McDowell Grove Dam Modification
The Civilian Conservation Corps constructed the McDowell Grove Dam in the 1930s. The dam created a small recreation lake used by Camp McDowell Army Base that was located in the now, McDowell Grove Forest Preserve. The dam was found to severely impact
water quality on the West Branch DuPage River, as well as limit fish passage and recreational opportunities. To modify the dam, DuPage County received a $1.6 million grant from the Natural Resource Conservation Service. Completed in November 2008, the dam modification corrected the existing impoundment.