LocationOxon Hill, Prince George's County, Maryland
MarketWater Storage and Tanks
SITEWORK, WATER MAIN, VALVE VAULTS, STORM / OVERFLOW DRAINAGE, STORMWATER MANAGEMENT & SITE RESTORATION.
Johnston Construction Company
- Performed the major civil, sitework and underground utility construction associated with the St. Barnabas Elevated Water Tank Demolition and Replacement project in Oxon Hill, Maryland.
- Supported construction of a new 2.5-million-gallon composite elevated water storage tank, together with associated water-system piping, valves, vaults, site improvements and stormwater-management facilities. The overall WSSC project also included demolition of the existing 1-million-gallon elevated water tank and existing valve-vault facilities.
- Furnished, installed and maintained the project's required erosion and sediment-control measures throughout JCC's construction operations. Controls were required to be established before major earth disturbance and maintained until final stabilization and restoration were complete.
- Performed site clearing and grubbing within JCC's work limits, including removal and disposal of clearing debris and unsuitable materials that could not be incorporated into permanent construction.
- Managed existing topsoil stockpiles for reuse during final restoration and furnished supplemental topsoil where required.
Concrete Services Division
- Performed the specialized structural concrete forming, placement and finishing package for major underground water-system structures associated with the St. Barnabas Elevated Water Tank replacement project.
- Constructed the concrete components of the Altitude Valve Vault, including the slab, walls and supported top slab required for the underground valve facility.
- Constructed the concrete Flow Control Valve Vault, including slab-on-grade, vertical walls and supported top-slab concrete.
- Constructed the concrete Isolation Valve Vault, providing the structural concrete enclosure required for the project's isolation-valve system.
- Furnished and erected extensive concrete formwork for slabs-on-grade, straight walls, supported slabs and bulkheads associated with the vault structures.