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LAWRENCE, KAN. — McCarthy Building Cos. Inc. will build a $70 million improvement project for the Kansas River Wastewater Treatment Plant located at 1400 E. 8th St. in Lawrence. The project marks the city’s second-largest funded wastewater project. The improvements are required to meet the National Pollutant Discharge Elimination System regulatory permit requirements issued by the Kansas Department of Health and Environment. The plant, which receives nearly 80 percent of the city’s wastewater, originally opened in 1956 and has an average daily flow of 8 million gallons per day. Preconstruction efforts are underway, with official groundbreaking slated for May 2023. Completion is scheduled for fall 2026.