents and project manager contacts, consult the county’s source page.
Official source
Contra Costa County Public Works — Bridge Preventative Maintenance. Checked October 28, 2026.
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