LocationFort George G. Meade, Maryland
MarketWastewater Treatment Plants
WASTE ACTIVATED SLUDGE & RETURN ACTIVATED SLUDGE PUMP, VFD, CHECK VALVE, ELECTRICAL & SCADA UPGRADES.
Johnston Construction Company
- Served as Civil Subcontractor to American Water Operations and Maintenance, Inc. for the Waste Activated Sludge (WAS) and Return Activated Sludge (RAS) pump replacement project at the Fort George G. Meade Wastewater Treatment Plant. American Water's RFP identifies American Water as the Prime Contractor operating the Fort Meade water and wastewater systems under its long-term utility privatization agreement.
- Furnished the labor, materials and equipment associated with replacement of two existing WAS pumps and three existing RAS pumps, together with associated controls, electrical systems and ancillary equipment.
- Provided two Gorman-Rupp WAS pumps rated for 150 GPM at 25 feet Total Dynamic Head.
- Provided three Gorman-Rupp RAS pumps rated for 2,300 GPM at 20 feet Total Dynamic Head, configured for alternating operation.
- JCC's internal project record further identifies the installed pumping equipment as three 10-inch Gorman-Rupp horizontal centrifugal RAS pumps and two 3-inch Gorman-Rupp horizontal centrifugal WAS pumps.
Electrical Services Division
- Performed the specialized electrical and instrumentation portion of the Fort George G. Meade Wastewater Treatment Plant WAS and RAS Pump Replacement project under subcontract to Johnston Construction Company.
- Furnished the labor, materials, tools and equipment necessary for electrical modifications associated with replacement of two Waste Activated Sludge (WAS) pumps and three Return Activated Sludge (RAS) pumps.
- Removed the existing electrical connections serving the two WAS pumps and installed new 30-amp, 480V, three-phase NEMA 3R safety switches for the replacement pump equipment.
- Reconfigured existing motor-control-center equipment, including removal and relocation of an existing WAS pump starter and relocation of a 15-amp, 480V spare breaker bucket between MCC sections to accommodate the revised electrical configuration.
- Furnished and installed the conduit, conductors and fittings necessary to reconnect the existing electrical feeders to the two replacement WAS pumps.