Annapolis Water Reclamation Facility – Raw Lift Station Valve Replacement

Johnston Construction Company

• Johnston Construction Company served as Prime Contractor for the replacement of four 20-inch suction valves serving the raw wastewater lift pumps at the Annapolis Water Reclamation Facility in Annapolis, Maryland.
• JCC's work included temporary wastewater bypass pumping designed to accommodate approximately 15 million gallons per day (MGD), allowing the influent pumping station to undergo valve replacement while incoming wastewater was diverted around the construction area.
• 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.