Severn Trent Services has been awarded a contract by the City of Detroit to integrate the disinfection system and supply equipment for the chlorination process at the city's new Detroit Water Works Park II treatment facility.
In late 1998 the Detroit Water and Sewerage Department (DWSD) contracted with the Detroit Water Team to design, build, and maintain a new 240 mgd (expandable to 320 mgd) water treatment plant. The Detroit Water Team is a consortium of engineering and construction firms led by Black & Veatch and including MWH Global Inc., J.S. Alberici Construction Co., Walsh Construction Company, and Motor City Electric. Hazen and Sawyer, P.C., is providing oversight services to DWSD.
When it begins operation in the fall of 2002, the $275 million Water Works Park II Water Treatment Plant will replace an existing treatment plant and provide high quality drinking water to DWSD customers throughout southeastern Michigan. It will combine ozonation technology and a high-rate, monomedia filtration system and be controlled by a state-of-the-art automation system.
New facilities include a low-lift pump station, chemical facilities, pretreatment, intermediate ozonation, rapid-rate monomedia filtration, finished water storage, residuals handling and treatment facilities with waste wash water equalization, plant overflow facilities, and an administration building. Intake and several other existing facilities will be modified as necessary and incorporated into the new plant.
To provide the city with the required chlorination systems, Severn Trent Services has integrated various technologies to complement the supply of Capital Controls™ chlorinators, leak detection and emergency shut-off systems. Some of the integrated technologies include electrically operated valves, PLC interface, and scales to measure the amount of chlorine used in the process.
A 60-month schedule was established for the design-build delivery of new facilities for the water project, as well as the demolition and rehabilitation of existing structures, with a 7-year maintenance period scheduled to commence upon substantial completion of the design-build phase.
In addition to a meeting the fast-track schedule, the DWSD and the Detroit Water Team is challenged by the need to keep existing treatment facilities in operation throughout construction. WW/
