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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 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.
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.
This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera 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.
Copper mines in Michigan (16 P) Pages in category "Mines in Michigan" The following 12 pages are in this category, out of 12 total.
The Detroit salt mine is a salt mine located 1,100 ft (340 m) below Detroit, Michigan. [1] The mine opened in 1910 and covers 1,500 acres (610 ha) underground. [2] In the beginning, the leather and food industries were the primary customers. Today, road deicing salt is the primary product. [3]
In the pit was growing a hemlock nearly 400 years old by the number of growth rings. Mining began in 1848, and from 1855 through 1862, the Minesota was the most productive copper mine in the United States. [1] The mine had ten shafts, the deepest of which extended to a depth of 1200 feet (366 m).