FUDS Program Links


Safety is a Priority

3Rs logo

Follow the 3Rs of Explosives Safety
if you suspect you may have come
across a military munition.

Recognize – when you may have
come across a munition, and that
munitions are dangerous.
Retreat – do not approach, touch,
move or disturb it, but carefully
leave the area.
Report – call 911 and advise the police
of what you saw and where you saw it.

Castle Dome Mountain Ordnance Area

Kofa National Wildlife Refuge is located in southwestern Arizona between the city of Yuma and the town of Quartzsite in La Paz and Yuma counties. The Corps of Engineers is investigating and monitoring this area through the Formerly Used Defense Sites, or FUDS Program, for munitions and explosive hazards that may remain from previous military activity. This page provides information on Castle Dome Mountain Ordnance Area, which is part of the Kofa National Wildlife Refuge FUDS.

The Castle Dome Mountain Ordnance Area project comprises 8,699 acres. It is located in the western section of Kofa National Wildlife Refuge and was identified as an ordnance dud area. Munitions including small arms ammunition, mortars, general purpose bombs and antitank practice mines are historically known to have been used in this area. Munitions debris consisting of projectile fragmentation, small arms ammunition, a base fuze from a general purpose bomb, a mortar and an anti-tank practice mine fuze have been found during previous inspections. Tank tracks have also been discovered in this area.

Today, the property is managed by the U.S. Fish & Wildlife Service as the Kofa National Wildlife Refuge. According to the U.S. Fish & Wildlife Service website, more than 80 percent of the Kofa National Wildlife Refuge is designated as wilderness. It offers visitors the opportunity to enjoy wildlife watching, photography, hiking, camping and limited hunting.

Based on available information, the Corps of Engineers has determined that additional investigations may be required for the Castle Dome Ordnance Area project. Because the area is designated as a wildlife refuge, it may be some time before the Corps of Engineers and the U. S. Fish and Wildlife Service determine the best course of action. Until then, the Corps of Engineers recommends that visitors follow the 3Rs of Explosives Safety (Recognize, Retreat, Report) if they may have encountered a munition.

As part of a Notification and Safety Education initiative for the FUDS Program, the Army Corps of Engineers mailed postcards to landowners within the project area.  The goal of the initiative is to raise awareness of the potential risks and hazards associated with FUDS properties and to reduce impacts to human health, safety and the environment until further response activities are initiated at the sites.  For more information, call the Formerly Used Defense Sites Information Center toll-free number 1-855-765-3837 or review the safety guides and maps located in the menu on the left.

Contact Information

For more information about the Kofa National Wildlife Refuge – Castle Dome Mountain Ordnance Area project, please call the U.S. Army Corps of Engineers, Los Angeles District Public Affairs Office at 213-452-3921.

To learn more about the U.S. Army Corps of Engineers FUDS Program, please click here.