Pioneer Avenue over Lone Tree Creek Bridge Replacement Project

The County of Stanislaus is seeking competitive bids to replace the existing two‑span bridge on Pioneer Avenue over Lone Tree Creek. The scope includes demolition of the existing structure, installation of a temporary creek diversion, construction of a new single‑span reinforced‑concrete bridge supported by cast‑in‑steel‑shell piles, rock‑slope protection, roadway reconstruction, traffic control, and associated environmental mitigation. The contract is estimated at under $2 million and will be awarded to the lowest responsible bidder after a public bid opening on August 5, 2026. • Demolition, removal, and disposal of the existing bridge and associated utilities. • Construction of a new 45‑ft single‑span bridge with CISS piles, abutments, and wingwalls per Caltrans 2025 standards. • Required environmental compliance: Section 401 water‑quality certification, USACE NWP, and CDFW Incidental Take Permit for California tiger salamander. • Project schedule: Notice to Proceed by Jan 18 2027, then 98 working‑day construction period, with specific interim deadlines for tree removal (Feb 1 2027) and pile work (Mar 1 2027).