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The mine was the first Michigan copper mine to switch from fissure mining to amygdaloid mining, when the recently discovered Pewabic amygdaloid lode was found to cross Quincy property in 1856. [9] High-grade fissure veins contained large, pure masses of copper, but the masses could take days or even months to extract, at high cost.
The mine has a steady decline plunging to 1,774 feet below sea level. The mine is the deepest point in the United States where a car can be driven, down a ramp used by specialist mining vehicles. In 2022, Eagle Mine was used to set a Guinness World Record for the greatest altitude change achieved by an electric vehicle. [1] [2]
Name County Years Material Coordinates Adventure mine: Ontonagon: 1850–1920: copper: Alabastine Mine: Kent: 1907– gypsum: Arcadian mine: Houghton: 1898–1908: copper
The Delaware Mine is located off U.S. Highway 41, 12 miles (19 km) in Grant Township, Keweenaw County, south of Copper Harbor, Michigan and is a Keweenaw Heritage Site. [1] [2] The Delaware Copper Mine provides tours of one of the oldest copper mines in the Keweenaw, [2] dating back to 1847. The mine had five shafts, with the deepest reaching ...
Iron mines of the era exploited the "natural" (soft) iron-rich ores in a 15 kilometer-long stretch in the central portion of the range straddling the Michigan-Wisconsin state line. These mines were mainly of the underground shaft type, which were among the deepest iron mines in the country.
The Michigan Department of Natural Resources decided to renew the lease for the mine before it expired December 27, 2021. Upper Peninsula lawmakers expressed their appreciation for the renewal with the expectation that the project would provide hundreds of good-paying construction, mining and administrative jobs, as well as contributing greatly ...
Copper knife, spearpoints, awls, and spade made from copper deposits mined by Native Americans in Wisconsin from the Late Archaic period, 3000 BC-1000 BC.. Native Americans were the first to mine and work the copper of Lake Superior and the Keweenaw Peninsula of northern Michigan between 5000 BCE and 1200 BCE.
This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.