Problem During a time of increasing commercial development in Clarksville, Indiana, the city of Clarksville noticed unusually high levels of water at its Pump Station 10 (PS10) which caused a strain on its wastewater treatment plant (WWTP). During high rain events, some pump stations experienced a 500% increase in flow and the WWTP experienced a 300% increase. Due to budgetary constraints, the city put off repairs as long as possible, but was forced to address the issue when it threatened their ability to sign future capacity letters for new commercial developments. Analysis To determine the cause of the problem, flow monitoring was conducted starting at PS10. The monitoring tracked the issues back to a gravity outlet at Pump Station 33 (PS33). CCTV sewer inspection determined that

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