Mining Incidents
Abandoned mine inventory

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
170 features carry a name4,295 prospect pits111 quadrangle maps, published 1939–1990 0 MSHA mines abandoned and sealed
What the features are
  1. Mine openings
    shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
    1,839 27.8%
  2. Prospect pits and trenches
    shallow exploration diggings that never became a mine
    4,295 65.0%
  3. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    185 2.8%
  4. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    199 3.0%
  5. Dumps, tailings, spoil and gob
    what mining left above ground
    93 1.4%
Named features on the maps170 named · from the USGS compilation
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.

MSHA-registered mines with status Abandoned104 on register
  1. 4 1/4 Cone Crusher
    Surface metal/non-metal · Gopher Construction Inc · MSHA ID 2601887
    Abandoned
  2. American Antimony Corporation
    Facility metal/non-metal · American Antimony Corp · MSHA ID 2602013
    Abandoned
  3. Anderson Canyon Mine
    Surface metal/non-metal · Westbar Mining Company Inc · MSHA ID 2601847
    Abandoned
  4. Antelope Mine
    Surface metal/non-metal · International Script Inc · MSHA ID 2601885
    Abandoned
  5. Auburn Mine
    Surface metal/non-metal · Addesha Mining Company · MSHA ID 2601710
    Abandoned
  6. Azzarello's Pit
    Surface metal/non-metal · Azzarello's Ready-Mix-Concrete · MSHA ID 2602710
    Abandoned
  7. BD Portable Screen
    Surface metal/non-metal · B - D Construction · MSHA ID 2602677
    Abandoned
  8. Big Mike
    Facility metal/non-metal · Ranchers Exploration & Development Corp · MSHA ID 2600088
    Abandoned
  9. Big Mike Copper Mine
    Surface metal/non-metal · North Star Mines, LLC · MSHA ID 2602797
    Abandoned
  10. Black Cloud
    Surface metal/non-metal · Black Cloud Ltd · MSHA ID 2601645
    Abandoned
  11. Black Mountain Screening Plant
    Surface metal/non-metal · Black Mountain Industrial Minerals LLC · MSHA ID 2602636
    Abandoned
  12. BRITTNEY PLACER
    Surface metal/non-metal · Mineral Recovery Llc · MSHA ID 2602328
    Abandoned
  13. Buckeye Mill
    Facility metal/non-metal · Buckeye Mining Enterprises Inc · MSHA ID 2601549
    Abandoned
  14. City Of Ely Pit
    Surface metal/non-metal · City Of Ely · MSHA ID 2600950
    Abandoned
  15. Clad Pit
    Surface metal/non-metal · Robert L Helms Construction & Development Co · MSHA ID 2601583
    Abandoned
  16. Coeur Rochester - Lovelock
    Surface metal/non-metal · JCR Development, LLC · MSHA ID 2602738
    Abandoned
  17. Cooney Iron Mine
    Surface metal/non-metal · Cooney Mining · MSHA ID 2600146
    Abandoned
  18. Cooney Mines
    Surface metal/non-metal · Cooney Mining · MSHA ID 2600715
    Abandoned
  19. Coronado Mill
    Facility metal/non-metal · Coronado Minerals Company · MSHA ID 2600545
    Abandoned
  20. Coyote Mine
    Surface metal/non-metal · Rock Solid Inc. · MSHA ID 2602509
    Abandoned
  21. Danner Mine
    Surface metal/non-metal · Sky Scientific Mining & Processing Inc · MSHA ID 2602263
    Abandoned
  22. Danner Mine And Mill
    Surface metal/non-metal · Danner Mines Inc · MSHA ID 2600623
    Abandoned
  23. De Braga Pit #1
    Surface metal/non-metal · Dennis De Braga · MSHA ID 2601959
    Abandoned
  24. Domtar Mine
    Surface metal/non-metal · Northbilt Inc · MSHA ID 2601883
    Abandoned
  25. Dry Gulch-Spring Valley Placer
    Surface metal/non-metal · Dow James Minerals Inc · MSHA ID 2601654
    Abandoned
  26. Dun Glen Mine
    Surface metal/non-metal · Vector Mining Inc. · MSHA ID 2602527
    Abandoned
  27. Dun Glen Placer
    Surface metal/non-metal · Sky Scientific Mining & Processing Inc · MSHA ID 2601821
    Abandoned
  28. Dun Glen Placer Mine
    Surface metal/non-metal · Dun Glen Mining, Corp. · MSHA ID 2602750
    Abandoned
  29. Fencemaker
    Underground metal/non-metal · Stockpile Reserves LLC · MSHA ID 2601650
    Abandoned
  30. Florida Canyon
    Surface metal/non-metal · N A Degerstrom Inc · MSHA ID 2602207
    Abandoned
  31. Florida Canyon Mine And Mill
