Abandoned mines in Pershing County, Nevada
Pershing County, Nevada has 6,611 mine and prospect features on USGS topographic maps published 1939–1990, including 1,839 mine openings (shafts, adits and air shafts) and 4,295 prospect pits; 170 of the features carry a name on the map. MSHA's register carries 104 mines in the county with status Abandoned or Abandoned and Sealed.
Every mine and prospect feature the USGS digitized from historical topographic maps covering Pershing County, every OSMRE abandoned mine land problem in the county, and every MSHA-registered mine here with status Abandoned. Named features are listed below; unnamed ones are counted by type. Locations are deliberately not shown: this page says what abandoned workings are in the county, not where to find them. They are dangerous and should not be entered.
- Mapped mine features (USGS)
- 6,611
- Mine openings
- 1,839
- OSMRE problems unreclaimed
- 0
- MSHA mines marked abandoned
- 104
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1,839 27.8%Mine openingsshafts, adits, air shafts, portals and vertical openings: the ways into underground workings
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4,295 65.0%Prospect pits and trenchesshallow exploration diggings that never became a mine
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185 2.8%Mines and surface workingslabelled mines, open pits, strip mines, placer and hydraulic workings
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199 3.0%Quarries, gravel and borrow pitsconstruction-material and industrial-mineral extraction
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93 1.4%Dumps, tailings, spoil and gobwhat mining left above ground
| Name on map | Feature |
|---|---|
| Adriene Mine | Prospect Pit |
| Arcturus Mine | Adit |
| Arizona Mine | Adit |
| Arizona Mine | Adit |
| Auburn Mine | Adit |
| Auburn Mine | Adit |
| Auld Lang Syne Mine | Mine Shaft |
| Badger Mine | Adit |
| Badger Mine | Adit |
| Black Diablo Mine | Adit |
| Black Diablo Mine | Mine Shaft |
| Black Hole Mine | Adit |
| Black Hole Mine | Mine Shaft |
| Black Warrior Mine | Mine Shaft |
| Blackjack Mine | Prospect Pit |
| Bloody Canyon Mine | Adit |
| Bloody Canyon Mine | Mine Shaft |
| Bluebird Mine | Open Pit Mine |
| Bluebird Mine | Prospect Pit |
| Bonanza King Mine | Mine Shaft |
| Boston Tunnel | Adit |
| Boston Tunnel | Adit |
| Buck and Charley Mine | Adit |
| Buck and Charley Mine | Mine Shaft |
| Camera Mine | Mine Shaft |
| Camera Mine | Mine Shaft |
| Cassidy Mine | Adit |
| Champion Mine | Adit |
| Champion Mine | Open Pit Mine |
| Cinnabar City Mine | Adit |
| Cinnabar City Mine | Adit |
| Colorado Placer Mine | Placer Mine area |
| Coon Can Mines | Open Pit Mine |
| De Soto Mine | Adit |
| DeSoto Mine | Adit |
| Disturbed Earth | Prospect Pit area |
| Disturbed Earth | Prospect Pit area |
| Double O Mine | Open Pit Mine area |
| Double O Mine | Open Pit Mine area |
| Double O Mine | Prospect Pit |
| Eagle Picher Mine | Open Pit Mine |
| Eureka Mine | Adit |
| Evening Star Mine | Mine Shaft |
| Fairview Mine | Mine Shaft |
| Florida Canyon Mine | Adit |
| Fluorspar Mine | Open Pit Mine |
| Forge Mine | Prospect Pit |
| Four Sisters Mine | Mine Shaft |
| Garrett Mine | Adit |
| Haystack Mine | Mine Shaft |
| Hollywood Mine | Adit |
| Hollywood Mine | Adit |
| Humboldt Queen Mine | Mine Shaft |
| Imlay Canyon Mine | Mine Shaft |
| Imlay Mine | Mine Shaft |
| Imlay Mine | Prospect Pit |
| Inskip Mine | Mine Shaft |
| Jersey Mine | Mine Shaft |
| Jersey Mine | Prospect Pit |
| Johnson - Heizer Mine | Mine Shaft |
| Johnson-Heizer Mine | Mine Shaft |
| Keystone Mine | Mine Shaft |
| Keystone Mine | Open Pit Mine |
| Lakeview Mine | Adit |
