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The County of DuPage
Wheaton, Illinois

Press Release

Contact Information: Mary Mitros 630-417-1004

Wednesday, September 3, 2014

DuPage County Stormwater Management Pauses Pump Back Operations at Elmhurst Quarry

DuPage County Stormwater Management has temporarily ceased pump back operations of the Elmhurst Quarry Flood Control Facility following the August rainfall. This pause in operation is in response to an irregular odor noticed by nearby residents. DuPage County staff has identified the cause of the odor as an algal bloom in the east lobe of the Quarry.

Per the operating plan, floodwater collected in the Elmhurst Quarry from recent rain events was beginning to be pumped back into Salt Creek on Wednesday in order to increase the Quarry’s capacity for future rain events. County staff began this process after confirming river elevations in the adjacent Salt Creek had receded enough to handle the excess water. However, the lack of oxygen in the stored floodwater caused the algal bloom, which can occur in streams, ponds, lakes and even oceans.

County staff is currently treating the issue by re-oxygenating the standing water. Once the algal bloom is treated, pump back operations will resume as normal. Note that there is no threat of raw sewage entering the Elmhurst Quarry.