Jim,
Also in my youth ('66-'67) I spent a few deep winter months on the Glen Hwy at Mendeltna Creek (now just the fly speck known as "Mendeltna" but still at mile 153), where the actual air temperature really did get colder than cold for one week. At night one evening the real temp got down to -81 F. which was really something to be out, cautiously, doing things in. Of course, at 20 years old Ph'ffftt - what did it matter to the invincible?
This past summer in the drought it got up to 95 F. for about 2 or 3 weeks and that continual dry heat was rather unbearable to the folks who had acclimated themselves to cooler temperatures. A handful of years ago it got up to about 100 F. one summer - but then two years later the temp hit a summer high of 40 F. in the rain every day --- and so I just explain to folks in the lower 48 who ask that "Every year is completely different than any other".
Now, fgw - For a variety of personal reasons and choices I leave every bit of that drift mining 'stuff' all to you ----- and wish you the very best of fortune with it.
Just remember -- "Safety Third!"
What? You never heard that before? Here, try clicking on this and you'll be the wisest one around:
https://martechnical.com/safety-3rd/
C'mon Spring!!!
Joe