Abandoned mines in Mohave County, Arizona

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   2,079 36.2%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   3,382 58.8%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   122 2.1%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   131 2.3%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   35 0.6%

…and 37 more named features not listed here.

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.

1. 12-13 El Jay Portable Crusher

   Surface metal/non-metal · Tanner Companies · MSHA ID 0202407
   Abandoned 1994-06-16
2. ACM BRUCITE

   Underground metal/non-metal · Applied Chemical Magnesias Corp · MSHA ID 0202801
   Abandoned 2000-11-13
3. ACM BRUCITE

   Surface metal/non-metal · Applied Chemical Magnesias Corp · MSHA ID 0202861
   Abandoned 2004-07-26
4. AL/FAR #1

   Surface metal/non-metal · Al/Far Mining Company Llc · MSHA ID 0202844
   Abandoned 2000-12-06
5. AQUARIUS XXV

   Surface metal/non-metal · Aquarius Minerals Inc · MSHA ID 0202793
   Abandoned 2000-02-14
6. ARIZONA GREENSANDS

   Surface metal/non-metal · Enviroverde Llc · MSHA ID 0202871
   Abandoned 2000-07-27
7. Arizona Nevada Concrete & Material

   Surface metal/non-metal · Arizona Nevada Concrete & Material · MSHA ID 0202356
   Abandoned 1988-02-22
8. Arizona Rock & Sand

   Surface metal/non-metal · Martin & Brown Inc · MSHA ID 0202535
   Abandoned 1993-11-30
9. Asphalt Materials Pit

   Surface metal/non-metal · Asphalt Materials Company · MSHA ID 0201462
   Abandoned 1979-10-18
10. AZTEC ROCK & ASPHALT

    Surface metal/non-metal · Southern Arizona Paving & Construction Company · MSHA ID 0202566
    Abandoned 2000-08-01
11. B & L Portable Crusher

    Surface metal/non-metal · B & L Inc · MSHA ID 0202390
    Abandoned 1990-03-26
12. Baseline Materials Pit

    Surface metal/non-metal · Pulice Construction Inc · MSHA ID 0202475
    Abandoned 1991-03-04
13. BEAVER DAM

    Surface metal/non-metal · Green Valley Rock LLC · MSHA ID 0203114
    Abandoned 2007-05-15
14. Beaver Dam Arizona

    Surface metal/non-metal · Sunroc Corporation · MSHA ID 0202690
    Abandoned 2011-01-01
15. BEAVER DAM EXCAVATING

    Surface metal/non-metal · Beaver Dam Excavating · MSHA ID 0202914
    Abandoned 2003-09-05
16. Black Eagle

    Surface metal/non-metal · Unity Properties Inc · MSHA ID 0202530
    Abandoned 1991-06-17
17. Black Mountain Farms Pit

    Surface metal/non-metal · Rio Aggregate Services Inc. · MSHA ID 0203406
    Abandoned 2023-12-01
18. Black Mountain Sand & Gravel Company

    Surface metal/non-metal · Black Mountain Sand & Gravel Company · MSHA ID 0202570
    Abandoned 1994-08-26
19. Black Rock Quarry

    Surface metal/non-metal · Georgia-Pacific Gypsum LLC · MSHA ID 0203129
    Abandoned 2007-06-11
20. Blackrock Gypsum Mine

    Surface metal/non-metal · Seubert Excavators Inc · MSHA ID 0202369
    Abandoned 1991-07-22
21. Bones Stone and Sand

    Surface metal/non-metal · Bones Stone and Sand, LLC · MSHA ID 0203433
    Abandoned 2020-10-27
22. Boundary Cone Pit

    Surface metal/non-metal · Mohave County Road Department · MSHA ID 0202335
    Abandoned 2007-04-02
23. Bozo Mine

    Surface metal/non-metal · Bozo Mining Co-Op · MSHA ID 0202022
    Abandoned 1981-10-22
24. Bullhead City Batch Plant & Pit

    Surface metal/non-metal · Meadow Valley Contractors · MSHA ID 0202201
    Abandoned 1985-02-25
25. Bullhead City Pit

    Surface metal/non-metal · Mc Cormick Properties · MSHA ID 0201721
    Abandoned 1979-05-31
26. Burright'S Construction Plant

    Surface metal/non-metal · Pat Burright · MSHA ID 0202449
    Abandoned 1996-07-08
27. C B H Limited Partnership

    Surface metal/non-metal · C B H Limited Partnership · MSHA ID 0202456
    Abandoned 1990-03-19
28. C O D Mine

    Underground metal/non-metal · Alanco Ltd · MSHA ID 0200328
    Abandoned 1986-12-04
29. Canyon City Milling Company

    Facility metal/non-metal · Canyon City Milling Company · MSHA ID 0202326
    Abandoned 1990-08-27
30. Canyon Concrete No 2231

    Surface metal/non-metal · Canyon Redi-Mix · MSHA ID 0202973
    Abandoned 2009-09-29
31. CANYON SAND INC

