Cover of: Unreclaimed hardrock mines | United States. Congress. House. Committee on Natural Resources. Subcommittee on Energy and Mineral Resources. Read Online
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Unreclaimed hardrock mines joint oversight hearing before the Subcommittee on Energy and Mineral Resources and the Subcommittee on Oversight and Investigations of the Committee on Natural Resources, House of Representatives, One Hundred Third Congress, first session ... hearing held in Washington, DC, August 5, 1993. by United States. Congress. House. Committee on Natural Resources. Subcommittee on Energy and Mineral Resources.

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Published by U.S. G.P.O., For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office in Washington .
Written in English

Subjects:

Places:

  • United States.

Subjects:

  • Mines and mineral resources -- Environmental aspects -- United States.,
  • Strip mining -- Environmental aspects -- United States.,
  • Mineral industries -- Environmental aspects -- United States.,
  • Mining law -- United States.

Book details:

Edition Notes

ContributionsUnited States. Congress. House. Committee on Natural Resources. Subcommittee on Oversight and Investigations.
Classifications
LC ClassificationsKF27 .I519 1993e
The Physical Object
Paginationvi, 264 p. :
Number of Pages264
ID Numbers
Open LibraryOL1160185M
ISBN 100160433371
LC Control Number94138528

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This book is full of details about the mines of the San Juans. Great for research of this area. Read more. One person found this helpful. Helpful. Comment Report abuse. sly out of 5 stars Items arrived quickly and seem to be good quality. Reviewed in the United States on Octo  › Books › Engineering & Transportation › Engineering. Until the s, mine operators could mine for valuable hardrock minerals—i.e., gold or copper—then abandon the land. On lands they oversee, federal agencies identified about , remnants of these hardrock mines, including unsecured tunnels and toxic waste There are hard-rock underground mines, and there are soft-rock underground mines. Coal deposits, for instance, live in relatively soft sedimentary rock. Gold deposits live in igneous or metamorphic rock, which is relatively hard, as do diamonds, copper, silver, nickel and zinc [source: Great Mining ]. Even within the hard-rock category, design  › HowStuffWorks › Science › Engineering › Structural Engineering.   Includes the area over the Hard Rock, MacLeod-Cockshutt and Consolidated Mosher mines, g/t Au cutoff grade, , oz Au: Gold Grams per Tonne: Hardrock In-pit: indicated mineral resource: Lewis et al., Includes the area over the Hard Rock, MacLeod-Cockshutt and Consolidated Mosher mines, g/t Au cutoff grade

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