Working Missile Silo Facility File

A working missile silo facility is a high-security, subterranean military installation designed for the permanent storage and rapid launch of intercontinental ballistic missiles (ICBMs). These facilities are engineered to withstand extreme conditions, including nuclear blasts, and are kept on constant alert status. Structural Composition

: A massive sliding closure at the surface, often weighing between 110 and 700 tons. In a launch event, this door is opened rapidly, sometimes using explosive charges or compressed gas, to clear the way for the missile. Working Missile Silo Facility

: A vertical cylindrical shaft, typically extending 80 to 100 feet underground. It is constructed of reinforced concrete several feet thick and lined with steel plate to protect the missile from the elements and external shock. A working missile silo facility is a high-security,

Modern silo operations are rarely conducted from within the silo itself. Instead, they are part of a networked system: In a launch event, this door is opened

: A hardened underground capsule, often 60 to 100 feet deep, where a two-person "missileer" crew monitors a group of (usually ten) silos.

: Missileers and facility managers typically work 24-hour alert shifts , performing constant system checks and maintaining communication with command authorities. The Delta-09 Missile Silo - National Park Service