    Surface metal/non-metal · Canyon Sand Inc · MSHA ID 0202477
    Abandoned 2004-06-07
32. Canyon Site

    Surface metal/non-metal · Mineral Park Materials, LLC · MSHA ID 0203170
    Abandoned 2012-08-30
33. CHENOWETH PIT

    Surface metal/non-metal · D L Campbell Company Inc · MSHA ID 0202380
    Abandoned 2003-11-19
34. CHLORIDE PIT

    Surface metal/non-metal · Terra Resources Inc · MSHA ID 0202695
    Abandoned 1997-12-04
35. CHRIS BLYTHE AGGREGATE

    Surface metal/non-metal · Chris Blythe Backhoe Service · MSHA ID 0202911
    Abandoned 2008-05-08
36. City Screen Plant

    Surface metal/non-metal · Town Of Colorado City And Municipality · MSHA ID 0203379
    Abandoned 2022-12-20
37. Copper Mountain

    Underground metal/non-metal · Uranerz U S A Inc · MSHA ID 0202269
    Abandoned 1986-06-10
38. Corval Mill

    Facility metal/non-metal · Corval Development Inc · MSHA ID 0201913
    Abandoned 1986-12-03
39. D & B Portable

    Surface metal/non-metal · D & R Excavating · MSHA ID 0203152
    Abandoned 2009-02-11
40. D & R Portable

    Surface metal/non-metal · D & R Excavating · MSHA ID 0202926
    Abandoned 2009-05-13
41. D W Ranch Pit

    Surface metal/non-metal · McCormick Construction Company · MSHA ID 0203025
    Abandoned 2004-04-19
42. D. L. Poole & Sons

    Surface metal/non-metal · D. L. Poole & Sons · MSHA ID 0203132
    Abandoned 2010-03-17
43. Detrital Sand and Gravel Pit

    Surface metal/non-metal · Ready Mix Inc · MSHA ID 0203117
    Abandoned 2008-01-10
44. Devil's Dip Materials

    Surface metal/non-metal · Craig's Operated Equipment · MSHA ID 0203045
    Abandoned 2011-02-01
45. Diamond Rebel Red Mine

    Surface metal/non-metal · Silver State Transportation · MSHA ID 0203028
    Abandoned 2005-04-19
46. Diplomat

    Underground metal/non-metal · Cerbat Corp · MSHA ID 0202065
    Abandoned 1982-04-13
47. DSA PIT

    Surface metal/non-metal · Desert Springs Aggregate LLC. · MSHA ID 0203478
    Abandoned 2024-09-13
48. Elbe Crusher

    Surface metal/non-metal · Elbe Drilling & Blasting Inc · MSHA ID 0203052
    Abandoned 2006-11-08
49. Emerald Isle

    Surface metal/non-metal · SGV Resources Inc · MSHA ID 0202406
    Abandoned 1992-09-01
50. Empire Mine

    Underground metal/non-metal · Jaylee Inc · MSHA ID 0201983
    Abandoned 1982-02-10
51. ENVIROVERDE MOHAVE PIT

    Surface metal/non-metal · Enviroverde Llc · MSHA ID 0202852
    Abandoned 2003-07-21
52. Eureka

    Underground metal/non-metal · Corval Development Inc · MSHA ID 0202123
    Abandoned 1984-06-08
53. EUREKA #5

    Surface metal/non-metal · Desert Rock Products Inc · MSHA ID 0202699
    Abandoned 1997-11-25
54. EUREKA ROSE

    Surface metal/non-metal · Eureka Mining · MSHA ID 0202760
    Abandoned 2010-09-01
55. Excelisor

    Surface metal/non-metal · D S Mine & Development LLC · MSHA ID 0202672
    Abandoned 2005-02-02
56. Extec S-5 2000

    Surface metal/non-metal · Chase Crushing · MSHA ID 0203062
    Abandoned 2008-12-08
57. Extec S-5 2003

    Surface metal/non-metal · Chase Crushing · MSHA ID 0203063
    Abandoned 2008-04-23
58. Fayro No 1

    Surface metal/non-metal · Fayro Mining Company · MSHA ID 0201756
    Abandoned 1980-04-30
59. Foot Hill Mine

    Surface metal/non-metal · Foothill Iftiger LLC · MSHA ID 0203297
    Abandoned 2013-02-25
60. Fort Mohave

    Surface metal/non-metal · S&S Concrete & Materials · MSHA ID 0203321
    Abandoned 2014-10-14
61. Fort Mohave Pit

    Surface metal/non-metal · Sunshine Concrete & Materials Inc · MSHA ID 0202253
    Abandoned 2010-08-26
62. Fountain Head

    Underground metal/non-metal · Harrison Mining · MSHA ID 0202243
    Abandoned 1986-04-21
63. Freiday Pit And Plant

    Surface metal/non-metal · Freiday Construction Inc · MSHA ID 0201374
    Abandoned 1980-09-11
64. Freiday Portable Crusher

