North Chattahoochee Interceptor Improvements Phase 2

The project involves constructing a large‑diameter sanitary sewer interceptor (Phase 2) in the North Chattahoochee River corridor of Gwinnett County, GA. The contractor will install approximately 6,800 ft of 54‑inch gravity sewer pipe, place 18 precast concrete manholes, abandon existing smaller‑diameter sewer pipe, provide stream‑crossing encasements, perform rock removal, backfill, and debris removal, and conduct CCTV inspections of completed pipe and manholes. The bid includes several unit‑price items (rock removal, additional bedding, backfill material, unsuitable‑material removal, and CCTV inspection costs). The contract requires pre‑qualification, a virtual pre‑bid conference, and a sealed‑bid submission by May 15 2026. Substantial completion must be achieved within 390 days of contract award. • Install ~6,800 ft of 54‑in. ductile‑iron (or approved FRP) gravity sewer and 18 precast concrete manholes. • Provide concrete encasement at stream crossings, rock‑removal, bedding, backfill, and debris‑removal as unit‑price items. • Perform CCTV inspection of installed pipe/manholes; cost to be included in the bid. • Abandon existing 30‑in. and 36‑in. sewer lines, provide temporary bypass pumping, and deliver as‑built drawings with GIS data.