Mining Incidents
Abandoned mine inventory

Abandoned mines in Knox County, Kentucky

Knox County, Kentucky has 639 mine and prospect features on USGS topographic maps published 1952–1979, including 370 mine openings (shafts, adits and air shafts). OSMRE's abandoned mine land inventory lists 33 problems in the county, 21 of them not yet reclaimed. MSHA's register carries 757 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Knox 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)
639
Mine openings
370
OSMRE problems unreclaimed
21
MSHA mines marked abandoned
757
0 features carry a name0 prospect pits16 quadrangle maps, published 1952–1979 33 OSMRE problems, 12 reclaimed 346 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
    371 55.2%
  2. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    269 40.0%
  3. Dumps, tailings, spoil and gob
    what mining left above ground
    9 1.3%
  4. Other reclamation problems
    highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
    23 3.4%
OSMRE abandoned mine land problems33 on inventory
Problem area Problem Status
Billy Helton P2 Dangerous Piles & Embankments In Reclamation
Billy Helton P2 Dangerous Slides In Reclamation
Chester Hammons P2 Dangerous Impoundments Reclamation Pending
Demps Hollow Slide P2 Clogged Stream Lands Reclamation Completed
Donnie Carnes Slides P1 Dangerous Slides Reclamation Completed
Ernest Wilson Mine Openings P2 Portals Reclamation Pending
Gregory Branch Strip P3 Bench Reclamation Pending
Gregory Branch Strip P3 Spoil Area Reclamation Pending
Hogpen Hollow Slides P2 Clogged Stream Lands Reclamation Pending
Liberty Church Road Water Supply P2 Polluted Water: Human Consumption Reclamation Completed
Marie Callebs P2 Clogged Stream Lands Reclamation Pending
Marie Callebs P3 Spoil Area Reclamation Pending
Mud Lick Mine P3 Bench Reclamation Completed
Mud Lick Mine P3 Other Reclamation Pending
Mud Lick Mine P3 Spoil Area Reclamation Completed
Poplar Br./ky Blue P3 Bench Reclamation Pending
Poplar Br./ky Blue P3 Spoil Area Reclamation Pending
Possum Hollow Slide P2 Dangerous Slides Reclamation Pending
Pre 87 P1 Dangerous Piles & Embankments Reclamation Completed
Pre 87 P2 Dangerous Piles & Embankments Reclamation Completed
Prewitt & Bennett P2 Dangerous Highwalls Reclamation Pending
Prewitt & Bennett P2 Dangerous Impoundments Reclamation Pending
Prewitt & Bennett P3 Spoil Area Reclamation Pending
Puncheon/evans Br. Slide P3 Bench Reclamation Pending
Puncheon/evans Br. Slide P3 Spoil Area Reclamation Pending
Roark Slides P1 Clogged Streams Reclamation Completed
Roark Slides P1 Dangerous Slides Reclamation Pending
Silver Diamond Slide P1 Dangerous Slides Reclamation Completed
Southeast Training Center AMLER Pro P3 Other Reclamation Pending
Southwestern Knox Co W.s. P2 Polluted Water: Human Consumption Reclamation Pending
Up Lynn Camp Cr Wtr P2 Polluted Water: Human Consumption Reclamation Completed
Wheeler Mines P2 Clogged Stream Lands Reclamation Completed
Wheeler Mines P2 Dangerous Slides Reclamation Completed

Problem types carry OSMRE's priority prefix: P1 and P2 are threats to health, safety and property, P3 is environmental. A problem area is a cluster of problems reclaimed as one project; several rows can share one location.

