Phase 2 Nitrogen Removal Plus Other Interim Process Improvements

Nitrogen-removal and renewal/replacement improvements at UOSA's Millard H. Robbins, Jr. Regional Water Reclamation Plant in Centreville, Virginia. Work includes replacement of eight primary-effluent screw pumps, RAS pumping upgrades, hydrocyclone and selector-basin improvements, secondary-clarifier mechanism replacement, electrical load-center upgrades, primary-sludge pumping improvements, and associated process piping, structural, architectural, HVAC, plumbing, electrical, instrumentation, controls, and site work. Construction is phased across three subprojects while portions of the plant remain in continuous service.

Bids are due October 22, 2026, at 2:00 PM Eastern Time. Contract UOSA P2NR+ / IFB 27-02.

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