500-year Flood Protection Project - Addendum No.1 to the Environmental Impact Report

The 500-year Flood Protection Climate Resiliency Project, managed by the Three Rivers Levee Improvement Authority in Yuba County, California, focuses on flood protection improvements across approximately 10 miles of five existing and newly created Reclamation District 784 levees. The scope of work includes raising and extending levee segments along the Bear, Yuba, and Feather Rivers, the western Goldfield Embankment, and the entire 5.9-mile Western Pacific Interceptor Canal West Levee. Specific activities involve levee modifications and the construction of a wind-wave buffer, which includes excavation, the installation of a drainage outlet, and the planting of trees and companion shrubs. The project is governed by several regulatory frameworks, including the California Fish and Game Code Section 1602 for lake and streambed alterations and California Code of Regulations Title 23, Article 3, Section 6 for work within adopted flood control plans. Both the California Department of Fish and Wildlife and the Central Valley Flood Protection Board have issued Notices of Determination confirming that the project, under solicitation YUB-52471-R2, will not have a significant environmental effect within their respective jurisdictions. These determinations are based on an Environmental Impact Report prepared by the lead agency, with official approval and notices filed as of January 16, 2026.