Raw Water Tunnel Inspection

Charleston Water System (CWS) seeks detailed cost and resource information to perform an inspection of its raw water tunnel system. The scope includes inspecting two submerged access shafts (≈12‑ft diameter, 100‑ft deep) and the full 2.5‑mile, 8‑ft diameter tunnel connecting them. Contractors will provide labor, equipment, materials, and cost estimates for the inspection activities. • Inspect two 12‑ft diameter, 100‑ft deep submerged shafts. • Inspect approximately 2.5 mi of 8‑ft diameter raw water tunnel. • Submit detailed labor, equipment, material lists and associated cost estimates. • Deliver findings and recommendations to CWS for future maintenance planning.