Annapolis Water Reclamation Facility – Raw Lift Station Valve Replacement

Key Accomplishments

• Provided for continuous operation and monitoring of temporary bypass pumping equipment, including backup pumping capacity, flow management, and contingency measures to protect the existing wastewater infrastructure.
• Performed wet-well cleaning operations involving removal of accumulated grit, grease, rags, debris, and residual wastewater, together with off-site disposal of removed solid materials.
• Furnished and installed four new 20-inch eccentric plug valves on the raw lift pump suction connections, including associated pipe fittings, flanges, gaskets, bolts, spacers, and piping modifications required for installation.
• JCC's valve replacement scope incorporated geared valve operators and provisions for adapting or reusing existing extended-stem operating mechanisms.
• Removed the existing 2-inch galvanized drain-line system extending from the pump suction piping into the wet well, including associated piping components and existing wall penetrations.
• Completed restoration of three existing penetrations through an approximately 24-inch-thick concrete wall separating the wet well and dry well, incorporating structural bonding materials, waterstop systems, and non-shrink grout to establish watertight seals.
• Performed surface preparation and protective painting of the new valves, associated fittings, and existing suction piping extending from the wall to the pump connections.
• Provided for 24-hour leak testing of the installed valves, suction piping connections, and sealed concrete wall penetrations before restoring normal wastewater flow through the pumping station.
• Coordinated construction sequencing, bypass pumping, mechanical installations, testing, and startup activities with Anne Arundel County to support the continued operation of the wastewater treatment facility.
• The Project Was Completed On February 25, 2014.