| Lakeview Mine | Open Pit Mine |
| Last Chance Mine | Adit |
| Licoln Hill Mine | Prospect Pit |
| Limerick Basin Mine | Open Pit Mine |
| Lincoln Hill Mine | Adit |
| Lincoln Hill Mine | Adit |
| Little Juniper Mine | Mine Shaft |
| Little Jupiter Mine | Mine Shaft |
| Little Tungsten Mine | Adit |
| Little Tungsten Mine | Adit |
| Little Tungsten Mine | Mine Shaft |
| Long Mine | Adit |
| Looney Mine | Mine Shaft |
| Looney Mine | Mine Shaft |
| Lucky Boy Mine | Mine Shaft |
| Majuba Hill Mine | Adit |
| Marietta Mine | Open Pit Mine |
| Marigold Mine | Adit |
| Marigold Mine | Prospect Pit |
| Mazuma Mine | Adit |
| Mazuma Mine | Prospect Pit |
| Menroe Mine | Adit |
| MGL Mines | Mine Shaft |
| Midway Group | Mine Shaft |
| Midway Group Mine | Adit |
| Monroe Mine | Mine Shaft |
| Montezuma Mine | Mine Shaft |
| Montezuma Mine | Mine Shaft |
| Moonlight Mine | Mine Shaft |
| Moonlight Mine | Mine Shaft |
| Morning Star Mine | Mine Shaft |
| Mount Tobin Mine | Prospect Pit |
| Mt Tobin Mine | Adit |
| Muttlebury Mine | Adit |
| Nenzel - Crown Point Mine | Mine Shaft |
| Nenzel Crown Point Mines | Adit |
| Nevada Massachusetts Tungsten Mine | Open Pit Mine |
| Nevada Massachusetts-Tungsten Mine | Mine Shaft |
| Nevada Packard Mine | Adit |
| Nevada Packard Mine | Open Pit Mine |
| Nevada Packard Mine | Open Pit Mine area |
| Nevada Quicksilver Mine | Mine Shaft |
| Nevada Quicksilver Mine | Mine Shaft |
| Nevada-Massachusetts Tungsten Mine | Open Pit Mine |
| Nightingale Mine | Mine Shaft |
| Octopus Mine | Adit |
| Oreana Mine | Adit |
| Oro Fino Mine | Adit |
| Pacific Matchless Mine | Adit |
| Pacific Matchless Mine | Adit |
| Pershing Mine | Adit |
| Pershing Quicksilver Mine | Mine Shaft |
| Pershing Quicksilver Mine | Mine Shaft |
| Pflum Mine | Adit |
| Piedmont Mine | Mine Shaft |
| Pinite Mine | Adit |
| Pinite Mine | Open Pit Mine |
| Plainview Group Mine | Adit |
| Plainview Group Mines | Adit |
| Plueger Mine | Adit |
| Portland Mine | Mine Shaft |
| Pronto Plata Mine | Open Pit Mine area |
| Queen of Sheba Mine | Adit |
| Queen of Sheeba Mine | Adit |
| Republican Mine | Adit |
| Rochester Merger Mine | Adit |
| Rochester Merger Mines | Prospect Pit |
| Rochester Mines | Mine Dump area |
| Rochester Mines | Prospect Pit |
| Rosal Mine | Adit |
| Rosal Mine | Prospect Pit |
| Rose Creek Mine | Prospect Pit |
| Rosebud Mine | Mine Shaft |
| Rye Patch Mine | Mine Shaft |
| Ryepatch Mine | Mine Shaft |
| Santa Clara Mine | Adit |
| Silver Reef Mine | Adit |
| Silver Reef Mine | Prospect Pit |
| Silver Star Mine | Adit |
| Silver Star Mine | Prospect Pit |
| Standard Mine | Open Pit Mine area |
| Standard Mine | Open Pit Mine |
| Standard Mine | Open Pit Mine area |
| Star Mine | Adit |
| Star Point Mine | Mine Shaft |
| Star Point Mine | Mine Shaft |
| Starlight Mine | Prospect Pit |
| Steiner Mine | Adit |
| Steiner Mine | Mine Shaft |
| Sutherland Mine | Mine Shaft |
| Tehama Mine | Adit |
| Temple Group Mine | Adit |
| Tip Top Mine | Adit |
| Twin Buttes Mines | Mine Shaft |
| Twin Dome Mine | Mine Shaft |
| Valarie Mine | Open Pit Mine |
| Wadley Mine | Adit |
| Wadley Mine Prospects | Prospect Pit |
| Weaver Canyon Mine | Prospect Pit |
| Wheelbarrow Mine | Prospect Pit |
| Wildcat Mine | Mine Shaft |
| Willard Mine | Mine Shaft |
| Willard Mine | Mine Shaft |
| Willard Mine | Mine Shaft |
| Windy Hill Mine | Adit |
| Yellowstone Mine | Prospect Pit |
A name is the label printed beside the symbol on the map. "First mapped" is the earliest topographic edition that shows the symbol, which bounds the feature's age from above; it is not the date it was worked. Unnamed features (most prospect pits, adits and shafts carry no label) are in the counts above but not this list.
