A growing population, aging infrastructure and more stringent effluent limits spurred the need for a large-scale expansion of the Tomahawk Creek Wastewater Treatment Facility, which first began operations in 1955 in Johnson County, Kan.

Stabilizing a quarry where rockfalls threatened to crush critical infrastructure under construction demanded a meticulous approach and required workers to rappel slopes to remove loose material.

After years of rising odor complaints and operating costs, a $32.5-million facility provided a sustainable solution by replacing the existing belt filter presses and lime stabilization process with a centrifuge dewatering and drum drying process.

As part of the federal permanent injunction regarding culvert corrections, this $25-million design-build project corrected two fish barriers and replaced them with four fish passable structures.

As the city of Logan's largest-ever capital improvement project, this effort replaced an existing 460-acre open-air wastewater lagoon complex with an 18-million-gallon-per-day regional wastewater treatment facility.

As part of an extensive modification effort, this project’s scope of work included enclosing the Steinaker Service Canal within a pressurized pipeline and installing more than 15,000 linear ft of 78-in. solid wall high density polyethylene (HDPE) pipe.

Located at an elevation of 8,000 ft, Northern Water supplies water to more than 1 million people and 615,000 irrigated acres in Northeastern Colorado.

The South Platte Renew Water Recovery Facility treats approximately 20 million gallons per day of residential and industrial wastewater from 300,000 residents in connecting communities.

Differing site conditions posed significant challenges for the contractor and the design team for this wetlands restoration project.

To eliminate sewer overflows into Lake Erie, increase treatment capacity and improve the quality of the treated water at this aging water pollution control center (WPCC), upgrades included a 15-million-gallon storage basin, new headworks, relief sewer and a new membrane bioreactor process within the existing tankage.