By Paul H. Meier (Paul) on Monday, January 22, 2007 - 06:05 pm:
The Lake Linden bank was the first to dredged. It is the tailings from the Calumet Conglomerate Lode and those tailings, once reclaimed, produced more copper than most mines did at the time C&H was operating its dredges on it. Tamarack, Osceola, and Ahmeek sands were reclaimed after the Lake Linden bank was finished. The Quincy operation lasted only a little more than 20 years. Starting towards the end of WWII and running into the mid-60's. Up until the introduction of floatation and ammonia leaching, the extraction of copper from the rock was mechanical rather than chemical.
My Grandfather worked in the C&H smelter during the WWI era, pretty much the only stuff going into the smelts was mill concentrate, which was mostly native copper and some rock. They did get "black muck" from White Pine which was owned by C&H at that time. He didn't like working with that stuff. C&H experimented with asbestos coveralls for the smelter workers - that worked fine for keeping molten copper or slag out, but if a piece found its way in - it couldn't be shaken out and worse burns resulted. The coveralls were soon abandoned. My grandfather smoked, worked in smelters, foundries, and welding all his working life - he lived into his 80's. Go figure, that supposedly should have killed him by time he was 40.