LocationBrandywine, Prince George's County, Maryland
MarketWater Storage and Tanks
2.0 MG COMPOSITE TANK FOUNDATION, H-PILE SYSTEM, ALTITUDE VALVE VAULT, PROCESS PIPING, SITE DEVELOPMENT, STORMWATER MANAGEMENT AND UTILITY COORDINATION.
Johnston Construction Company
- Performed the major civil and mechanical construction package supporting WSSC’s new 2.0-million-gallon composite elevated water storage facility in Prince George’s County, Maryland. The overall facility included the elevated tank, site development, inlet and outlet piping, valves, vault, access roadway, stormwater-management facilities, electrical and instrumentation systems, and communications infrastructure.
- Constructed the deep H-pile foundation system supporting the new elevated water storage tank. JCC’s subcontract was based on approximately 91 H-piles with estimated lengths of 126 feet and included pile-installation oversight, survey layout, cutting, welding of cap plates, pile reinforcing steel, pile logs and associated foundation coordination.
- Managed an extensive foundation quality-control and testing program, including static pile-load testing, PDA testing, concrete testing, soils testing and subgrade bearing inspections with the required reports. These activities supported verification of the foundation system before construction of the approximately 2.0-million-gallon elevated structure proceeded.
- Completed significant tank-base and foundation-related construction, including antenna-conduit penetrations through the foundation, installation of CB&I-furnished foundation guyline anchors, hoist deadman preparation, the concrete floor within the tank base, required pipe supports, floor-drain piping and the tank personnel door.
- Installed the major civil and mechanical piping systems serving the elevated tank, including piping, valves, fittings, hydrants, supports and thrust blocks extending from the tank to the connection with the system water main. The overall facility utilized a 20-inch water connection between the elevated tank site and WSSC’s transmission system.
Concrete Services Division
- Concrete Services Division, LLC performed the concrete construction package supporting the Brandywine Elevated Water Storage Facility, a new 2.0-million-gallon composite elevated water storage tank constructed for WSSC in Prince George’s County, Maryland. The overall project included the elevated tank, inlet and outlet piping, valves, vault, access roadway, stormwater management, electrical, instrumentation, and related site improvements.
- CSD furnished the labor, materials, tools, forming, placement, finishing, and curing required for concrete associated with the altitude valve vault, tank foundation slab, derrick slab, structural walls and slabs, pipe pads, and grout work.
- The concrete package included approximately 415 cubic yards of concrete placement, together with approximately 4,521 square feet of concrete forming, including footings, slabs-on-grade, straight walls, and supported slabs.
- CSD performed approximately 9,258 square feet of concrete finishing and approximately 10,796 square feet of concrete curing, including float/screed work, machine troweling, point-and-patch work, bag finishing, and multiple curing applications.
- Concrete accessory work included vapor barrier, waterstop, premolded joints, sawcut joints, joint sealing, dowels, and 14 concrete pipe pads, along with labor associated with embeds, wall sleeves, thrust blocks, curbs, and other concrete components where required.