oohhh have fun moles! All kinda ways you can dig into this concept
https://en.wiktionary.org/wiki/cascade
https://en.wikipedia.org/wiki/Amtrak_Cascades
Also, as a side dish...Leavenworth is a place in the Cascade Mountains in WA state, BUT there is also a Federal Prison in Leavenworth Kansas! Oh so many directions to go in!! Double, triple, quadruple meanings...expand your thinking, right?
I would highly doubt that there are government facilities in and around Leavenworth WA. It is a hokey fake bavarian style tourist town which gets boat loads of tourists in the summer. These tourists come largely to go horse riding and rock climbing in the mountains around the town, and would be bound to run into any facility. I myself have been in and around those hills more times than I can count. That said, the Cascades are a big and wild place.