MSHA-registered mines with status Abandoned757 on register
  1. #1
    Underground coal · R A C Mining Corp · MSHA ID 1511893
    Abandoned and Sealed
  2. #1
    Surface coal · West Knox Mining Inc · MSHA ID 1513305
    Abandoned
  3. #1
    Underground coal · Big Man Coal Company Inc · MSHA ID 1514194
    Abandoned and Sealed
  4. #1
    Underground coal · G & P Contractors Inc · MSHA ID 1515125
    Abandoned and Sealed
  5. #1
    Underground coal · 4-G Coal Company · MSHA ID 1515143
    Abandoned and Sealed
  6. #1
    Underground coal · Four L Coal Company · MSHA ID 1515197
    Abandoned and Sealed
  7. #1
    Underground coal · Raider Mining Company · MSHA ID 1515347
    Abandoned and Sealed
  8. #1
    Underground coal · Dan'S Coal Company · MSHA ID 1515432
    Abandoned and Sealed
  9. #1
    Underground coal · N & S Coal Inc · MSHA ID 1515577
    Abandoned and Sealed
  10. #1
    Underground coal · Abraham Coal Company · MSHA ID 1515680
    Abandoned and Sealed
  11. #1
    Underground coal · New Beginning Coal Company · MSHA ID 1515743
    Abandoned and Sealed
  12. #1
    Underground coal · Swan Pond Coal Company · MSHA ID 1515805
    Abandoned and Sealed
  13. #1
    Underground coal · G & M Coal Company · MSHA ID 1515949
    Abandoned and Sealed
  14. #1
    Underground coal · Tram Mining · MSHA ID 1515988
    Abandoned and Sealed
  15. #1
    Underground coal · Shadow Coal Company · MSHA ID 1516052
    Abandoned and Sealed
  16. #1
    Underground coal · Misty Mountain Mining Inc · MSHA ID 1516210
    Abandoned and Sealed
  17. #1
    Underground coal · Fantasia Mining Company · MSHA ID 1516331
    Abandoned and Sealed
  18. #1
    Underground coal · S & S Contracting · MSHA ID 1516354
    Abandoned and Sealed
  19. #1
    Surface coal · Double M Coal Company Inc · MSHA ID 1516400
    Abandoned and Sealed
  20. #1
    Underground coal · Duke Coal Inc · MSHA ID 1516600
    Abandoned
  21. #1
    Underground coal · Blue Shale Mining Company · MSHA ID 1516712
    Abandoned and Sealed
  22. #1
    Underground coal · Mountain Enterprizes · MSHA ID 1516713
    Abandoned and Sealed
  23. #1
    Underground coal · Brownhorse Mining · MSHA ID 1516719
    Abandoned and Sealed
  24. #1
    Underground coal · Mustang Fuels Corp · MSHA ID 1516901
    Abandoned and Sealed
  25. #1
    Underground coal · Headache Coal Company Inc · MSHA ID 1516938
    Abandoned and Sealed
  26. #1
    Underground coal · Mallie Coal Company Inc · MSHA ID 1517217
    Abandoned and Sealed
  27. #1
    Underground coal · Tug Coal Company Inc · MSHA ID 1517269
    Abandoned and Sealed
  28. #1
    Surface coal · Budrow Coal Company Inc · MSHA ID 1517286
    Abandoned
  29. #1
    Underground coal · Headache Coal Company Inc · MSHA ID 1517300
    Abandoned
  30. #1
    Surface coal · ACR Coal, LLC · MSHA ID 1519634
    Abandoned
  31. #1
    Surface coal · C.W. Mining - Contractor LLC · MSHA ID 1519853
    Abandoned
  32. #1 Auger Knox
    Surface coal · Goldens Creek Enterprises Inc · MSHA ID 1516814
    Abandoned
  33. #1 Mine
    Underground coal · Moores Creek Coal Company · MSHA ID 1504001
    Abandoned
  34. #1 Mine
    Underground coal · G & L Coal Company · MSHA ID 1515233
    Abandoned and Sealed
  35. #1 Mine
    Surface coal · Black Beauty Coal Company · MSHA ID 1516037
    Abandoned and Sealed
  36. #1 Mine
    Underground coal · Quits Coal Company · MSHA ID 1516087
    Abandoned and Sealed
  37. #1 Mine
    Underground coal · Walycoal Coal Company · MSHA ID 1516128
    Abandoned and Sealed
  38. #1 Mine
    Surface coal · David Hoskins Coal Company · MSHA ID 1516137
    Abandoned
  39. #1 Mine
    Underground coal · Dorco Mining Inc · MSHA ID 1516943
    Abandoned and Sealed
  40. #1 Strip
    Surface coal · P P Coal Company · MSHA ID 1514377
