WTP Flocculation 4/5 Gallery Improvements

The City of Ann Arbor is soliciting bids to upgrade the Flocculation 4/5 Gallery at its Water Treatment Plant. The work includes demolition of existing gallery structures, replacement of 175 ft of 4‑in. drain pipe with new 6‑in. pipe, removal and installation of new supports, recoating of existing drain castings, replacement of four flocculation drives (stuffing‑box assemblies, bearings, shafts, chains, sprockets) using owner‑procured equipment, minor painting, and associated civil‑structural work. The contract is a lump‑sum construction agreement with a 6‑week construction window slated for March 2026, strict prevailing‑wage, living‑wage, and non‑discrimination compliance, and requires a 5 % bid bond, 120‑day bid validity, and extensive documentation (certifications, submittals, as‑built records, warranties). • Scope: drain‑pipe upsizing, floc drive replacement, concrete demolition/repair, painting, and related site preparation. • Schedule: mandatory pre‑proposal conference 15 Oct 2025; questions due 21 Oct 2025; bid submission 6 Nov 2025; construction window 23‑31 Mar 2026 (6 weeks). • Compliance: prevailing‑wage, living‑wage, non‑discrimination, insurance, performance & labor‑material bonds, OSHA/MIOSHA safety, environmental controls, and detailed record‑keeping required.