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| Joliet Army Ammunition Plant | |
|---|---|
| Name | Joliet Army Ammunition Plant |
| Location | Will County, Illinois |
| Coordinates | 41.4995°N 88.0817°W |
| Built | 1940 |
| Used | 1942–1977 (primary), intermittent thereafter |
| Owner | United States Army |
| Area | ~19,000 acres |
Joliet Army Ammunition Plant was a large munitions manufacturing complex established in the early 1940s near Joliet, Illinois in Will County, Illinois. Built in response to mobilization for World War II, the facility produced propellants, explosives, and ordnance, and later supported the Korean War and Vietnam War mobilizations before partial closure in the 1970s. Its long operational history and subsequent environmental remediation have tied the site to federal programs and state agencies involved with land reuse and hazardous waste cleanup.
The plant was authorized amid the industrial expansion overseen by figures such as Franklin D. Roosevelt and executed within wartime frameworks influenced by the Selective Training and Service Act mobilization and the War Production Board. Early construction drew from suburban industrial planning models similar to those used for Rock Island Arsenal and other ordnance plants managed under the United States Army Ordnance Department. During World War II the site operated alongside facilities like the Savanna Army Depot and Navy Depot installations, expanding workforce housing in nearby Joliet, Illinois and stimulating links with railroads such as the Chicago, Burlington and Quincy Railroad. Postwar drawdowns mirrored trends at the Edgewood Arsenal and transfers to reserve status under the Base Realignment and Closure concepts of later decades, followed by intermittent reactivation for Korean War ordnance demands and later support during the Vietnam War logistics pipeline.
The complex encompassed manufacturing plants, storage magazines, detonation ranges, and support infrastructure similar to installations like Picatinny Arsenal and Rock Island Arsenal. Facilities included solvent extraction houses, mixing bunkers, melt and cast houses, and propellant finishing lines reminiscent of operations at Indian Head Naval Surface Warfare Center. Transportation infrastructure linked to the Pennsylvania Railroad corridor and local highways, enabling shipment to depots such as Tooele Army Depot and Redstone Arsenal. Operations were overseen by the U.S. Army Materiel Command and contractors with expertise comparable to firms that served Naval Ordnance Station Louisville and Lawrence Livermore National Laboratory on energetic materials. Security and safety practices were informed by standards from the Occupational Safety and Health Administration and historical ordnance manuals used across the Ordnance Corps.
Production spanned propellants, nitrocellulose-based powders, explosive charges, and metal-cased munitions components. The plant manufactured formulations similar to those used in M1 Garand and M2 Browning ammunition supply chains and produced components compatible with systems fielded by United States Army Air Forces and later United States Air Force platforms. Specific products paralleled those made at facilities like Radford Army Ammunition Plant and Lawrenceville Depot, including double-base propellants for artillery, small-arms propellant lots, and demolition charges comparable to ordnance used in campaigns such as the Normandy landings and Pacific Theater operations.
Decades of propellant production and storage led to contamination issues involving nitrocellulose residues, solvents, heavy metals, and propellant stabilizers analogous to contamination seen at Kennecott Utah Copper and former ordnance sites like Federal Creosote Works. Environmental assessments were conducted by agencies including the Environmental Protection Agency and the Illinois Environmental Protection Agency, with cleanup activities coordinated under programs related to the Comprehensive Environmental Response, Compensation, and Liability Act and Superfund processes used at sites such as Rocky Mountain Arsenal. Remediation employed soil excavation, groundwater pump-and-treat systems, and monitored natural attenuation, with oversight similar to that at the Hanford Site and other former defense production locations. Long-term monitoring addressed risks to the Des Plaines River watershed and groundwater used by communities in Will County, Illinois.
Following phased cessation of manufacturing, portions of the property entered reuse pathways involving the Department of Defense property disposal mechanisms and transfers to state and local entities in ways comparable to the redevelopment of Lowry Air Force Base and Bethlehem Steel Long Wharf. Redevelopment proposals included industrial parks, conservation easements, and mixed-use projects coordinated with the Illinois Department of Natural Resources and regional planning bodies linked to Chicagoland economic development initiatives. Land transactions involved federal land conveyance authorities and partnerships paralleling those used at former installations such as Fort Sheridan.
As with many ordnance plants, the site experienced accidental fires, detonations, and worker exposures over its operational history. Incidents were investigated by military safety authorities and labor oversight entities in fashions similar to inquiries at Titan II ICBM sites and industrial accidents at facilities like DuPont Chambers Works. Records document workplace safety actions, emergency response coordination with the Joliet Fire Department and county emergency management, and procedural changes that resembled safety reforms implemented across the ordnance production sector.
The plant influenced demographic and economic patterns in Joliet, Illinois and neighboring communities, generating employment like the wartime boom seen in cities such as Detroit and contributing to regional infrastructure improvements analogous to projects in Cook County, Illinois. Community responses included veterans' advocacy linked to organizations such as the American Legion and Veterans of Foreign Wars, and public interest in site reuse paralleled civic efforts at reclaimed military properties like Boston's Charlestown Navy Yard. Environmental advocacy groups and local historical societies documented the plant's legacy, contributing to interpretive projects and preservation initiatives comparable to those at other former defense sites.
Category:Industrial sites in Illinois Category:Former United States Army installations