    Abandoned
  41. #1 Strip
    Surface coal · F M Coal Company · MSHA ID 1514378
    Abandoned
  42. #1 Strip
    Surface coal · Silver Creek Mining Inc · MSHA ID 1516259
    Abandoned
  43. #1 Strip & Auger
    Surface coal · Phillips & Jordan Inc · MSHA ID 1517604
    Abandoned
  44. #1 Strip Mine
    Surface coal · Jamieson Construction Company Inc · MSHA ID 1517728
    Abandoned
  45. #1 Surface
    Surface coal · Clyde Coal Company Inc · MSHA ID 1511860
    Abandoned
  46. #1 Surface
    Surface coal · B R C Coal Company Inc · MSHA ID 1514332
    Abandoned
  47. #1 Surface
    Surface coal · Farmer Coal · MSHA ID 1515500
    Abandoned
  48. #1 Surface
    Surface coal · Willie B Mills Coal Company · MSHA ID 1516002
    Abandoned
  49. #1 Surface
    Surface coal · Jordon Coal Company · MSHA ID 1516141
    Abandoned and Sealed
  50. #1 Surface
    Surface coal · Buried Sunshine Transport Inc · MSHA ID 1518812
    Abandoned
  51. #10
    Underground coal · Calvary Coal Company Inc · MSHA ID 1513784
    Abandoned and Sealed
  52. #10
    Underground coal · Steel Hollow Mining Inc · MSHA ID 1516100
    Abandoned and Sealed
  53. #14
    Underground coal · K & M Coal Company Inc · MSHA ID 1514826
    Abandoned and Sealed
  54. #16
    Underground coal · K & M Coal Company Inc · MSHA ID 1517453
    Abandoned
  55. #18
    Underground coal · K & M Coal Company Inc · MSHA ID 1517823
    Abandoned and Sealed
  56. #2
    Underground coal · Birdeye Coal Company Inc · MSHA ID 1514577
    Abandoned and Sealed
  57. #2
    Underground coal · Whitley Gap Mining Inc · MSHA ID 1515484
    Abandoned and Sealed
  58. #2
    Underground coal · J R Coal Company · MSHA ID 1515797
    Abandoned and Sealed
  59. #2
    Underground coal · Big Man Coal Company Inc · MSHA ID 1516396
    Abandoned and Sealed
  60. #2
    Underground coal · Serendipity Mining Inc · MSHA ID 1516838
    Abandoned and Sealed
  61. #2
    Underground coal · Mustang Fuels Corp · MSHA ID 1516902
    Abandoned and Sealed
  62. #2 Mine
    Underground coal · Phipps Mining Company · MSHA ID 1516145
    Abandoned and Sealed
  63. #2 Strip Mine
    Surface coal · Jamieson Construction Company · MSHA ID 1518704
    Abandoned
  64. #3
    Underground coal · Brownhorse Mining · MSHA ID 1515517
    Abandoned and Sealed
  65. #3
    Underground coal · Mallie Coal Company Inc · MSHA ID 1517436
    Abandoned and Sealed
  66. #3 Mine
    Underground coal · Serendipity Mining Inc · MSHA ID 1517317
    Abandoned and Sealed
  67. #4
    Underground coal · C Y Smith Inc · MSHA ID 1515720
    Abandoned and Sealed
  68. #4
    Underground coal · 4-G Coal Company · MSHA ID 1516899
    Abandoned and Sealed
  69. #4 Mine
    Underground coal · Birdeye Coal Company Inc · MSHA ID 1517676
    Abandoned and Sealed
  70. #5
    Underground coal · C & H Mining · MSHA ID 1514028
    Abandoned and Sealed
  71. #5
    Underground coal · Birdeye Coal Company Inc · MSHA ID 1517255
    Abandoned and Sealed
  72. #5
    Underground coal · Mallie Coal Company Inc · MSHA ID 1517314
    Abandoned and Sealed
  73. #5 Auger
    Surface coal · Trosper Mining Inc · MSHA ID 1518027
    Abandoned
  74. 010 Salem 1500 B
    Surface coal · Jean Coal Company LLC · MSHA ID 1518796
    Abandoned
  75. 459 Job
    Surface coal · Alden Resources LLC · MSHA ID 1519338
    Abandoned
  76. 459 Mine #19
    Surface coal · Alden Resources LLC · MSHA ID 1519388
    Abandoned
  77. AHM Tipple
    Facility coal · American Highwall Mining, LLC · MSHA ID 1511319
    Abandoned
  78. Alden Resources, LLC #6
    Underground coal · Alden Resources, LLC · MSHA ID 1519486
    Abandoned
  79. Alex Creek No 1 Mine
    Surface coal · D & M Coal Company · MSHA ID 1514129
    Abandoned
  80. Amswiss No 1 Mine
