Take a behind-the-scenes tour of the Elmhurst Quarry Flood Control Facility, a historic site generally closed to the public. Participants will learn about the quarry’s history, visit various areas including private quarry platforms, and see how DuPage County Stormwater Management operates the facility to reduce flooding. Tours will depart from Elmhurst History Museum’s Education Center via bus every 30 minutes from 9:30 a.m. Some walking on uneven terrain and signed waiver required.