Construction of Deep Tunnel Will Reduce Overflows and Energy Consumption

Dec. 14, 2011

Tunnel will reduce carbon footprint and operating costs in Kansas

Excavation of a 110-ft-deep entrance shaft signals the beginning of site work in the construction of an underground tunnel and pipeline designed by Black & Veatch to carry as much as 180 million gal per day (mgd) of treated wastewater by gravity nearly two miles from Johnson County Wastewater’s Mill Creek wastewater treatment plant in Shawnee, Kan., to a discharge point downstream of a water intake on the Kansas River.

An average of 10 mgd of plant effluent currently is pumped to the same discharge location, but a new means of conveying the effluent was necessary because the existing pumping station and force main do not have the capacity to pump extreme wet-weather flows. The tunnel will eliminate the risk of untreated wastewater flows into nearby Mill Creek and the Kansas River that periodically results with heavy rains.

When completed in late 2013, the tunnel will reduce the county’s carbon footprint and operating costs by eliminating the current need for electricity to pump the effluent. It is estimated to save more than $200,000 annually in moving ultimate future flows, which will partially offset the cost of the essential upgrade.

The pumping station and force main will be taken out of service after completion of the project, which includes construction of new plant piping to convey treated wastewater from the plant’s final treatment processes to the tunnel as well as piping within the tunnel. Black & Veatch designed and is providing construction services for the project.

S.J. Louis Construction of Texas leads construction of the 110- to 180-ft-deep tunnel, in which a 96-in.-diameter, fiberglass-reinforced pipe will be grouted into place. Design and construction challenges include tunneling adjacent to the Kansas River through methane-containing shale and the potential for high groundwater inflows in the shaft excavations.  
 

Source: Black & Veatch

Sponsored Recommendations

Get Utility Project Solutions

June 13, 2024
Lightweight, durable fiberglass conduit provides engineering benefits, performance and drives savings for successful utility project outcomes.

Meeting the Demands of Wastewater Treatment Plants

May 24, 2024
KAESER understands the important requirements wastewater treatment plant designers and operators consider when evaluating and selecting blowers and compressed air equipment. In...

Modernize OT Cybersecurity to Mitigate Risk

April 25, 2024
Rockwell Automation supports industry-leading Consumer Packaged Goods company, Church & Dwight, along their industrial cybersecurity journey.

2024 Manufacturing Trends Unpacking AI, Workforce, and Cybersecurity

April 25, 2024
The world of manufacturing is changing, and Generative AI is one of the many change agents. The 2024 State of Smart Manufacturing Report takes a deep dive into how Generative ...