Polk Run WWTP Anaerobic Selector (10280726)

The City of Cincinnati is soliciting a fixed‑price construction contract to convert the existing Polk Run Wastewater Treatment Plant to a Biological Nutrient Removal (BNR) process. The work includes installing new piping and valves to return return‑activated‑sludge (RAS) to the fine‑screens channel, converting primary settling tanks into an anaerobic reactor, and preserving operational flexibility for high‑flow conditions. The contract is a single‑price bid with unit‑price sheets, requires a 10 % bid security, a performance bond for 100 % of the contract sum, and compliance with a 10 % Small‑Business‑Enterprise (SBE) participation goal. Substantial completion is required within 180 days of the notice to proceed, with final completion 180 days thereafter, and liquidated‑damage penalties apply for delays.