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4 1/4 Cone CrusherAbandoned 1985-04-24Surface metal/non-metal · Gopher Construction Inc · MSHA ID 2601887
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American Antimony CorporationAbandoned 1989-06-06Facility metal/non-metal · American Antimony Corp · MSHA ID 2602013
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Anderson Canyon MineAbandoned 1983-08-29Surface metal/non-metal · Westbar Mining Company Inc · MSHA ID 2601847
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Antelope MineAbandoned 1985-03-21Surface metal/non-metal · International Script Inc · MSHA ID 2601885
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Auburn MineAbandoned 1981-08-26Surface metal/non-metal · Addesha Mining Company · MSHA ID 2601710
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Azzarello's PitAbandoned 2017-11-16Surface metal/non-metal · Azzarello's Ready-Mix-Concrete · MSHA ID 2602710
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BD Portable ScreenAbandoned 2012-12-17Surface metal/non-metal · B - D Construction · MSHA ID 2602677
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Big MikeAbandoned 1978-12-28Facility metal/non-metal · Ranchers Exploration & Development Corp · MSHA ID 2600088
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Big Mike Copper MineAbandoned 2017-01-30Surface metal/non-metal · North Star Mines, LLC · MSHA ID 2602797
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Black CloudAbandoned 1982-02-22Surface metal/non-metal · Black Cloud Ltd · MSHA ID 2601645
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Black Mountain Screening PlantAbandoned 2014-04-08Surface metal/non-metal · Black Mountain Industrial Minerals LLC · MSHA ID 2602636
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BRITTNEY PLACERAbandoned 1999-05-12Surface metal/non-metal · Mineral Recovery Llc · MSHA ID 2602328
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Buckeye MillAbandoned 1980-08-19Facility metal/non-metal · Buckeye Mining Enterprises Inc · MSHA ID 2601549
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City Of Ely PitAbandoned 1979-09-14Surface metal/non-metal · City Of Ely · MSHA ID 2600950
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Clad PitAbandoned 1980-03-13Surface metal/non-metal · Robert L Helms Construction & Development Co · MSHA ID 2601583
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Coeur Rochester - LovelockAbandoned 2014-03-18Surface metal/non-metal · JCR Development, LLC · MSHA ID 2602738
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Cooney Iron MineAbandoned 1983-06-20Surface metal/non-metal · Cooney Mining · MSHA ID 2600146
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Cooney MinesAbandoned 1989-02-21Surface metal/non-metal · Cooney Mining · MSHA ID 2600715
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Coronado MillAbandoned 1982-07-12Facility metal/non-metal · Coronado Minerals Company · MSHA ID 2600545
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Coyote MineAbandoned 2003-06-24Surface metal/non-metal · Rock Solid Inc. · MSHA ID 2602509
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Danner MineAbandoned 1995-04-14Surface metal/non-metal · Sky Scientific Mining & Processing Inc · MSHA ID 2602263
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Danner Mine And MillAbandoned 1982-01-14Surface metal/non-metal · Danner Mines Inc · MSHA ID 2600623
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De Braga Pit #1Abandoned 2009-07-20Surface metal/non-metal · Dennis De Braga · MSHA ID 2601959
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Domtar MineAbandoned 1984-06-01Surface metal/non-metal · Northbilt Inc · MSHA ID 2601883
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Dry Gulch-Spring Valley PlacerAbandoned 1982-08-23Surface metal/non-metal · Dow James Minerals Inc · MSHA ID 2601654
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Dun Glen MineAbandoned 2005-07-12Surface metal/non-metal · Vector Mining Inc. · MSHA ID 2602527
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Dun Glen PlacerAbandoned 1993-07-29Surface metal/non-metal · Sky Scientific Mining & Processing Inc · MSHA ID 2601821
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Dun Glen Placer MineAbandoned 2016-12-14Surface metal/non-metal · Dun Glen Mining, Corp. · MSHA ID 2602750
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FencemakerAbandoned 2016-01-15Underground metal/non-metal · Stockpile Reserves LLC · MSHA ID 2601650
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Florida CanyonAbandoned 1996-08-15Surface metal/non-metal · N A Degerstrom Inc · MSHA ID 2602207
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Florida Canyon Mine And MillAbandoned 1982-03-01Surface metal/non-metal · Flying J Mines · MSHA ID 2601543
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Global MineAbandoned 1987-05-29Surface metal/non-metal · Global Natural Resources Inc · MSHA ID 2601808
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Gold Ribbon MineAbandoned 2023-10-03Underground metal/non-metal · Taghman Acquisitions LLC · MSHA ID 2602815
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Golden Predator US Inc-Springer Mng CoAbandoned 2009-07-09Surface metal/non-metal · Springer Mining Company · MSHA ID 2602659
