Illinois American Water Company (American Water Works Service Company, Inc.)
Project to attain the necessary disinfection credits to achieve Bin 2 compliance. All work designed for plant flow of 55MGD, with provisions for expansion to 75MGD (future connections provided to facilitate installation of new basins and filters to be constructed in future phases). Transfer Pump Station and Wetwell portion of project includes a below grade transfer wetwell (300,000 – 500,000 gallons) with two compartments to allow for isolation with intermediate baffle walls, allowing for gravity flow from existing filters and Aldrich units; four vertical turbine transfer pumps (55MGD) two pumps equipped with VFDs; four 24” UV reactors; traveling bridge crane; single-story building to house pumps, UV and electrical room. Clearwell portion of project includes two 5MG storage tanks designed to operate in parallel or in series and in isolation of one tank from service. High Service Pump Station portion of project includes design of an at-grade high service pump station consisting of four horizontal split-case high service pumps and two backwash supply pumps. Two high service pumps on VFDs at 4,160V, one additional pump on diesel power, traveling bridge crane, single story building to house pumps and electrical room.