I think it was, yeah. I was only 3 when it was made, so I saw it many years later, almost certainly on VHS. I wouldn’t be surprised if a lot of people saw it and had no idea it was made-for-tv.
That’s funny, I just read an essay today about that movie (it’s in an anthology of horror film essays that my husband just put out.) I thought it was funny that I’d never heard of it.
Yup, that’s the one. It’s actually a decent quality early-80s slasher movie with an entertaining plot (monsters get released through underground tunnels when they re-open an abandoned silver mine in Utah!) and good actors. The opening credits are in the style of a Ken Burns documentary, except that this movie came first.