CALIFORNIA RED-LEGGED FROG HABITAT PROTECTION, - POND 1 SPILLWAY REPAIR AND CHANNEL RESTORATION

The project centers on the repair and restoration of Pond 1 at the Vallejo Swett Ranch in California, a historically significant breeding and rearing habitat for the threatened California red-legged frog. The pond’s concrete spillway has deteriorated due to erosion, threatening to breach the dam during storms and permanently lose the habitat, while also causing downstream channel incision and degradation of adjacent creek ecosystems. The work involves removing the damaged spillway, rehabilitating the earth-fill dam, installing a 6-inch steel siphon for controlled drainage and invasive bullfrog removal, constructing an armored spillway with a stilling basin, applying rip-rap and geotextile for erosion control, planting native riparian vegetation, and installing a wildlife-friendly fence to exclude livestock. All construction is scheduled for a narrow window between September and mid-October to avoid disrupting the frog’s breeding season. The project is funded with a total mitigation cost of $500,000, divided into $230,000 for permitting, engineering, and monitoring, and $270,000 directed to a long-term conservation endowment for the Vallejo Swett Ranch. The Solano Transportation Authority is the lead funding and oversight agency, with the Solano Land Trust serving as the contractor. Compliance with multiple environmental regulations is integral to the project’s execution, including Clean Water Act Sections 404 and 401, a Lake and Streambed Alteration Agreement from the California Department of Fish and Wildlife, a major grading permit from Solano County, and potential requirements for an incidental take permit under the California Endangered Species Act. The project qualifies for a CEQA Class 33 categorical exemption, and a Notice of Exemption has been filed. Key supporting documentation includes habitat assessments from Fidenci and Hanes (2007), a 2011 baseline survey by Nomad Ecology, the U.S. Fish and Wildlife Service’s 2002 Recovery Plan for the California red-legged frog, and a watershed assessment of the San Geronimo Valley. Inspections and acceptance will occur on-site at Vallejo Swett Ranch, governed by the stipulations of the applicable permits and approved habitat restoration standards. No formal contract line items, pricing schedules, or procurement evaluations are detailed in the available materials, and while the project is forecasted with a posted date of August 7, 2025, and a signature date of July 31, 2025, a formal