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Gypsum MountainAbandoned 2015-04-30Surface metal/non-metal · Silver State Minerals LLC · MSHA ID 2602758
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Hardluck MineAbandoned 1982-08-25Surface metal/non-metal · H & M Minerals · MSHA ID 2601791
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Imlay MineAbandoned 1994-08-17Surface metal/non-metal · Imperial Milling Inc · MSHA ID 2601594
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KRDAbandoned 2017-01-05Surface metal/non-metal · Kelzyme Mineral Development, LLC · MSHA ID 2602752
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Kublai KhanAbandoned 2004-06-01Underground metal/non-metal · Nevada Iron · MSHA ID 2602539
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Lane & Phillips Mine #1Abandoned 1988-11-15Surface metal/non-metal · Lane & Phillips Mines · MSHA ID 2602080
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Little Jupiter Mine Or Little Jupiter MiAbandoned 1986-08-01Underground metal/non-metal · Circle A Construction Inc · MSHA ID 2601260
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Long LeaseAbandoned 1980-06-17Underground metal/non-metal · Aaron Mining Inc · MSHA ID 2601520
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Long Tom MineAbandoned 2012-07-25Surface metal/non-metal · Cascade Gold, LLC · MSHA ID 2602696
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Lovelock Perlite MillAbandoned 1982-08-23Facility metal/non-metal · United States Gypsum Company · MSHA ID 2600850
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Lower Valley QuarryAbandoned 2016-07-11Surface metal/non-metal · Road and Highway Builders LLC. · MSHA ID 2602769
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Lunker MineAbandoned 2016-06-30Surface metal/non-metal · Lunker Mine LLC · MSHA ID 2602784
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M G L MineAbandoned 1982-08-25Surface metal/non-metal · Comstock Inc · MSHA ID 2601793
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Nassau MineAbandoned 1986-06-16Surface metal/non-metal · American Colloid Company · MSHA ID 2601891
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NDOT 3651 AGAbandoned 2018-03-27Surface metal/non-metal · Q&D Construction · MSHA ID 2602807
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Nevada Packard MineAbandoned 1984-06-05Facility metal/non-metal · Nevada Packard Joint Venture · MSHA ID 2601586
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Nick MineAbandoned 2015-08-18Surface metal/non-metal · Valley Excavating LLC · MSHA ID 2602687
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Nightmare MineAbandoned 1981-08-26Surface metal/non-metal · Robert R Chittenden Lessee · MSHA ID 2601556
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North StarAbandoned 2019-04-11Surface metal/non-metal · Oreana Energy LLC · MSHA ID 2602805
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Octopus MinesAbandoned 1980-08-19Surface metal/non-metal · Buckeye Mining Enterprises Inc · MSHA ID 2601550
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One More MineAbandoned 1982-08-30Surface metal/non-metal · Russ Coulter-Irv Green Partners · MSHA ID 2601802
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OREANA MILLAbandoned 2000-01-03Facility metal/non-metal · Magma Minerals Inc · MSHA ID 2602334
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Parker Brothers MineAbandoned 2015-12-16Surface metal/non-metal · Zephyr Minerals, Inc. · MSHA ID 2602757
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Pay DirtAbandoned 1982-01-14Surface metal/non-metal · Basil Cramer · MSHA ID 2601714
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Pershing PitAbandoned 2019-10-10Surface metal/non-metal · Pershing Sand and Gravel · MSHA ID 2602837
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Portable Crusher #1008Abandoned 2007-09-17Surface metal/non-metal · Frehner Construction Company Inc · MSHA ID 2602345
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Portable Crusher #2Abandoned 2014-04-08Surface metal/non-metal · Titan Constructors, Inc. · MSHA ID 2602740
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Portable Crusher 1004Abandoned 2014-04-21Surface metal/non-metal · Road and Highway Builders, LLC · MSHA ID 2602000
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Portable Crusher-LovelockAbandoned 1992-03-16Surface metal/non-metal · Robert L Helms Construction · MSHA ID 2602175
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Portable Rock Plant #1Abandoned 2009-09-29Surface metal/non-metal · Sierra Nevada Construction Inc. · MSHA ID 2602649
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Princeton MineAbandoned 1985-04-24Surface metal/non-metal · Princeton Mining Association Inc · MSHA ID 2601861
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Project LlamaAbandoned 2007-08-23Surface metal/non-metal · Eco Sol, LLC. · MSHA ID 2602576
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Red Gulch MineAbandoned 1990-04-05Surface metal/non-metal · Edgemont Minerals Corp · MSHA ID 2602141
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Redhill MineAbandoned 1982-08-03Surface metal/non-metal · Redhill Mines Inc · MSHA ID 2601799
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RELIEF CANYONAbandoned 1999-05-12Surface metal/non-metal · New Gold Inc · MSHA ID 2601857
