Construction of New Missile Silos for the Sentinel System Begins in Utah
In March 2026, construction commenced in Utah aimed at replacing the Cold War-era missile silos, as the U.S. military recognized that the new Sentinel missiles were too large for the outdated facilities built during Richard Nixon's presidency.
In a significant move towards modernizing its strategic defense capabilities, the United States has initiated the construction of new missile silos in Utah. This development marks a decisive step in phasing out the concrete legacy of the Cold War. The U.S. military has acknowledged that the latest Sentinel missiles have outgrown the old silos, which were originally excavated decades ago. Rather than patching up the obsolete equipment from the 1970s, Northrop Grumman and Bechtel are collaborating to design a new launch facility from the ground up, promising substantial advancements in American strategic security.
The American security strategy is founded on a principle known as the “triad”: should an adversary attempt to eliminate aircraft or submarines, ground-based missiles will still deliver a retaliatory strike. However, as the fleet and aviation gradually transition to new technologies, the 450 missile installations located across the plains of Montana and Dakota continue to deteriorate due to age and moisture.
The old silos were constructed as monolithic reinforced concrete structures equipped with analog systems, copper wiring, and outdated ventilation. Any repairs under such conditions pose a significant challenge due to limited space, and upgrading electronics often necessitates nearly complete redesigns. This predicament has prompted military officials to embark on a new project that involves the creation of modern silos.
The new Sentinel missile features a three-section design, standing at 18 meters tall, which not only surpasses its predecessor in technological specifications but is also considerably larger. Fitting it into the old “nests” would be exceedingly difficult, leading military planners to decide on a completely new architectural approach. Engineers are employing a modular strategy, where sections of the silo are manufactured at factories and delivered to the site ready for assembly. This method resembles contemporary tunnel construction techniques, where specialized machines can connect blocks in just a matter of days.
Inside the new silos, modularity is maintained in every aspect. Communications now operate through secure fiber optics, and the electronics are based on a digital platform that allows for system upgrades without the need for complete equipment replacement. The entire project exists in a “digital twin” format, enabling specialists to monitor the status of each component from the moment of its manufacturing to its installation underground. Additionally, the working conditions for technicians have been significantly improved: enhanced ergonomics and a modern climate control system aim to address the persistent moisture issues within the silos.
The U.S. Air Force plans to deploy 450 new missile installations in the same areas where the old positions currently exist. The Sentinel missile has already undergone live-fire testing across all stages, with major flight tests scheduled for 2027. If everything proceeds according to plan, the new system is expected to be operational by the early 2030s, marking a crucial step in the modernization of American strategic defense.