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

Phase I

Construction is progressing with continued importing of clay material for construction of the clay core of both reservoirs.  Unsuitable material has been removed from the area and topsoil is currently stockpiled on site for future use during restoration.  Plant plugs are currently being installed on the bottom of the gravity basin.  Despite the recent rain, the project is still expected to be completed on time.

Phase II

Construction of the pump station has continued.  The concrete foundation and concrete walls have been poured.  Work has also begun on the overflow weirs, with pouring of concrete for construction of the weir abutments.

Phase III

Installation of the 60” Ductile Iron Pipe has continued along Indianwood Drive.  All underground boring has been complete, with the remaining work including cutting open the roadway.  Installation of the pipe is expected to be complete by the end of October and paving of the disturbed roadways is expected to follow shortly thereafter.

Planning Exhibits


Klein Creek Watershed Plan

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