LocationWaldorf, Charles County, Maryland
MarketPump Stations
NEW SUBMERSIBLE WASTEWATER PUMPING STATION AND FORCE MAIN IMPROVEMENTS.
Johnston Construction Company
- Johnston Construction Company was selected to construct the St. Charles Communities Pumping Station 7 project, a new wastewater pumping station serving the St. Charles Communities development in Charles County, Maryland.
- The project included construction of a new submersible wastewater pumping station, screen facility, generator facility, site improvements, electrical service, utility piping, force main, gravity sewer, and all associated appurtenances required for a complete and operational facility.
- Johnston Construction Company’s scope included field investigations, coordination with the local electrical utility, new transformer and service coordination, connection to existing sewers, excavation, construction, testing, startup, training, O&M manuals, and turnover of the new pumping station.
- Major utility work included installation of approximately 3,245 linear feet of 16-inch force main, pigging of the new force main, approximately 1,795 linear feet of 14-inch gravity sewer, approximately 15 linear feet of 18-inch gravity sewer, and approximately 617 linear feet of 24-inch gravity sewer.
- The project required careful coordination with Charles County Department of Utilities to minimize interference with existing operations, coordinate temporary shutdowns, provide bypass pumping or vacuum truck support when required, and complete tie-ins without interrupting service.
Concrete Services Division
- Concrete Services Division, LLC performed concrete placement, forming, finishing, and curing work for the St. Charles Pumping Station 7 project in Waldorf, Maryland.
- CSD’s scope included structural concrete work associated with the new pumping station facility, including generator pad, transformer pad, pump station building wet well, screen room, pipe room, grade slab, canopy piers, and housekeeping pads.
- Major work included formwork, concrete placement, concrete finishing, concrete curing, reinforcing steel support, anchor bolts, sleeves, embeds, expansion joints, vapor barrier, waterstop, premolded joint material, and concrete accessories.
- CSD performed concrete work for the pump station wet well, including wet well slab, wall sections, wall openings, concrete fill, pipe fillets, lower fillets, top fillets, and related wall and slab placements.
- CSD performed concrete work for the screen room and pipe room, including slabs, walls, beams, pipe room beam, electrical room recess, top fills, wall openings, and fiber reinforced concrete fill.
B & R Electrical Contractors
- B & R Electrical Contractors, Inc. performed electrical work for the temporary pump manhole electrical scope on the St. Charles Pumping Station 7 project in Waldorf, Maryland.
- BRE’s scope included electrical work associated with the temporary pump manhole system, including temporary pump station controls coordination, conduit, wire, connections, CT cabinet, main circuit breaker, grounding, trenching, backfill, and electrical permitting.
- Major work included plywood backboard installation, conduit installation, wire and connection work, PVC conduit below grade, rigid metal conduit on exposed work, new CT cabinet, main circuit breaker, grounding of equipment and support rack, and trenching and backfill for conduits.
- BRE coordinated with the temporary pump station control panel, pumps, cellular dialer, automatic transfer switch, and control panel supplier for packaged pump station control equipment.
- BRE provided shop drawing and O&M manual review support, coordinated material delivery, coordinated temporary electrical service work, and provided as-built / record drawings upon project completion.