UOSA IFB 27-02 P2NR+ Construction

The Upper Occoquan Service Authority is soliciting bids for extensive renewal and replacement work at the Millard H. Robbins, Jr. Regional Water Reclamation Plant. The scope includes replacing multiple screw pumps, upgrading return‑activated‑sludge pumps, improving cyclone/settleability in selector basins, replacing clarifier mechanisms, upgrading electrical load centers, and various associated piping and site‑electrical items throughout the plant. This is a large‑scale infrastructure project focused on improving nitrogen management and overall plant reliability. • Replacement of eight primary effluent lift station screw pumps and several primary sludge pumps. • Upgrade of two RAS pumps and installation of additional pumping capacity at RAS Pump Station 9/1. • Cyclone and selector basin enhancements, plus replacement of secondary clarifier mechanisms. • Electrical upgrades for Load Centers No. 1 and No. 8 and related site‑wide electrical work.