Aug 14, 2026BoardMeeting
BoardMatanzas Creek Dam Rehabilitation Project Public Meeting
The meeting addressed the NRCS draft watershed plan and environmental assessment for the Matanzas Creek Dam Rehabilitation Project. Key discussion topics included the project's history within the central Sonoma watershed, identified deficiencies in the dam's auxiliary spillway due to erosion risks and seismic liquefaction potential, and insufficient sediment capacity for the next 50 years. The presentation outlined three specific rehabilitation alternatives considered, which involve various combinations of seismic buttress installation, sediment removal, and modifications to the dam crest and spillway to improve flood storage and safety.