Underground Bases
Gila Mountain Area
Deep Underground Military base (DUM) located south of I-8, approximately 30 miles east of Yuma at 29°0' N 116°0' W
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The Gila Mountain Area hosts a Deep Underground Military (DUM) base situated in the remote desert terrain east of Yuma. This facility operates in conjunction with other Arizona underground installations along the Interstate 8 corridor. The isolated location provides ideal cover for classified military operations.