Did they use the big massive dredges there?
I've located a few photos of the last dredge that operated on Klondike and Bonanza Creek. It was a very big one that was too big to work very far up the canyon and on side streams, so smaller ones were used for those places. The early dredges were steam powered, but this last one was electric, though I don't now recall just where they got the electricity from. Probably Hydro-electric, as it was late enough in the era for major dams and transmission lines to have been built!
Here ya go .... Enjoy:
Dredge Tailings some ways up Bonanza Creek
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
Downstream, in the wider Klondike valley, the big dredge still sits with tailings all around it. Currently being restored and is a tourist attraction.
[ Guests cannot view attachments ]
Somewhere I may be able to find more photos, including some interior shots with the massive gears and such showing.
I'll keep looking.