Elmhurst, IL — Scheduled Rock Blasting was performed at the Elmhurst Quarry on Friday September 16th at 4:25 p.m. Ludwig Explosives, a contractor who has been hired by the City of Elmhurst, performed the scheduled rock blasting in conjunction with the Walnut/Myrtle/Evergreen Stormwater Improvement Project. The contractor sounded a series of horns in the minutes leading up to the actual blast. The blast itself lasted only a few seconds, but these sounds may have been noticed by anyone who was close to the area.