US Army Awards $2.3 Billion Hawthorne Depot Contract Covering Two Decades of Ammunition Demilitarisation

Technical Summary

The United States Army awarded Day & Zimmermann Hawthorne Corp. a $2,301,227,487 firm-fixed-price contract on 9 June 2026 for the operation, maintenance and modernisation of Hawthorne Army Depot, Nevada, including demilitarisation of specified families of ammunition and supply depot operations. The award (contract number W519TC-26-D-A018) was competed with four bids received and runs to an estimated completion date of 29 December 2046, a period of performance of just over twenty years. Army Contracting Command, Rock Island Arsenal, Illinois, is the contracting activity. Work locations and funding will be determined with individual orders. The contract also carries 14 additional performance work statements covering safety, security, fire and emergency services, environmental management, government property, information technology and occupational health.

Hawthorne Army Depot is described in the award notice as the largest joint storage depot under Joint Munitions Command (JMC), the US Army organisation responsible for conventional ammunition storage, distribution and demilitarisation. The site holds war reserve and training stocks across the full span of conventional natures and hosts one of the principal demilitarisation workloads in the US inventory. Day & Zimmermann is the long-standing incumbent operator at Hawthorne, with a site relationship publicly dated to the 1980s, making this award a continuation and recapitalisation of an established contractor-operated arrangement rather than a transition to a new operator.

A $2,301,227,487 firm-fixed-price award for operation, maintenance and modernisation of Hawthorne Army Depot, including demilitarisation of specified families of ammunition, running to 29 December 2046. US Department of War contract announcement, 9 June 2026

Analysis of Effects

The twenty-year horizon is the most analytically significant feature of the award. Demilitarisation programmes are conventionally funded in short increments, which suppresses contractor investment in plant. A two-decade vehicle with an explicit modernisation line changes that calculus: it allows capital recovery on closed-disposal technologies such as automated disassembly, cryofracture, washout and energetic-material recovery, and on resource recovery and recycling (R3) streams that reclaim metals and energetics rather than destroying them. It also signals that the US Army expects the conventional ammunition demilitarisation backlog, which has persisted at six-figure short-ton levels for years in public reporting, to remain a multi-decade workload rather than a clearance task with an end date.

The award also lands in a week of broader US munitions infrastructure spending. The same announcement cycle included a $22.1 million construction award for a B-21 munitions maintenance facility at Ellsworth Air Force Base, and the wider fiscal 2027 budget request reportedly carries over $26 billion in multi-year munitions procurement. Storage, surveillance and disposal capacity is the unglamorous tail of that build-up: every round procured at scale eventually becomes a storage, surveillance and demilitarisation liability, and Hawthorne is where a large share of that liability is worked off for the US stockpile.

Personnel and Safety Considerations

Demilitarisation is among the highest-risk activities in the ammunition lifecycle because the condition of energetic materials in time-expired stocks is uncertain by definition. Items presented for breakdown may exhibit exuded or crystallised fillings, degraded propellant stabiliser levels, corroded metal parts or fuzes in unknown states, all of which alter the hazard from the as-designed configuration. Operations must therefore be conducted under explosion safety quantity-distance (QD) siting, with process buildings treated as potential explosion sites (PES) and Net Explosive Quantity (NEQ) limits set per workstation, observing Hazard Division (HD) and Compatibility Group (CG) segregation throughout. The progressive shift from open burn and open detonation (OB/OD) towards closed-disposal technologies, driven in the United States by environmental regulation and litigation pressure, transfers risk from the environment to engineered plant and makes the modernisation element of this contract a safety investment as much as a throughput one.

Data Gaps

The award notice does not state: which families of ammunition are specified for demilitarisation; planned annual demilitarisation throughput in short tons; the balance between OB/OD and closed-disposal methods at Hawthorne under the new contract; the value and phasing of the modernisation investment; workforce numbers; or the breakdown between demilitarisation, storage operations and the 14 support-function work statements within the $2.3 billion ceiling. Task-order data over the first option years will be needed to resolve these. ISC has not independently verified figures for Hawthorne's current storage occupancy or magazine count and has deliberately excluded commonly repeated but unsourced site statistics.

Corrections & updates welcome. If you hold open-source data that refines or corrects any parameter in this article, please contact [email protected] citing the specific claim and your source. Verified corrections will be incorporated and credited in the revision history. AI-assisted technical assessment based on open-source material. Not a formal intelligence product.