From airship fuel to a medical supply
The Texas reserve was built to hold helium for military airships, which relied on the gas because it is lighter than air and does not burn. The storage site’s role changed as airships faded from military use and helium became important to other industries. Today, one of its most consequential uses is supplying hospitals with helium for MRI scanners.
A natural underground storage tank
Helium is extracted from certain natural-gas deposits, then stored at the Texas site as a gas in a deep, porous rock formation sealed beneath a layer that keeps it from escaping. The formation acts like a vast underground tank. Storing gas there avoids the need to keep the reserve in a large collection of surface containers and makes it possible to draw helium into pipelines when needed.
This matters because helium is difficult to replace once it escapes into the atmosphere. It is a finite resource on human timescales, and it is generally recovered as a byproduct rather than produced on its own. Underground storage helps preserve a supply that can be used over time instead of requiring every user to rely on helium produced at that moment.
Why MRI scanners need it
An MRI scanner uses powerful magnets to create images inside the body. In many scanners, those magnets must be kept extremely cold to work as superconductors—materials that carry electric current with almost no resistance. Liquid helium provides that cooling. A reserve first designed around military flight now helps support the cooling system behind medical imaging.
