TURNKEY DESIGN-BUILD WATER TREATMENT, SOLIDS REMOVAL, DEWATERING, PUMPING AND PROCESS SYSTEM UPGRADES.
Johnston Construction Company
- Delivered a turnkey design-build water treatment plant upgrade at the U.S. Naval Academy, including final design, engineering, permitting, construction, equipment installation, startup, testing and commissioning support.
- Constructed a comprehensive solids-removal and water-recovery system incorporating two lamella gravity clarifiers, two gravity thickeners and two centrifuge dewatering systems.
- Integrated a new filter-reject-water storage and pumping system to recover and recycle process water rather than discharge supernatant to the POTW.
- Installed new process infrastructure including a solids meter vault, valve vault, recycle-water pump station, thickener-overflow pump station and thickened-solids pump station.
- Constructed and equipped a new centrifuge building incorporating centrifuge dewatering equipment, polymer systems, solids conveying and truck-loading facilities.
Electrical Services Division
- Furnished labor, materials, tools, equipment and supervision for the electrical portion of the NSAA Water Treatment Plant – Water Conservation Project under JCC's design-build subcontract. ESD's subcontract specifically incorporates the NAVFAC/Constellation/JCC contract documents and identifies Constellation NewEnergy as the General Contractor and JCC as ESD's Contractor.
- Installed extensive conduit, wire, boxes, devices and electrical distribution infrastructure throughout the process facilities.
- Furnished and installed new electrical switchgear components associated with the project, including new breakers, transformers and disconnect switches where included in ESD's scope.
- Performed electrical demolition and modifications required to accommodate new treatment-process equipment and systems.
- Installed electrical connections for the new process equipment associated with the solids-removal, thickening, recycling and centrifuge systems.