The construction of 4 dams on the lower Snake River in eastern WA sealed the fate of the salmon runs into central Idaho. They were built in the 60's. Between them and dams on the Columbia, it was too much for the fish to overcome.
Lots of folks don't realize there was another dam below Redfish lake (Sunbeam I think) that was considered a possible problem to the sockeye along with the Lower Snake dams. Another thing not frequently mentioned was a program years ago to "treat" the Stanley Basing lakes (poison) with rotenone. And Agricultural water withdrawals.
This was the quickest reference I could locate.
https://books.google.com/books?id=j...0in%20redfish%20lake%20idaho&f=falseThere are more references out there.
I'm not trying to argue with you Rock Chuck. The dams on the snake probably did " seal the fate" of the sockeye as you put it. They seem to have been in seriuos trouble before the Snake River dams went in though. It does seem that recently their fate seems to have changed some, not to a recovery to historical levels, but at least above the functional "zero" spawners they had a few years back.
And RC, many many thanks for the photos of such beautiful country. ANd of the llamas too. Way cool, and it gives me ideas of what I will need to continue backcountry hunts in my "dotage".
Disclaimer: I work for one of the projects on the Snake currently attempting to restore these valuable sockeye (and other salmonid stocks) to the Snake/Clearwater basins. Tonight I'm "babysitting" an adult sockeye that will make a trip to the hatchery with ID F&G tomorrow.
Geno