Greenbrier 218,000-Gallon Water Storage Tank & 500-GPM Booster Pump Station

Key Accomplishments

Johnston Construction Company

• JCC installed a new 500-GPM booster pumping station, including pumps, process piping, valves, supports, vibration-isolation components, and related equipment.
• The work included new yard piping, water-main connections, valves, fittings, appurtenances, and fire-hydrant improvements.
• JCC completed reinforced-concrete foundations, slabs, equipment supports, reinforcing-steel installation, miscellaneous metals, insulation, and damp-proofing.
• The project included electrical power conductors, raceways, boxes, supports, enclosed switches, circuit breakers, equipment connections, and associated electrical upgrades.
• JCC coordinated the SCADA monitoring and control-panel improvements required to operate and monitor the new tank and booster pumping systems.
• Site improvements included clearing, earthwork, aggregate backfill, dewatering, stormwater management, sediment and erosion controls, fencing, turf establishment, and final restoration.
• JCC coordinated system startup, commissioning, operational testing, owner training, record documentation, and final turnover.
• Johnston Construction Company completed the Greenbrier Water Storage Tank project at 47314 Green Leaf Road in Lexington Park, Maryland. The project was performed for the St. Mary’s County Metropolitan Commission.
• The project included construction of a new 218,000-gallon water-storage tank, yard piping, stormwater-management improvements, sediment and erosion controls, a new 500-GPM booster pumping station, piping and valves within the water station, and electrical and SCADA upgrades.
• JCC coordinated the complete construction effort, including mobilization, scheduling, submittals, procurement, site safety, quality control, excavation, concrete construction, tank installation, pumping equipment, piping, electrical systems, instrumentation, startup, training, and closeout.
• The principal project feature was the new 218,000-gallon water-storage tank.
• JCC coordinated the tank foundation, structural components, piping penetrations, tank assembly, access systems, equipment connections, coatings, testing, and commissioning required for a complete potable-water storage facility.

Electrical Services Division

• Electrical Services Division, LLC completed the designated electrical work associated with the Greenbrier Water Storage Tank project in Lexington Park, Maryland.
• ESD furnished the labor, materials, tools, equipment, and supervision required for its electrical construction scope.
• The work included electrical demolition, conduit, wiring, boxes, devices, switchgear, and final electrical connections.
• ESD furnished and installed the electrical equipment rack, electrical disconnect, and instrumentation LIT termination box.
• The project included excavation and installation of a concrete-encased electrical ductbank serving the new water-storage and pumping facilities.
• ESD coordinated electrical materials and equipment furnished by Johnston Construction Company and other project suppliers.
• The work included limited instrumentation terminations and electrical interfaces associated with the new water-storage system.
• ESD supported electrical inspections, startup, testing coordination, operation and maintenance documentation, and preparation of record drawings.
• Electrical Services Division, LLC completed the electrical portion of the Greenbrier Water Storage Tank project at 47314 Green Leaf Road in Lexington Park, Maryland.
• The overall project included construction of a new 218,000-gallon water-storage tank, yard piping, stormwater-management improvements, sediment and erosion controls, a new 500-GPM booster pumping station, piping and valves within the water station, and electrical and SCADA upgrades.
• ESD’s work supported the electrical infrastructure required for the new water-storage and pumping facilities.
• The electrical scope included demolition of designated existing electrical components and preparation of affected systems for the new construction.
• ESD coordinated shutdowns and disconnections with Johnston Construction Company to ensure that existing systems were made safe before removal or modification.
• Electrical equipment and circuits designated to remain were protected throughout construction.