Rare repair job finished on U.S. nuclear missile system

Air Force maintenance crews completed a first-of-its-kind overhaul of a Minuteman III missile suspension system on August 18, removing the component from a launch facility near Minot Air Force Base, North Dakota, shipping it to California for a full refurbishment, and reinstalling it back at the same site.

The work was carried out by the 583rd Missile Maintenance Squadron, a unit better known by its historical name, Rivet MILE, short for Minuteman Integrated Life Extension. The squadron handles depot-level maintenance across the Air Force’s fleet of Minuteman III intercontinental ballistic missiles, the land-based leg of the U.S. nuclear triad.

“The suspension system that was removed from one of the launch facilities earlier this year was the first operation site at Minot AFB to be removed, transported to Vandenberg Space Force Base, California, refurbished and returned to be reinstalled,” said Roy Ring, 583rd Missile Maintenance Squadron production superintendent.

Inside a Minuteman III launch facility, the suspension system helps hold and protect the missile within its silo. Routine upkeep on the system is normally handled on-site through preventative maintenance rather than by removing and rebuilding the entire assembly. A complete overhaul, like the one just finished, happens rarely across the Minuteman III fleet.

“The complete overhaul of a suspension system does not happen often across the Minuteman III fleet,” Ring said. “Since the creation of the Depot Maintenance Teams in the mid-1980s, known as Rivet Mile and now the 583rd Missile Maintenance Squadron, mechanics have been routinely inspecting and repairing the suspension systems.”

The squadron is the only one in the Department of War authorized to perform this level of maintenance on Minuteman III facilities, both underground and above ground, according to KyAnn Betz, the squadron’s director.

“We have a full maintenance shop at each missile wing for local manufacturing and repair,” Betz said. “We also assist with field-level maintenance if needed.”

Unlike most Air Force squadrons, the 583rd has no active-duty service members. It is staffed entirely by civilian employees, with more than 250 combined years of Minuteman III experience at each base where it operates. The squadron employs 196 people across five separate units at Minot Air Force Base, Malmstrom Air Force Base in Montana, F.E. Warren Air Force Base in Wyoming, Vandenberg Space Force Base in California, and Hill Air Force Base in Utah.

The Air Force has operated the Minuteman III since 1971, and roughly 400 of the missiles remain deployed at bases in North Dakota, Montana and Wyoming. The squadron’s approach traces back to a Minuteman maintenance and service-life program the Air Force launched in 1985, which formed the basis for what eventually became the 583rd.

By completing the full removal, refurbishment and reinstallation cycle at an operational site, the squadron demonstrated that major structural components of the missile system can be taken off-site for a complete rebuild rather than repaired in place. The Air Force has not said whether it plans to repeat this approach at other launch facilities or how often future full suspension system overhauls might occur.