    Surface coal · Coal Resources Ltd · MSHA ID 1513129
    Abandoned
  81. Arkle Crossing
    Surface coal · London Coal Company · MSHA ID 1513419
    Abandoned
  82. Arkle Crossing
    Surface coal · John Evans Excavating · MSHA ID 1513588
    Abandoned
  83. Arkle No 1
    Surface coal · Hutton Coal Company · MSHA ID 1514111
    Abandoned
  84. Artemus Strip No 1
    Surface coal · Providence Mining & Management · MSHA ID 1513145
    Abandoned and Sealed
  85. Artemus Tipple
    Facility coal · Nally & Hamilton Enterprises Inc · MSHA ID 1505315
    Abandoned
  86. Auger Mine #1
    Surface coal · Bargo & Son · MSHA ID 1512150
    Abandoned
  87. B & E #1
    Underground coal · B & E Coal Company · MSHA ID 1513400
    Abandoned and Sealed
  88. B J #1
    Underground coal · B J Coal Company · MSHA ID 1512756
    Abandoned and Sealed
  89. Bain Branch #1
    Surface coal · Alden Resources LLC · MSHA ID 1519442
    Abandoned
  90. Barbourville Prep Plant
    Facility coal · Richland Coal Company · MSHA ID 1504565
    Abandoned
  91. Bertha Tipple
    Facility coal · Pinemark Inc · MSHA ID 1513038
    Abandoned
  92. Bob Bray Mountain
    Surface coal · Wash Ridge Coal Co. · MSHA ID 1519001
    Abandoned
  93. Bob Bray Mountain Mine
    Surface coal · Csb Ii Inc · MSHA ID 1518395
    Abandoned
  94. Borrow Pit
    Surface coal · London Bridge Company Inc · MSHA ID 1512312
    Abandoned
  95. Brushy Mountain
    Surface coal · Nally & Hamilton Enterprises, Inc. · MSHA ID 1519201
    Abandoned
  96. Brushy Mountain #2
    Surface coal · Brushy Mountain Coal Company Inc · MSHA ID 1516175
    Abandoned and Sealed
  97. Bryants Store Mine
    Surface coal · Alden Resources LLC · MSHA ID 1519864
    Abandoned
  98. Brydet Auger #21
    Surface coal · Mountainside Coal Company Inc · MSHA ID 4003238
    Abandoned
  99. Bull Creek Surface #1
    Surface coal · Cumberland Processing Corp · MSHA ID 1515911
    Abandoned and Sealed
  100. C R S Energy #7
    Surface coal · Bradley Equipment Company Inc · MSHA ID 1515370
    Abandoned and Sealed
  101. C Y Smith #8
    Underground coal · C Y Smith Inc · MSHA ID 1515880
    Abandoned and Sealed
  102. Canfield #1
    Underground coal · Canfield Energy Inc · MSHA ID 1514763
    Abandoned and Sealed
  103. Canfield #2
    Underground coal · Canfield Energy Inc · MSHA ID 1513873
    Abandoned and Sealed
  104. Canfield #4
    Underground coal · Canfield Energy Inc · MSHA ID 1517716
    Abandoned and Sealed
  105. Catron Branch Mine #1
    Surface coal · Alden Resources LLC · MSHA ID 1519245
    Abandoned
  106. Catron No 1 Mine
    Surface coal · Compliance Coal Company Inc · MSHA ID 1513184
    Abandoned
  107. Charcoal No 1
    Underground coal · Lakeshore Equipment Company Inc · MSHA ID 1516250
    Abandoned and Sealed
  108. CHM -102
    Surface coal · Contract Highwall Mining LLC · MSHA ID 1518730
    Abandoned
  109. Christian No 1
    Underground coal · Christian Energies Inc · MSHA ID 1515763
    Abandoned and Sealed
  110. Clark Strip
    Surface coal · Clarks Excavating & Black Topping Inc · MSHA ID 1508988
    Abandoned
  111. Clay Co Mining
    Surface coal · Sue Ann Coal Company Inc · MSHA ID 1515198
    Abandoned
  112. Concord No 1 Tipple
    Facility coal · Concord Coal Processing Company Inc · MSHA ID 1514193
    Abandoned
  113. Corbin Paving Corporation
    Facility coal · Corbin Paving Corp · MSHA ID 1511570
    Abandoned
  114. County Road Project
    Surface coal · Sugartree Corp · MSHA ID 1514232
    Abandoned
  115. Davis Bend #1
    Surface coal · Davis Bend Coal Co. LLC · MSHA ID 1518762
    Abandoned
  116. Davis Branch
    Underground coal · Jellico Enterprise, LLC · MSHA ID 1518560
    Abandoned
  117. Dewitt Job
    Surface coal · Whymore Coal Company Inc · MSHA ID 1517967
