TO: The Honorable Lake County Board of Supervisors
FROM: Lars Ewing, Interim Public Works Director
Mireya G. Turner, Community Development Director
Michelle Irace, Senior Planner
DATE: November 18, 2025
SUBJECT: 2:00 P.M. - Consideration of Adoption of Addendum to the Initial Study/Mitigated Negative Declaration (IS/MND) for the South Main Street and Soda Bay Road Widening and Bike Lanes Project
Exhibits
A. CEQA Addendum, October 2025
Attachment A: References
Attachment B: Nighttime Construction Noise Memorandum (May 2016)
Attachment C: Supplemental Biological Resources Review (January 2016)
Attachment D: Caltrans Section 7 Biological Revalidation (May 2025)
B. Caltrans NEPA Revalidation, June 2025
C. January 24, 2013, Planning Commission Staff Report
D. 2012 Initial Study with Mitigated Negative Declaration/Environmental Assessment
EXECUTIVE SUMMARY
As your Board is aware, the County is rapidly progressing with the South Main Street and Soda Bay Road corridor improvement project. The project proposes to reconstruct and widen the existing two-lane road corridor to three lanes, add 8-foot shoulders, underground existing overhead utilities, and incorporate an extension of the City of Lakeport's water main in the unincorporated area south of Lakeport. Following extensive environmental studies, securing various regulatory permits, acquiring numerous rights-of-way, and securing sufficient funding through the California Transportation Commission, the County is now ready to advance the project to the construction phase.
The project is funded, in part, by grant funding received from the Federal Highway Administration (FHWA). As such, the project required evaluation under both the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA). The County was the lead agency under CEQA and the California Department of Transportation (Caltrans), as assigned by the Federal Highway Administration (...
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