The Lake County Public Works Department (LCPW) identified a predominately wet-weather force main that needed to be replaced due to break history and the related Sanitary Sewer Overflows (SSO’s) that occurred.

Prior to identification of the project, LCPW had an analysis completed to identify locations to reduce SSOs during wet weather events due to the high inflow and infiltration (I&I). The County has identified long-term goals for reducing I&I, but until those initiatives are completed, increasing the capacity of the pumps and force mains will reduce the surface discharges in the service area.

Additional flow reports and coordination were provided to the IEPA for justification to increase the diameter of the force main from 10” to a 12” and demonstrate that minimum design velocity in the force main would be maintained.

During the design, GHA developed a proposed alignment that minimized property impacts, prepared and negotiated easements over the Round Lake High School property that placed the force main away from existing improvements on the property. The force main design also eliminated unnecessary crests and sags.