    Abandoned
  118. Dusty Fork Mine
    Surface coal · F & G Resourses LLC · MSHA ID 1518348
    Abandoned
  119. Ed Gaunt
    Surface coal · Ed Gaunt · MSHA ID 1519520
    Abandoned
  120. Elliott Branch
    Surface coal · Alden Resources LLC · MSHA ID 1519387
    Abandoned
  121. Ely Fuel Prep Plant
    Facility coal · Ely Fuel Company · MSHA ID 1513576
    Abandoned
  122. Ely Hollow Deep Mine
    Underground coal · Sterling Energy Inc · MSHA ID 1511652
    Abandoned and Sealed
  123. Energy Ventures #1
    Underground coal · Energy Ventures Corp · MSHA ID 1512751
    Abandoned and Sealed
  124. Engle Hollow #1
    Underground coal · G & P Contractors Inc · MSHA ID 1517777
    Abandoned and Sealed
  125. Engle Hollow #2
    Underground coal · G & P Contractors Inc · MSHA ID 1517778
    Abandoned and Sealed
  126. Engle Hollow Mine
    Surface coal · Alden Resources LLC · MSHA ID 1519096
    Abandoned
  127. Epa No 1
    Surface coal · Energy Producers Of America · MSHA ID 1508794
    Abandoned
  128. Fawn Branch
    Surface coal · JMR Resources, LLC · MSHA ID 1519926
    Abandoned
  129. Fire Ring Fuels No 3
    Surface coal · Fire Ring Fuels Inc · MSHA ID 1512906
    Abandoned
  130. Flag Ridge
    Surface coal · Mountainside Coal Co., Inc. · MSHA ID 1519627
    Abandoned
  131. Flat Creek Mine
    Surface coal · Mountainside Coal Co., Inc. · MSHA ID 1519696
    Abandoned
  132. Foley No 1
    Surface coal · Carlton Foley · MSHA ID 1514173
    Abandoned and Sealed
  133. G M No 3
    Surface coal · G M Coal Company · MSHA ID 1514919
    Abandoned
  134. Gatliff No 2
    Surface coal · Gatliff Coal Company Inc · MSHA ID 1510392
    Abandoned
  135. Gatliff Tipple #3
    Facility coal · Gatliff Coal Company Inc · MSHA ID 1506809
    Abandoned
  136. Gh Strip No 3
    Surface coal · Green Hill Mining Inc · MSHA ID 1516165
    Abandoned and Sealed
  137. GHM-Knox #037
    Surface coal · Green Hill Mining Inc · MSHA ID 1517574
    Abandoned
  138. Gideon Coal Company #2
    Underground coal · Gideon Coal Company · MSHA ID 1517143
    Abandoned and Sealed
  139. Gideon Mine #2
    Underground coal · Gideon Coal Company · MSHA ID 1515033
    Abandoned and Sealed
  140. Gilco No 1
    Surface coal · Gilco Energy · MSHA ID 1514078
    Abandoned
  141. Gooden Branch
    Surface coal · Express Co Inc · MSHA ID 1519067
    Abandoned
  142. Goodin Creek
    Underground coal · Goodin Creek Contracting Inc · MSHA ID 1517980
    Abandoned
  143. Goodin Creek # 1 & 2 Refuge Area
    Surface coal · Alden Resources LLC · MSHA ID 1519152
    Abandoned
  144. Gray Tipple
    Facility coal · H Tims Coal Processing, Inc · MSHA ID 1512628
    Abandoned
  145. Gray's Excavating Inc Mine #5
    Surface coal · Gray's Excavating Inc · MSHA ID 1519524
    Abandoned
  146. H M C Tipple
    Facility coal · H M C Tipple Corp · MSHA ID 1512001
    Abandoned
  147. Hayes Gap
    Surface coal · Loudermilk Contracting Inc · MSHA ID 1519816
    Abandoned
  148. Helton Branch
    Surface coal · J.R. Mining, Inc. · MSHA ID 1518844
    Abandoned
  149. Hilton No 1 Strip
    Surface coal · Hilton Mining Corp · MSHA ID 1511100
    Abandoned
  150. Hubbs Creek
    Surface coal · Renfro Construction Company Inc · MSHA ID 1511941
    Abandoned

…and 607 more mines not listed here.

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
Adit 370
Strip Mine 247
Strip Mine 22
P3 Spoil Area 6
P3 Bench 4
P2 Clogged Stream Lands 4
P1 Dangerous Slides 3
P2 Dangerous Slides 3
P2 Polluted Water: Human Consumption 3
P2 Dangerous Impoundments 2
P2 Dangerous Piles & Embankments 2
P3 Other 2
P1 Clogged Streams 1
P2 Dangerous Highwalls 1
P1 Dangerous Piles & Embankments 1
P2 Portals 1
Other counties in KentuckyAll 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.