Nicholson Construction has recently completed a diaphragm wall for Louisville and Jefferson County Metropolitan Sewer Waterway Improvements Now (WIN) programme.
The WIN programme was created to control sewer overflows and improve water quality in the Louisville area for nearly 700,000 residents.
The first part of the WIN project included the installation of multiple basins to retain a mixture of rainwater and sewage during heavy rain events that would gradually be released for treatment rather than overflowing the system and polluting waterways.
Contracted by Dugan & Meyers, Nicholson installed a 1.07m thick, 72.8m diameter concrete diaphragm wall to act as a temporary support of excavation shaft.
Nicholson also installed 232 vertical tiedowns to ensure that the basin’s structural foundation mat would resist uplift pressure.
Nicholson Construction senior vice president John Wise said: “We worked closely with Dugan & Meyers and the owner’s engineer to develop a value-engineered design concept that resulted in significant cost and schedule savings to the project.”
The WIN project is expected to be completed in 2024.
Watch the video of the project highlights here.