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Flood control update: Ross Valley fish-ladder removal tentatively set for 2025, larger works in 2026
Summary
Marin County Flood Control’s Flood Zone 9 advisory board updated the council on multi-year projects including Sunnyside detention basin, planned demolition of a constricting bridge structure, and a Quarter Madera Creek project that could reduce flooding for more than 500 properties; FEMA review of hydraulic modeling remains the gating item.
Ross — Flood Zone 9 advisory board member Chris Martin briefed the Town Council on the status of multiple Ross Valley flood-risk projects, telling the council that a long‑anticipated removal of the fish ladder near the Ross Post Office is now anticipated in 2025 and related channel work is likely to commence in 2026.
Martin outlined the watershed history and a set of projects begun after damaging storms, including work completed at Sunnyside Stormwater Detention Basin in Fairfax and acquisition of the problematic Building Bridge 2 structure for eventual demolition.…
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