LocationAccokeek, Prince George's County, Maryland
MarketWastewater Treatment Plants
TURNKEY GRIT BUCKET ELEVATOR REPLACEMENT, MECHANICAL/ELECTRICAL INTEGRATION, TESTING AND COMMISSIONING.
Johnston Construction Company
- Performed a substantial rebuild of Grit Bucket Elevator No. 3 at the operating Piscataway Water Resource Recovery Facility.
- Delivered a complete turnkey grit bucket elevator replacement including equipment supply, installation, testing and commissioning.
- Replaced the existing system with a new three-shaft continuous-bucket grit elevator integrated into the existing grit handling process.
- Coordinated installation within the existing structural openings and operating footprint without disrupting adjacent WRRF operations.
- Installed the new drive system including motor, gear reducer, sprockets, chain-drive components and torque-limiting protection.
B & R Electrical Contractors
- Performed electrical construction associated with the rebuild of Grit Bucket Elevator No. 3 at the active Piscataway WRRF.
- De-energized and isolated the existing grit-system electrical equipment using coordinated lockout/tagout procedures.
- Disconnected and removed existing conduit and wiring serving the existing Grit System Control Panel No. 3 and associated remote devices.
- Installed new PVC-coated rigid steel conduit and wiring for the replacement grit bucket elevator system.
- Connected the new bucket elevator motor and associated control devices.