Sonoma Valley County Sanitation District System Protection Plan at Kohler & Sonoma Creek Crossing Project

The California Department of Fish and Wildlife has issued Lake and Streambed Alteration Agreement EPIMS-SON-50608-R3 to the Sonoma Valley County Sanitation District to authorize permanent repairs to sanitary sewer pipelines crossing Kohler and Sonoma Creeks in Sonoma County. The work involves stabilizing pipeline crossings using rock slope protection, fabric-reinforced fill structures with biodegradable materials, log rootwad revetments, brush mattresses, and native vegetation, along with armor plating the Sonoma Creek crossing using large boulders. Mitigation efforts include revegetation with native plants and installation of aquatic habitat enhancements, particularly for the endangered California freshwater shrimp, whose habitat overlaps with 210 linear feet of the project’s 305 linear feet of temporary riparian impact. The project will result in a permanent impact of 20 linear feet and temporary impacts totaling 290 linear feet to open water and 305 linear feet to riparian habitat, with the removal of two riparian trees. Access and staging will utilize existing driveways and residential parking to limit new disturbances. Compliance with the California Endangered Species Act Incidental Take Permit 2081-2024-026-03 and the Mitigated Negative Declaration is required, with oversight and acceptance responsibilities shared between the Sonoma Valley County Sanitation District and the California Department of Fish and Wildlife, which serves as the lead regulatory agency. The project is not a traditional procurement contract but a regulatory authorization issued under Fish and Game Code Section 1602, with no identified pricing, contract type, or formal acquisition data. Point of contact for environmental compliance is James Hansen of CDFW, and Dave Cook of the Sonoma County Water Agency serves as the lead agency representative. No formal contract clauses, payment terms, invoicing procedures, packaging requirements, or evaluation factors are specified in the available documentation, as the instrument functions primarily as an environmental permit with attached mitigation and monitoring obligations rather than a commercial procurement instrument.