Prospect sewer line repair update:
Work to connect the new force main to the undamaged portion of the original force main is nearly complete with the construction of valve vaults on each repair site. These large concrete vaults or boxes also allow workers future access to the sewer line to alter or control flow.
The force main and the pumping station on the Ken Carla side should be in service early next week, allowing workers to isolate the broken gravity line and original force main for repairs. All efforts continue to complete this project in early May despite recent setbacks, which include river flooding.
Updates are available on our website at LouisvilleMSD.org and on our Twitter page @LouisvilleMSD.
You may reach MSD Customer Relations at 502.540.6000.
Repairing the broken sewer line that runs 35-feet below the surface, under U.S. 42 and twice under Harrods Creek, is a complicated process. Under the ground is a large casing pipe that holds two pipes inside of it. One of the smaller pipes is a 42-inch gravity sewer line. The other pipe is a 30-inch force main, which is a sewer line that flows by the force of pumps instead of gravity. A discharge—or sewer leak—was reported on the Woodlands side of the creek in late November. Excavation work on that side of the creek revealed that the break is more than 750-feet from where the discharge was reported. It is actually under the land in the bend of the stream. The discharged stayed inside the larger casing pipe and flowed to the Woodlands area, making its way up to the surface.
To make such a long repair, MSD needs access from both sides of the break. That is why crews mobilized in the Ken Carla area. The work is taking place mainly on the site between MSD’s pump station and the creek.
MSD installed temporary access roads to allow heavy equipment to reach both repair sites. Construction of a shaft 35-feet below ground is complete on the Woodlands site. Another shaft is needed on the Ken Carla side. The shafts are metal boxes with reinforcing to hold back the soil and protect the crews as they work.
No one will lose sewer service during the repair.
There have been no additional discharges to the creek since the originally reported 1,050,000 gallons. And MSD continues discussions with the state and all regulatory agencies concerning the situation.