Renovation of a water / sewer project in Accokeek, Maryland. Completed plans call for the renovation of a water / sewer project.

Piscataway WRRF Energy Efficient Submersible Mixer Upgrades WSSC Water aims to replace aging submersible mixers installed in 2001 in the Biological Nutrient Removal (BNR) process trains at the Piscataway Water Resource Recovery Facility (WRRF). The new installation will incorporate energy-efficient variable speed mixers with integrated VFDs, SCADA compatibility, and updated infrastructure to enhance operational efficiency, safety, maintenance, and accessibility. The project involves replacing the submersible mixers, including the selective demolition of the existing mixers, mixer lifts, and supports. The project includes installing (38) new mixers in Train 1 and (30) new mixers in Train 2. The mixer will be replaced on the existing masts, along with new davit lifts, and miscellaneous concrete structural repairs. The project also includes new power wiring, instrumentation, and controls. Bill-To Address W0567 Ship-To Address W0567 A. Section includes general requirements for work. B. The work of this project includes upgrades to the Piscataway WRRF biological nutrient removal (BNR) Train No. 1 and Train No. 2 basins: 1. Replace constant speed mixers with variable speed mixers (VFDs integral with mixers) at aeration basins. 2. Provisions for SCADA monitoring for mixers 3. Replace power and controls cable; replace conduit at BNR basins. 4. MCC modifications to accommodate new mixers. 5. Modify basin guardrails, as shown, to improve safety at basins and improve access for removal of mixers. Work includes: a. Guardrail replacement in identified sections of the basins. b. Associated concrete repair to allow for guardrail replacement. Location- 11 Farmington Rd W Accokeek, MD 20607 Question Deadline 09/24/2025 at 2:00 PM ET