Sir Francis Drake Blvd MP 20.28 Landslide Repair

The County of Marin is seeking bids for the repair of a landslide‑affected section of Sir Francis Drake Boulevard at Milepost 20.28. The work includes constructing a 75‑ft reinforced concrete retaining wall with soldier piles, removing and replacing a 15‑in. culvert segment, installing drainage improvements, restoring the embankment with native vegetation, and repaving roughly 100 ft of roadway. The contract is fully funded with federal aid (ER‑15J1) and requires compliance with prevailing‑wage, DBE, and environmental regulations. • 75‑ft concrete retaining wall with steel soldier piles (≈ 536 LF) and structural concrete (≈ 51 CY) • Drainage upgrades: under‑drain, dike, erosion‑control fabric, and storm‑water pollution control measures • Roadway work: clearing & grubbing, aggregate base, hot‑mix asphalt paving, traffic‑stripe installation, and guardrail/railings • Environmental stewardship: native‑plant revegetation, wildlife protection, and storm‑water best practices • Mandatory bid bond (10 % of bid) and post‑award performance/payments bonds (100 % of bid)