LocationCharlotte Hall, St. Mary's County, Maryland
MarketWater Storage and Tanks
400,000-GALLON PEDESPHERE FOUNDATION, SITEWORK, PIPING, ELECTRICAL & INSTRUMENTATION.
Johnston Construction Company
- Johnston Construction Company served as Civil Subcontractor to Caldwell Tanks, Inc. for construction of the new 400,000-gallon spheroidal/pedesphere elevated water storage tank and water station in Charlotte Hall, Maryland.
- Performed the major civil, foundation, site-development, piping, mechanical, electrical and instrumentation portions of the Charlotte Hall installation in accordance with Caldwell's subcontract scope and the St. Mary's County Metropolitan Commission contract documents.
- Provided project mobilization and the required Charlotte Hall base-bid site work associated with the water tower and water station.
- JCC performed erosion and sediment-control work, including measures to maintain positive site drainage and protect prepared subgrades from saturation during construction.
- Coordinated construction staking, geotechnical evaluation and field testing associated with the tank foundation and site development.
Concrete Services Division
- Performed specialized formwork, concrete placement, finishing and curing for the tank foundation in accordance with the project drawings, concrete specifications and Caldwell-issued foundation requirements.
- Completed approximately 2,332 square feet of concrete formwork associated with the foundation, slab-on-grade and curved-wall construction.
- CSD constructed the curved foundation-wall formwork, representing the largest single formwork component of the subcontract, together with footing and slab-edge forming.
- Furnished the labor, form materials and related equipment required for footing forms, slab-on-grade forms and curved-wall forms, including rental and purchase of form systems as required.
- Placed approximately 146 cubic yards of concrete across the footing, slab-on-grade and curved-wall elements of the tank foundation.