Quincy Dredge Number Two

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Calumet and Hecla/Quincy Reclaiming Sand Dredge
Calumet and Hecla Dredge.jpg
Location M-26 near Torch Lake, Osceola Township
Coordinates 47°8′39″N88°27′35″W / 47.14417°N 88.45972°W / 47.14417; -88.45972 Coordinates: 47°8′39″N88°27′35″W / 47.14417°N 88.45972°W / 47.14417; -88.45972
Built1914
Governing bodyState
DesignatedJuly 26, 1978 [1]
USA Michigan location map.svg
Red pog.svg
Location of Calumet and Hecla/Quincy Reclaiming Sand Dredge in Michigan

The Quincy Dredge Number Two (previously known as the Calumet and Hecla Dredge Number One) is a dredge currently sunk in shallow water in Torch Lake, across M-26 from the Quincy Mining Company Stamp Mills Historic District and just east of Mason in Osceola Township. [2] It was constructed to reclaim stamping sand from the lake for further processing, and was designated a Michigan State Historic Site in 1978. [1]

Contents

History

Bow of C&H Dredge #1 during construction BowQuincyDredge.jpg
Bow of C&H Dredge #1 during construction
Dredge c. 1915, soon after construction QuincySandDredgec1915.jpg
Dredge c. 1915, soon after construction
Dredge in 1978 QuincyDredge1978.jpg
Dredge in 1978

The Reclaiming Sand Dredge was constructed for the Calumet and Hecla Mining Company in 1914 by the Bucyrus Company of South Milwaukee, Wisconsin, [3] and designated the Calumet and Hecla Dredge Number One. [1] The dredge was used to reclaim previously-milled sand deposited in the lake after it had gone through the stamp mill. [4] The dredged sand contained copper that earlier stamping technology had not been able to separate out. [4] Improvements in stamping efficiency and cost increases in traditional shaft mining made these sand tailings economically feasible to reclaim and re-stamp. [4]

Calumet and Hecla used the dredge at their Lake Linden Reclamation Plant until 1951. [2] In 1951, the Quincy Mine purchased the dredge and designated it as their Quincy Dredge Number Two, using it at their own reclamation facility, [2] [4] which had been in operation since 1943. [5] The mine's Quincy Dredge Number One sank in 1956, and Dredge Number Two was used until 1967, [2] when it too sank during a winter lay-up. [4] By this time, copper prices had fallen low enough that the reclamation process was not profitable, and the Quincy Mine abandoned both the dredge and its reclamation facility. [4]

Description

The dredge is a large, box-like vessel that was used to remove sand from the bottom of the lake. [2] The vessel has a steel hull measuring 110 feet (34 m) long, 56 feet (17 m) wide, and nine feet (2.7 m) deep. [3] The decking overhangs the hull by eight feet (2.4 m) per side, giving an overall width of 72 feet (22 m). [3] The dredge could process over 10,000 short tons (9,100 t) of sand per day, and had a 141-foot (43 m) suction pipe that could work in 115 feet (35 m) of water. [2]

The dredge is currently sunk in shallow water, and canted over to one side. [4] Most of the superstructure and the large boom are visible above the waterline. [4]

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References

  1. 1 2 3 "Calumet and Hecla/Quincy Reclaiming Sand Dredge". Historic Sites Online. Michigan State Housing Development Authority. Archived from the original on May 24, 2012. Retrieved November 20, 2010.
  2. 1 2 3 4 5 6 Molloy, Lawrence J. (2001). "A Guide to Michigan's Historic Keweenaw Copper District" . Retrieved November 25, 2010.
  3. 1 2 3 Ives, L. E. (November 17, 1914). "The Calumet & Hecla Dredge". Engineering and Mining Journal. 98 (19): 811–3.
  4. 1 2 3 4 5 6 7 8 "Quincy Dredge". Keweenaw Free Guide. Retrieved November 26, 2010.
  5. Hyde, Charles K. (c. 1968). "An Economic and Business History of the Quincy Mining Company". Quincy Mining Company, Hancock, Houghton, MI, HAER MI-2. Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey. p. 264.