Workflow Evansville

EWSU's 6.1 Million Gallon CSO Storage Basin Project Receives ‘Concrete Achievement Award’

Evansville Water and Sewer Utility (EWSU) is proud to receive the 2022 Concrete Achievement Award for the West Wastewater Treatment Plant 6.1 million-gallon CSO Storage Basin Project. The award, from the Indiana Ready Mixed Concrete Association, recognizes excellence in concrete construction. This project consisted of approximately 15,725 cubic yards of placed concrete.  If this quantity of concrete was used to construct a standard urban sidewalk 4’ wide by 4” thick, the sidewalk would extend over 60 miles! Given a lap around the Indianapolis Motor Speedway is 2.5 miles, this sidewalk could take 24 laps around the track! Or, about the same distance from Disney World in Orlando, Florida all the way to Daytona Beach!

Within the concrete is 1,280 tons of rebar, or 2,560,000 pounds.

The storage basin collects combined storm and sanitary sewage overflow (CSO) from Evansville’s North and West sides during heavy rain events, preventing untreated water from discharging into the environment. The wastewater is held in the storage basin until it can be treated at the West Wastewater Treatment plant. The treated water is then released into the Ohio River.

Greeley and Hansen designed the storage basin, Irving Materials, Inc. supplied the concrete, and Kokosing Industrial, Inc. built the structure. The project began in January 2019 and was completed in early 2021.

YouTube: View a slideshow of the storage basin under construction: