Culvert Replacement and Upsizing

The contract entails the replacement of 28 culverts across Sonoma County, with most being replaced in-kind while selected units are upsized or realigned to ensure compliance with 100-year flood flow standards. The work includes full excavation, proper installation, and implementation of erosion control measures to mitigate environmental impact during construction. The project is designed to enhance drainage capacity and resilience against extreme weather events in areas prone to flooding, ensuring long-term infrastructure reliability. All work is to be performed at multiple locations throughout the county, with no single designated city or zip code limiting the scope. The contract falls under NAICS code 237130, indicating it is categorized as water and sewage line and related structures construction. While the contract is classified as a subcontract, it is issued by Sonoma County under the California state jurisdiction, and the solicitation was posted in May 2026 with a projected start date following the posting.