Lamp Rynearson was hired in 2015 to evaluate the performance of and recommend improvements to the City’s two lagoons to meet future effluent limits. The report was completed ahead of schedule and the results presented to the City Council. At the time, municipal lagoons served the City was the fourth largest city in the state of Kansas utilizing wastewater lagoons. Both City staff and our experts recommended construction of a new mechanical plant. Lamp Rynearson completed an antidegradation evaluation as required by Kansas Department of Health and Environment (KDHE), a facility plan, and assisted the City with Kansas State Revolving Fund (SRF) loan which included significant principal forgiveness.
The project which finished construction in 2021, included a new treatment plant at the south lagoon site, and a pump station at the north lagoon site and forcemain to the collection system upstream of the new facility. The $11.8 million-dollar project included the treatment plant, north pump station, and force main. The treatment plant includes influent pump station, modifications to existing lagoon cells for peak flow storage, headworks building with fine screen and grit removal, 0.7 million gallon per day (MGD) biological nutrient removal (BNR) oxidation ditch, clarifier, return/waste sludge pump station, UV disinfection, 24-inch outfall sewer, paved access drive, and an office/lab building. The North Pump Station also uses the existing lagoons for extraneous flow storage. The station includes three-850 gallon per minute submersible pumps with variable frequency drives that pump through 5,200 feet of 10-inch forcemain.