In Shelbina, Missouri, the population was declining, wastewater infastructure was aging and new permits required the city to address inflow and infiltration issues (I/I) and eliminate its secondary outfall. 


McClure presented Shelbina officials with a plan on how to budget, prioritize, and methodically repair defects to the collection system and reduce I/I. This priority ranking took into account the area’s impact on the wastewater treatment plant flows and the costs of rehabilitation.

McClure developed one of the first No Feasible Alternatives Analyses in Missouri. Because the No Feasible Alternatives Analysis showed that eliminating the secondary outfall was not possible within the limits of Shelbina’s Voluntary Compliance Agreement (VCA) with the Missouri Department of Natural Resources, McClure worked with the City to develop a Wet Weather Operations Plan and a Capacity, Management, Operations and Maintenance (CMOM) Program.

Three years into the recommended collection system repairs, Shelbina has started to see reductions in the amount of I/I entering its treatment facility. By leveraging a newly allowed process of blending, the city has the opportunity to effectively eliminate the secondary outfall, as was required by the VCA, in an economically and environmentally feasible way.

Location: Shelbina, MO
Client: City of Shelbina, MO
Scope: Wastewater System Improvements
Expertise: Water