Nicholson Wraps Up Phase Two of Louisville's Portland CSO Basin Project

April 19, 2018

Geotechnical general contractor Nicholson Construction recently completed their second contract for Kentucky’s Louisville and Jefferson County Metropolitan Sewer District’s Waterway Improvements Now (WIN) program.

The WIN program was created as an aggressive response to a Federal Consent Decree to control sewer overflows and improve water quality in the Louisville metro area for its nearly 700,000 residents.

The first part of the WIN project, which must be in place by 2020, 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.

Nicholson was contracted by general contractor Dugan & Meyers to install a 42-inch thick, 239-foot diameter concrete diaphragm wall to act as a temporary support of excavation (SOE) shaft.  

The second part of Nicholson’s contract involved the installation of 232 vertical tiedowns to ensure that the basin’s structural foundation mat would resist uplift pressure.

“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,” said John Wise, Senior Vice President, Nicholson Construction. "We're very proud of the CSO work we've completed all over the country and this project is no exception."

Nicholson’s work wrapped up in early April. The overall WIN project will continue through 2024.

To see some highlights of the two phases, watch the video here:

About Nicholson Construction Company

Nicholson has been both a leader and an innovator in the geotechnical construction industry for more than 60 years. With regional offices across the country and headquarters located in Pittsburgh, Nicholson is a nationally renowned specialty contractor, offering proven expertise in the design and installation of deep foundation elements, earth retention systems and ground treatment solutions. We pride ourselves on our ability to consistently provide our clients with innovative, high-quality design-build options for projects of varying size and complexity. Nicholson is the North American subsidiary of Soletanche Bachy, one of the world's leading geotechnical contractors, and is part of a global network of unparalleled geotechnical resources and expertise.