UOSA IFB 27-02 P2NR+ Construction

Upper Occoquan Service Authority (UOSA) is requesting sealed bids for Phase 2 Nitrogen Removal Plus construction at the Millard H. Robbins, Jr. Regional Water Reclamation Plant in Centreville, Virginia, with bids due October 22, 2026 at 2:00 p.m. and a pre-bid conference on September 22, 2026 at 10:00 a.m. Bidders must demonstrate minimum qualifications: successful completion of at least three wastewater or water treatment facility construction projects within the last ten years, each valued at $20 million or more, with at least one being a rehabilitation or upgrade of an existing wastewater treatment facility completed within the last five years with a minimum value of $25 million.

The scope encompasses nitrogen management process improvements and renewal/replacement work at the regional facility. Major components include replacement of eight screw pumps at Primary Effluent Lift Stations 55/1 and 55/2; upgrade of two Return Activated Sludge (RAS) pumps with increased capacity at RAS Pump Station 9/1; cyclone and settleability improvements at Selector Basins 56/1a–56/3 and 56/4a–56/7; replacement of secondary clarifier mechanisms at Secondary Clarifiers 6/5 and 6/6; replacement of electrical equipment in Load Centers 1 and 8; replacement of a primary sludge pump at Primary Sludge Pump Station 54/2; and miscellaneous renewal/replacement improvements throughout associated facilities and site infrastructure.

Bidders must submit a lump sum bid based on a Major Equipment Schedule with circled named manufacturers and provisions for substitute manufacturers and deducts. Substantial completion timelines are 1302 days for Subproject A, 1120 days for Subproject B, and 1456 days for Subproject C from the Notice to Proceed; final completion is required within 90 calendar days thereafter. Bidders must perform at least 30 percent of contract value with their own forces, excluding equipment. Bid security of 5 percent is required for bids exceeding $100,000. Performance and payment bonds in the full contract amount are required if contract price exceeds $100,000. Liquidated damages range from $1,500 to $4,500 per day depending on the subproject and completion milestone. The owner's allowance of $775,000 for additional approved work is included in the bid. Questions are due 15 calendar days prior to bid opening. Contract execution is expected within 21 days of receipt of the signed contract, bonds, and insurance; Notice to Proceed will be issued within 30 days thereafter.