Camp Navajo Ordnance Storage Upgrade

Ensuring the safety and serviceability for storage of ammunition.

Constructed in 1942, each existing ordnance storage igloo consisted of a fully enclosed moisture controlled consisting of a buried reinforced concrete arch ring (barrel) with waterproofing membrane, a reinforced concrete endwall with a concrete vent stack, a reinforced concrete headwall with a steel blast resistant security door. A conventional concrete slab footing with integrated draining system to ensure an environmentally controlled ordnance storage facility.

Construction of the reinforcement of the Headwall

Storage Facility Rehabilitation of the Headwall


State of Arizona Department of Emergency and Military Affairs

Bellemont, AZ

$170 K

Project Lifecycle

Multiple existing storage igloos received upgrades and rehabilitation activities. These activities included: stripping the earthen covering and waterproof material from the concrete barrel and replacing with modern waterproofing materials; replacing earthen backfill at gentler slopes; floor polishing that allows state of the art air pallet mobility equipment to be utilized; slab thickness additions for heavier ordnance capability; replacement of existing single access doors with a double door system and approach concrete apron replacement that allow access for larger ordnance.

Stripping of Earthen Covering

Earthen Covering exposing Concrete

Services included understanding current maintenance programs along
with the corresponding means and methods for accomplishing current rehabilitation work, providing recommendations for best practices that would promote more efficient and effective processes and methods, developing inspection training material for Camp Navajo staff, and providing construction inspection and materials testing.

Stripping of Earthen Covering

Dibble provided professional structural engineering services that consisted of compiling a structural assessment for more than 750 concrete Ordnance Magazine storage igloos. Dibble also advised and consulted the client regarding best practice recommendations for the development of an inspection program with options for any rehabilitation efforts required to ensure the safety and serviceability of the existing structures.