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Rose-DaleAbandoned 1985-06-12Surface metal/non-metal · Minerals Associates Inc · MSHA ID 2601838
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S P Gravel PitAbandoned 1989-02-15Surface metal/non-metal · Western Central Concrete Inc · MSHA ID 2602039
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Sandra LeeAbandoned 1982-12-03Surface metal/non-metal · Michael Benickie · MSHA ID 2601806
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Sexton MineAbandoned 2025-01-01Surface metal/non-metal · Nutritional Additives · MSHA ID 2600734
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Sexton MineAbandoned 1994-10-05Surface metal/non-metal · Sexton Mine · MSHA ID 2600868
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Silver KingAbandoned 1981-07-07Underground metal/non-metal · Argentum Mining Corp · MSHA ID 2601687
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SLIM MINEAbandoned 2002-09-23Surface metal/non-metal · Vanderbilt Minerals Corp · MSHA ID 2600050
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Spaulding Canyon PlacerAbandoned 1986-04-07Surface metal/non-metal · Westar Corp · MSHA ID 2601836
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Springer MineAbandoned 1980-01-25Underground metal/non-metal · Centennial Development Company · MSHA ID 2601567
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Springer MineAbandoned 1985-07-25Surface metal/non-metal · J M & Company · MSHA ID 2601926
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Standard MineAbandoned 2006-04-05Surface metal/non-metal · Standard Gold Mining Inc · MSHA ID 2602536
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Star Creek MineAbandoned 1981-08-13Surface metal/non-metal · Phillip Geertson · MSHA ID 2601622
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SULPHER SPRINGS PROJECTAbandoned 2002-09-23Surface metal/non-metal · Black Gold Mining · MSHA ID 2602447
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SUNRISE GOLD PLACER MINEAbandoned 2019-10-10Surface metal/non-metal · Sunrise Minerals · MSHA ID 2602635
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Superior MineAbandoned 1978-08-22Underground metal/non-metal · Superior Mines Inc · MSHA ID 2601460
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Superior MineAbandoned 1982-08-25Surface metal/non-metal · Banner Resources Corp · MSHA ID 2601794
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Tag MineAbandoned 1979-09-20Underground metal/non-metal · F M Wright Mining Company · MSHA ID 2601373
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Toulon MillAbandoned 1980-06-17Facility metal/non-metal · Aaron Mining Inc · MSHA ID 2600610
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TRINITY MINEAbandoned 1997-04-28Surface metal/non-metal · Remtech L L C · MSHA ID 2602031
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Tungsten MillAbandoned 1979-12-28Facility metal/non-metal · Tungsten Properties Ltd · MSHA ID 2601267
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Velvet MineAbandoned 1982-07-06Facility metal/non-metal · B & H Mining · MSHA ID 2601681
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Waddy MineAbandoned 1981-08-25Surface metal/non-metal · United Mining Company · MSHA ID 2601729
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Washaki ClaimsAbandoned 1979-01-30Surface metal/non-metal · Carl E Thomsen Owner · MSHA ID 2601391
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Wheeler Rental C3054 Jaw CrusherAbandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602854
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Wheeler Rental MASABA 36Abandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602851
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Wheeler Rental MASABA 36Abandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602852
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Wheeler Rental MASABA 7x20 Screen PlantAbandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602850
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Wheeler Rental MASABA 8x20 Screen PlantAbandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602853
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Wheeler Rental METSO HP400 ConeAbandoned 2020-09-14Surface metal/non-metal · CONAM Construction · MSHA ID 2602849
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Willard MineAbandoned 1995-01-09Surface metal/non-metal · Western States Minerals Corp · MSHA ID 2602095
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WILLOW CREEKAbandoned 1998-01-27Surface metal/non-metal · Mingus La Marr Mining Corp · MSHA ID 2601546
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Willow Creek OperationAbandoned 1985-04-24Surface metal/non-metal · Ken Mc Griffin · MSHA ID 2601721
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Willow Creek Placer- Thacker PAbandoned 2006-02-22Surface metal/non-metal · Western Placer Resources · MSHA ID 2602492
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Willow Creek ProjectAbandoned 1986-07-21Surface metal/non-metal · Mining Research Inc · MSHA ID 2601912
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Wright MillAbandoned 1980-06-18Facility metal/non-metal · F M Wright Mining Company · MSHA ID 2601482
Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.
