The Crude Helium Enrichment Unit in the Cliffside Gas Field, Federal Helium Program, outside Amarillo, Texas.
US Bureau of Land Management
<a rel="nofollow" class="external free" href="https://www.blm.gov/wo/st/en/info/history/sidebars/energy/managing_the_blm_s.html">http://www.blm.gov/wo/st/en/info/history/sidebars/energy/managing_the_blm_s.html</a>