The County of DuPage
Wheaton, Illinois

Klein Creek Flood Mitigation Project

Klein Creek Rendering 

The Klein Creek Flood Mitigation Project began early June 2014. The project along Klein Creek in Armstrong Park, located in Carol Stream, is a joint effort between DuPage County Stormwater Management, the Village of Carol Stream and the Carol Stream Park District to alleviate flooding in the area. In order to do this, DuPage County will construct a two-reservoir system that will operate when water elevations in Klein Creek increase in order to divert floodwaters from the majority of the nearby Armstrong Park neighborhood. Reservoir One will take in water directly from Klein Creek and upon reaching a specific elevation, water will be pumped into Reservoir Two—a much larger storage reservoir. 

Construction has been split into three phases. Phase I includes construction of a gravity-operated flood control reservoir to detain floodwater, as well as construction of a larger storage reservoir with a pump station located where the southern portion of Lake George is today. Phase II involves construction of the pump station to move water from the gravity-operated reservoir into the larger storage reservoir. Finally, Phase III includes installation of a 60-inch siphon under Arrowhead Trail, Indianwood Drive and Thunderbird Trail to convey water from the reservoirs back into Klein Creek once river elevations have subsided following flood events. Construction of all three phases is expected to be completed in spring 2015. 

Construction Updates

After a wet start to the week (water levels were still a bit high on Monday), construction was able to continue with installation of storm sewer, construction of the overflow structure near the 60-inch siphon outlet, and earthwork activities related to the gravity reservoir.  All HDPE (plastic) storm sewer has been installed. There is concrete pipe remaining to be installed, which will need to be coordinated between our two contractors. The overflow structure is currently formed and crews are working on finalizing placement of rebar for a scheduled concrete pour of next week Tuesday. Other activities expected to occur next week include grading for the gravity reservoir and preparation for future concrete work associated with weir structures and the pump station.  Mobilization for Phase III work (the 60” siphon) is also expected to begin next week. There is currently one excavator staged on Indianwood Drive. The County is currently in the process of working with the Village to approve a traffic control plan.  Signs will be placed to warn the public in advance of any closures and actual work for Phase III is expected to commence on July 21, 2014.

    Planning Exhibits


    Klein Creek Watershed Plan

    The Klein Creek Watershed Plan Addendum No. 2 was included in West Branch DuPage River Interim Watershed Plan.