    Surface metal/non-metal · Flying J Mines · MSHA ID 2601543
    Abandoned
  32. Global Mine
    Surface metal/non-metal · Global Natural Resources Inc · MSHA ID 2601808
    Abandoned
  33. Gold Ribbon Mine
    Underground metal/non-metal · Taghman Acquisitions LLC · MSHA ID 2602815
    Abandoned
  34. Golden Predator US Inc-Springer Mng Co
    Surface metal/non-metal · Springer Mining Company · MSHA ID 2602659
    Abandoned
  35. Gypsum Mountain
    Surface metal/non-metal · Silver State Minerals LLC · MSHA ID 2602758
    Abandoned
  36. Hardluck Mine
    Surface metal/non-metal · H & M Minerals · MSHA ID 2601791
    Abandoned
  37. Imlay Mine
    Surface metal/non-metal · Imperial Milling Inc · MSHA ID 2601594
    Abandoned
  38. KRD
    Surface metal/non-metal · Kelzyme Mineral Development, LLC · MSHA ID 2602752
    Abandoned
  39. Kublai Khan
    Underground metal/non-metal · Nevada Iron · MSHA ID 2602539
    Abandoned
  40. Lane & Phillips Mine #1
    Surface metal/non-metal · Lane & Phillips Mines · MSHA ID 2602080
    Abandoned
  41. Little Jupiter Mine Or Little Jupiter Mi
    Underground metal/non-metal · Circle A Construction Inc · MSHA ID 2601260
    Abandoned
  42. Long Lease
    Underground metal/non-metal · Aaron Mining Inc · MSHA ID 2601520
    Abandoned
  43. Long Tom Mine
    Surface metal/non-metal · Cascade Gold, LLC · MSHA ID 2602696
    Abandoned
  44. Lovelock Perlite Mill
    Facility metal/non-metal · United States Gypsum Company · MSHA ID 2600850
    Abandoned
  45. Lower Valley Quarry
    Surface metal/non-metal · Road and Highway Builders LLC. · MSHA ID 2602769
    Abandoned
  46. Lunker Mine
    Surface metal/non-metal · Lunker Mine LLC · MSHA ID 2602784
    Abandoned
  47. M G L Mine
    Surface metal/non-metal · Comstock Inc · MSHA ID 2601793
    Abandoned
  48. Nassau Mine
    Surface metal/non-metal · American Colloid Company · MSHA ID 2601891
    Abandoned
  49. NDOT 3651 AG
    Surface metal/non-metal · Q&D Construction · MSHA ID 2602807
    Abandoned
  50. Nevada Packard Mine
    Facility metal/non-metal · Nevada Packard Joint Venture · MSHA ID 2601586
    Abandoned
  51. Nick Mine
    Surface metal/non-metal · Valley Excavating LLC · MSHA ID 2602687
    Abandoned
  52. Nightmare Mine
    Surface metal/non-metal · Robert R Chittenden Lessee · MSHA ID 2601556
    Abandoned
  53. North Star
    Surface metal/non-metal · Oreana Energy LLC · MSHA ID 2602805
    Abandoned
  54. Octopus Mines
    Surface metal/non-metal · Buckeye Mining Enterprises Inc · MSHA ID 2601550
    Abandoned
  55. One More Mine
    Surface metal/non-metal · Russ Coulter-Irv Green Partners · MSHA ID 2601802
    Abandoned
  56. OREANA MILL
    Facility metal/non-metal · Magma Minerals Inc · MSHA ID 2602334
    Abandoned
  57. Parker Brothers Mine
    Surface metal/non-metal · Zephyr Minerals, Inc. · MSHA ID 2602757
    Abandoned
  58. Pay Dirt
    Surface metal/non-metal · Basil Cramer · MSHA ID 2601714
    Abandoned
  59. Pershing Pit
    Surface metal/non-metal · Pershing Sand and Gravel · MSHA ID 2602837
    Abandoned
  60. Portable Crusher #1008
    Surface metal/non-metal · Frehner Construction Company Inc · MSHA ID 2602345
    Abandoned
  61. Portable Crusher #2
    Surface metal/non-metal · Titan Constructors, Inc. · MSHA ID 2602740
    Abandoned
  62. Portable Crusher 1004
    Surface metal/non-metal · Road and Highway Builders, LLC · MSHA ID 2602000
    Abandoned
  63. Portable Crusher-Lovelock
    Surface metal/non-metal · Robert L Helms Construction · MSHA ID 2602175
    Abandoned
  64. Portable Rock Plant #1
    Surface metal/non-metal · Sierra Nevada Construction Inc. · MSHA ID 2602649
    Abandoned
  65. Princeton Mine
    Surface metal/non-metal · Princeton Mining Association Inc · MSHA ID 2601861
    Abandoned
  66. Project Llama
    Surface metal/non-metal · Eco Sol, LLC. · MSHA ID 2602576
    Abandoned
  67. Red Gulch Mine
    Surface metal/non-metal · Edgemont Minerals Corp · MSHA ID 2602141
    Abandoned
  68. Redhill Mine
    Surface metal/non-metal · Redhill Mines Inc · MSHA ID 2601799
    Abandoned
  69. RELIEF CANYON
    Surface metal/non-metal · New Gold Inc · MSHA ID 2601857
    Abandoned
