Coordination of Western Interceptor to Reduce CSOs a Monumental Effort

The capstone project of the City of West Lafayette's Combined Sewer Overflow Long-Term Control Plan included the construction of an interceptor sewer on the City's west side to convey sanitary-only flows to the wastewater treatment plant, thereby reducing CSO discharges during wet weather.A significant portion of the interceptor route was designed and constructed within the right-ofway of the Indiana Department of Transportation's US 231 Relocation Project. The Western Interceptor included deep cuts, high groundwater tables, construction in environmentally sensitive areas, railroad crossing, highway crossings, and installation within Purdue University golf course and cross-country course. Construction schedules were limited to non-traditional construction seasons to complete the work before the dates set for major athletic competitions. The design and construction were successfully completed under the regulations for the State Revolving Loan program. Coordination with INDOT, Purdue University and the City of West Lafayette was critical to the success of the project and led to cost savings for rate payers.