| Feature type | Features |
|---|---|
| Prospect Pit | 4,293 |
| Adit | 1,201 |
| Mine Shaft | 638 |
| Open Pit Mine | 102 |
| Tailings - Undifferentiated | 79 |
| Open Pit Mine | 71 |
| Gravel Pit | 65 |
| Gravel Pit | 59 |
| Borrow Pit | 46 |
| Borrow Pit | 19 |
| Mine Dump | 13 |
| Open Pit Mine or Quarry | 11 |
| Quarry | 5 |
| Gravel/Borrow Pit - Undifferentiated | 3 |
| Prospect Pit | 2 |
| Quarry | 1 |
| Placer Mine | 1 |
| Sand Pit | 1 |
| Tailings - Undifferentiated | 1 |
A USGS feature is a symbol on a historical topographic map, there when the map was surveyed; it may since have been sealed, reclaimed, built over or reopened as a working mine, and the map does not say which. An OSMRE row is a problem the abandoned mine land program tracks, not a mine. An MSHA mine is a registered operation whose operator reported abandonment, a record that starts in the 1970s. The three overlap and are never added together. The county is assigned from each feature's coordinates against the Census 2023 county boundaries. The full method is on the national page.
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USGS, Consolidated Prospect- and Mine-Related Features from 7.5- and 15-Minute Topographic Quadrangle Maps of the United States (USMIN)
597,612 point and area features digitized from about 106,350 historical topographic maps published 1886–2006; public domain (CC0). A feature is a map symbol, not a field-verified site, and the map does not say whether it was still worked.
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USGS Fact Sheet 2025–3003, The Abandoned Mine Inventory of the United States
States that as of 2025 there is no comprehensive national inventory of abandoned mine features, and that the detailed national database now being built will not be published.
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OSMRE, Abandoned Mine Land Inventory System (e-AMLIS), public Problems layer
One row per abandoned mine land problem in a problem area, with its type, funding program and reclamation status; mostly coal mined before the 1977 Surface Mining Control and Reclamation Act. Coordinates are the problem area's.
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MSHA, Mines dataset (Mine Data Retrieval System)
Every mine registered with MSHA since the 1970s; a mine reads Abandoned or Abandoned and Sealed when its operator reported that status. Refreshed weekly.
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US Census Bureau, 2023 cartographic county boundaries (1:500,000)
Each feature's county is assigned by its coordinates against these boundaries, not copied from the source file.
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GAO-20-238, Abandoned Hardrock Mines (March 2020)
Federal agencies had identified at least 140,000 abandoned hardrock mine features on federal land and estimated more than 390,000 more not yet captured in their databases.
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Abandoned Hardrock Mine Reclamation (AHMR) Program, US Department of the Interior
The program the USGS inventory is compiled for. Its appropriations and the 674,000 field-confirmed feature count on this page were provided by the program manager, Office of Environmental Policy and Compliance, and are cited with permission (2026-09-08).
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IMCC-NAAMLP Hardrock AML Report
Page 48 carries the two figures this page leans on: USGS estimates 633,181 of the 725,690 mine features it recorded from historic topographic maps, 87 percent, are hardrock; and state and federal agencies have submitted more than 724,000 AML features to the national database being built, already more than the historic maps hold. Year-by-year AHMR funding is on page 35.