Main Interceptor Cleaning Huntington, WV
Taplin utilized one of our large diameter cleaning units capable of producing 200 gallons per minute at 2500 PSI operating pressure to deliver flow to the cleaning equipment. Taplin had to run 1 ½” high pressure hose in excess of 3,500 lineal feet through an easement to reach the remote reel stationed at each manhole. The remote reel was transported and powered by a John Deere Skid Steer. Even with the remote equipment, some of the manholes within our scope of work could not be accessed through the utility easement. This being said, Taplin provided reels capable of cleaning in excess of 2,500 lineal feet from one location.
The capacity of the sewer prior to cleaning was reduced by 40-60% due to the volume of debris. As the manholes are not accessible with conventional vacuum equipment, Taplin utilized hydraulic pump equipment to remove the debris from the sewer. This equipment has a smaller footprint and is able to be maneuvered through the easement with off road construction equipment that Taplin pulled from our Remediation Division for this project. Prior to mobilization, Taplin’s Fleet Maintenance Division fabricated two debris separation containers for this project. These containers (like the easement reels) could be pulled through the easement with construction equipment so they could be placed adjacent to each manhole where extraction was taking place. During the cleaning operation, the debris would be pumped from the sewer with the hydraulic dredge pump into the de-bris separation tank. The tank was specifically designed to allow enough surface area for the debris to settle out before another pump transferred the effluent back to the same manhole. Taplin utilized a PC-138 excavator to transfer the grit from the separation tank to a drying box where the material was allowed to dewater further before being transported into open top roll off boxes. This process allowed a continuous cleaning operation negating the need to shut down to dump.
Taplin provided an off-road CCTV/Sonar inspection unit to perform the inspection of each section once the cleaning was completed. Taplin has been able to restore each completed section to 100% hydraulic capacity.