Washington Wastewater Treatment Plant Expansion

Project Type: Water & Wastewater,

Size: 6 Million Gallons per Day

Owner: City of Washington, MO

Location: Washington, MO

KCI Role: General Contractor

Value: $19,840,000

Delivery Method: Bid Build

Completion Date: 2000

Designer: Jacobs

In order to facilitate the forward thinking of the City of Washington, Missouri, officials gained public support for bonds to fund the largest public works project in the city’s history, with KCI winning the bid for the construction. The plant is classified as a “compact plant” because the plant footprint is fairly small compared to other facilities. Due to the need to treat 4 MGD and eventually 6 MGD on a restricted site, the plant was designed as a Vertical Loop Reactor system which was the first of its kind built in Missouri. Additionally, the new plant includes a “cannibal” sludge system that virtually eliminates the need to dispose of sludge byproduct, which is a costly ongoing expense for many plants. The new plant consists of an influent pump station, Administration & Headworks building, 4-cell VLR, two 90′ diameter Clarifiers, Sludge Pump Station, UV Structure, and Effluent Pump Station. Piping connects the new plant to the existing plant via a 48″ diameter boring under the high-speed railroad.