The City of Lafayette’s approved Combined Sewer Overflow Long Term Control Plan (CSO LTCP) requires full treatment of wastewater flows and a level of control of no more than four (4) CSO overflows during a typical year. To achieve this level of control, the recommended plan was divided into four sub-phases (Phase II-A, II-B, II-C and II-D). As a component of Phase II-B, the City is required to plan, design, construct, and place into operation a 4.2 million gallon (MG) CSO storage tank in the area near the existing CSO 001 diversion structure by the year 2020. The Greenbush CSO Storage Tank is required to store and convey wet weather flow to the Lafayette Waste Water Treatment Plant (WWTP) when the WWTP has capacity thereby improving the water quality in the Wabash River.
The Greenbush CSO Storage Tank project includes a 4.2 MG covered below grade storage tank, a building to house electrical and SCADA components, pumps and related equipment for tank dewatering in compliance with IDEM standards, a screening, and backflow prevention at a newly constructed CSO 001 outfall from the proposed 4.2 MG storage tank. Additional project components include yard piping, site work (including grading), and SCADA integration.