  70. Rose-Dale
    Surface metal/non-metal · Minerals Associates Inc · MSHA ID 2601838
    Abandoned
  71. S P Gravel Pit
    Surface metal/non-metal · Western Central Concrete Inc · MSHA ID 2602039
    Abandoned
  72. Sandra Lee
    Surface metal/non-metal · Michael Benickie · MSHA ID 2601806
    Abandoned
  73. Sexton Mine
    Surface metal/non-metal · Nutritional Additives · MSHA ID 2600734
    Abandoned
  74. Sexton Mine
    Surface metal/non-metal · Sexton Mine · MSHA ID 2600868
    Abandoned
  75. Silver King
    Underground metal/non-metal · Argentum Mining Corp · MSHA ID 2601687
    Abandoned
  76. SLIM MINE
    Surface metal/non-metal · Vanderbilt Minerals Corp · MSHA ID 2600050
    Abandoned
  77. Spaulding Canyon Placer
    Surface metal/non-metal · Westar Corp · MSHA ID 2601836
    Abandoned
  78. Springer Mine
    Underground metal/non-metal · Centennial Development Company · MSHA ID 2601567
    Abandoned
  79. Springer Mine
    Surface metal/non-metal · J M & Company · MSHA ID 2601926
    Abandoned
  80. Standard Mine
    Surface metal/non-metal · Standard Gold Mining Inc · MSHA ID 2602536
    Abandoned
  81. Star Creek Mine
    Surface metal/non-metal · Phillip Geertson · MSHA ID 2601622
    Abandoned
  82. SULPHER SPRINGS PROJECT
    Surface metal/non-metal · Black Gold Mining · MSHA ID 2602447
    Abandoned
  83. SUNRISE GOLD PLACER MINE
    Surface metal/non-metal · Sunrise Minerals · MSHA ID 2602635
    Abandoned
  84. Superior Mine
    Underground metal/non-metal · Superior Mines Inc · MSHA ID 2601460
    Abandoned
  85. Superior Mine
    Surface metal/non-metal · Banner Resources Corp · MSHA ID 2601794
    Abandoned
  86. Tag Mine
    Underground metal/non-metal · F M Wright Mining Company · MSHA ID 2601373
    Abandoned
  87. Toulon Mill
    Facility metal/non-metal · Aaron Mining Inc · MSHA ID 2600610
    Abandoned
  88. TRINITY MINE
    Surface metal/non-metal · Remtech L L C · MSHA ID 2602031
    Abandoned
  89. Tungsten Mill
    Facility metal/non-metal · Tungsten Properties Ltd · MSHA ID 2601267
    Abandoned
  90. Velvet Mine
    Facility metal/non-metal · B & H Mining · MSHA ID 2601681
    Abandoned
  91. Waddy Mine
    Surface metal/non-metal · United Mining Company · MSHA ID 2601729
    Abandoned
  92. Washaki Claims
    Surface metal/non-metal · Carl E Thomsen Owner · MSHA ID 2601391
    Abandoned
  93. Wheeler Rental C3054 Jaw Crusher
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602854
    Abandoned
  94. Wheeler Rental MASABA 36
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602851
    Abandoned
  95. Wheeler Rental MASABA 36
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602852
    Abandoned
  96. Wheeler Rental MASABA 7x20 Screen Plant
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602850
    Abandoned
  97. Wheeler Rental MASABA 8x20 Screen Plant
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602853
    Abandoned
  98. Wheeler Rental METSO HP400 Cone
    Surface metal/non-metal · CONAM Construction · MSHA ID 2602849
    Abandoned
  99. Willard Mine
    Surface metal/non-metal · Western States Minerals Corp · MSHA ID 2602095
    Abandoned
  100. WILLOW CREEK
    Surface metal/non-metal · Mingus La Marr Mining Corp · MSHA ID 2601546
    Abandoned
  101. Willow Creek Operation
    Surface metal/non-metal · Ken Mc Griffin · MSHA ID 2601721
    Abandoned
  102. Willow Creek Placer- Thacker P
    Surface metal/non-metal · Western Placer Resources · MSHA ID 2602492
    Abandoned
  103. Willow Creek Project
    Surface metal/non-metal · Mining Research Inc · MSHA ID 2601912
    Abandoned
  104. Wright Mill
    Facility metal/non-metal · F M Wright Mining Company · MSHA ID 2601482
    Abandoned

Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.

By source vocabularythe publishers' own terms
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
Other counties in NevadaAll counties →
How to read these numbers

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.

Sources
  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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).
  8. 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.