The U.S. Army Corps of Engineers updated the application of the Munitions Response Site Prioritization Protocol at Illinois Ordnance Plant (Crab Orchard). Illinois Ordnance Plant (Crab Orchard) was used for ordnance production from 1941 until 1945. After Illinois Ordnance Plant (Crab Orchard) was closed, the property was transferred to other government agencies and private parties.
Illinois Ordnance Plant (Crab Orchard) is one of many former military installations throughout the United States reviewed under the Department of Defense's Munitions Response Site Prioritization Protocol. This protocol is used to assess Formerly Used Defense Sites that may have unexploded ordnance, discarded military munitions or munitions constituents, and to guide future investigations or munitions removal activities at these sites.