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| Fort Lewis Ammunition Depot | |
|---|---|
| Name | Fort Lewis Ammunition Depot |
| Location | Pierce County, Washington, United States |
| Type | Ammunition depot |
| Established | 1940s |
| Closed | 1980s–1990s (decommissioned phases) |
| Controlledby | United States Army |
Fort Lewis Ammunition Depot
Fort Lewis Ammunition Depot was a major United States Army munitions storage and logistics complex adjacent to Fort Lewis (Washington), later part of Joint Base Lewis–McChord near Tacoma, Washington. The depot served as a strategic ordnance hub supporting theater-level sustainment for the United States Army during rapid expansions for World War II, the Korean War, and the Vietnam War. Its operations involved coordination with national logistics networks like the Army Materiel Command and regional transportation arteries including the Northern Pacific Railway and Puget Sound shipping routes.
The depot originated during the mobilization preceding World War II when the War Department sought expanded storage to support the American Expeditionary Forces logistical surge. Construction occurred amid broader base development at Fort Lewis (Washington), with initial facilities commissioned to hold conventional munitions destined for the Pacific Theater (World War II). Post‑war restructuring under the Department of Defense and the creation of the United States Army Material Command altered depot missions as Cold War contingency planning emphasized readiness for conflicts such as the Korean War and later the Vietnam War mobilization. Through the 1960s and 1970s the depot adjusted to evolving ordnance types, including conventional artillery, small arms ammunition, and explosive components tied to programs overseen by the Office of the Secretary of Defense. Base realignment and closure debates during the late 20th century, influenced by the Base Realignment and Closure Commission (BRAC), ultimately led to phased downsizing and transfer of functions to installations such as McChord Air Force Base and privatized contractors.
Situated in Pierce County, Washington near Tacoma, Washington and the Puget Sound, the depot occupied secured tracts contiguous with Fort Lewis (Washington). Facilities included reinforced earth-covered magazines, rail-served warehouses linked to the Northern Pacific Railway and later BNSF Railway corridors, maintenance shops, and specialized handling yards compliant with directives from the Ordnance Corps. Support infrastructure comprised administration centers, an explosives ordnance disposal range used in training with units drawn from EOD (United States military), and waterway access for transshipment via Naval Base Kitsap era maritime nodes. The site’s geography—temperate maritime climate and glacially derived soils—affected storage designs and drainage planning pursuant to Federal specifications influenced by the National Environmental Policy Act era guidance.
Operations centered on receipt, inspection, preservation, issue, and demilitarization of munitions for Army formations including divisions preparing at Fort Lewis (Washington), rotating units bound for the Pacific Theater (World War II), Eighth United States Army, and later tactical elements deploying to Southeast Asia. Depot personnel included civilian ordnance specialists, enlisted ordnance soldiers from the Ordnance Corps (United States Army), and logistics planners coordinating with the Defense Logistics Agency. Units and tenant activities encompassed ammunition supply points supporting mobilization exercises, explosive ordnance disposal detachments, and cooperation with federal entities such as the Bureau of Alcohol, Tobacco, Firearms and Explosives during demilitarization. Training liaison occurred with nearby installations like Fort Lewis (Washington), and airlift coordination involved assets at McChord Air Force Base.
Long-term storage and demilitarization operations produced contamination issues typical of ordnance facilities, including soil and groundwater impacts from explosive residues, heavy metals, and petroleum hydrocarbons. Regulatory engagement involved the Environmental Protection Agency and the Washington State Department of Ecology under statutes influenced by Comprehensive Environmental Response, Compensation, and Liability Act and the Resource Conservation and Recovery Act. Remediation measures implemented included removal of unexploded ordnance, in‑situ treatment, excavation of impacted soils, and long‑term monitoring programs modeled on precedents from remediation at sites such as Rock Island Arsenal and Raritan Arsenal. Community advisory panels and interagency workgroups coordinated reuse planning with stakeholders from Pierce County, Washington and the City of Tacoma, Washington.
Throughout its operational life the depot experienced several notable accidents and incidents characteristic of high‑hazard ordnance storage. Documented events included mishandling fires, accidental detonations during munitions consolidation, and training‑related explosions involving ordnance technicians. Response operations involved local emergency services from Tacoma Fire Department and federal response teams, including Explosive Ordnance Disposal units and coordination with the Federal Emergency Management Agency. Investigations prompted procedural changes aligned with standards from the Occupational Safety and Health Administration and revisions to munitions handling doctrine issued by the Ordnance Corps (United States Army).
Decommissioning occurred in phases as strategic consolidation and Base Realignment and Closure Commission (BRAC) decisions reallocated munitions missions to other depots and privatized contractors. Transfer and reuse planning engaged regional development agencies, leading to partial conversion of former storage tracts for industrial parks, conservation parcels, and municipal infrastructure projects coordinated with Pierce County, Washington planning authorities. Cleanup completion and property conveyance followed procedures used in other base conversions such as Presidio of San Francisco and Fort Ord, balancing heritage preservation, economic redevelopment, and ongoing environmental monitoring requirements under agreements with the Environmental Protection Agency.
Category:United States Army arsenals and depots Category:Pierce County, Washington military installations