    Surface metal/non-metal · Freiday Construction Inc · MSHA ID 0202383
    Abandoned 2013-02-25
65. Frisco Gold Corp Mine

    Surface metal/non-metal · Frisco Gold Corporation · MSHA ID 0202172
    Abandoned 2026-08-03
66. G Y Mine

    Surface metal/non-metal · JP Project LLC · MSHA ID 0203277
    Abandoned 2014-07-28
67. Golconda

    Surface metal/non-metal · Resource Partners Ltd · MSHA ID 0202057
    Abandoned 1983-08-25
68. Golconda Mine

    Surface metal/non-metal · Sedco Resources Inc. · MSHA ID 0203358
    Abandoned 2016-02-22
69. Gold Bug Mine

    Underground metal/non-metal · G R Haynes · MSHA ID 0202358
    Abandoned 1991-08-07
70. Gold Remedy Mine

    Surface metal/non-metal · DWRGRM, LLC · MSHA ID 0203281
    Abandoned 2013-09-30
71. Gold Springs Mine & Mill

    Surface metal/non-metal · Gold Springs Mine & Mill · MSHA ID 0202439
    Abandoned 1991-09-11
72. Gold Standards Mill

    Facility metal/non-metal · Gold Standard Mines Corp · MSHA ID 0202405
    Abandoned 1990-01-09
73. Golden Door Project (Dixie Queen Mill)

    Surface metal/non-metal · Trv Minerals Corp · MSHA ID 0202051
    Abandoned 1982-09-23
74. Golden Gem

    Underground metal/non-metal · American International Minerals Corp · MSHA ID 0202089
    Abandoned 1982-02-25
75. Golden Rule #4

    Surface metal/non-metal · Brant Mining Company Inc · MSHA ID 0201994
    Abandoned 1982-04-13
76. GoldenValley Rock & Materials LLC

    Surface metal/non-metal · Golden Valley Rock & Materials LLC · MSHA ID 0203283
    Abandoned 2013-06-29
77. Goldilocks

    Surface metal/non-metal · Noble Metal Kings, LLC · MSHA ID 0203345
    Abandoned 2014-12-04
78. Goran Portable #1

    Surface metal/non-metal · Goran LLC · MSHA ID 0203314
    Abandoned 2013-10-01
79. Grubstake Incorporated

    Underground metal/non-metal · Grubstake Inc · MSHA ID 0202327
    Abandoned 1990-04-24
80. Gunslinger

    Underground metal/non-metal · Corval Development Inc · MSHA ID 0201971
    Abandoned 1985-11-20
81. Hackberry

    Underground metal/non-metal · Combined Metals Reduction Company · MSHA ID 0202473
    Abandoned 1990-09-18
82. Hackberry Mine

    Surface metal/non-metal · Hemphill Brothers Inc · MSHA ID 0201895
    Abandoned 1978-12-14
83. Hackberry Road Pit

    Surface metal/non-metal · Ashton Company Inc · MSHA ID 0201809
    Abandoned 1978-11-29
84. Hacks Canyon 1

    Underground metal/non-metal · Energy Fuels Nuclear Inc · MSHA ID 0202058
    Abandoned 1984-08-28
85. Hacks Canyon 2

    Underground metal/non-metal · Energy Fuels Nuclear Inc · MSHA ID 0201973
    Abandoned 1988-04-18
86. Hancock Pit

    Surface metal/non-metal · Mc Cormick Properties · MSHA ID 0201162
    Abandoned 1980-04-17
87. Hart & Associate Mine

    Surface metal/non-metal · H & H Associates · MSHA ID 0201966
    Abandoned 1980-08-14
88. Havasu #1

    Surface metal/non-metal · Cibola Metals Corp · MSHA ID 0202305
    Abandoned 1990-03-21
89. Havasu Materials

    Surface metal/non-metal · Havasu Materials · MSHA ID 0202468
    Abandoned 1994-12-21
90. Hell's Canyon Quarry

    Surface metal/non-metal · Black Mesa Resources LLC · MSHA ID 0203241
    Abandoned 2017-01-04
91. Hi-Grade Materials Bullhead City Quarry

    Surface metal/non-metal · Hi-Grade Materials · MSHA ID 0202557
    Abandoned 1993-12-09
92. Holy Moses Pit

    Surface metal/non-metal · Desert Construction Inc · MSHA ID 0202333
    Abandoned 1987-04-09
93. Houston-Kingman Mine

    Surface metal/non-metal · Houston-Kingman Mine · MSHA ID 0202026
    Abandoned 1983-03-02
94. Huke Pit

    Surface metal/non-metal · R&G Sand & Gravel · MSHA ID 0203154
    Abandoned 2007-02-09
95. Hulda

    Underground metal/non-metal · Continental Silver · MSHA ID 0201969
    Abandoned 1982-09-20
96. Ida

    Underground metal/non-metal · Quincy R Crain · MSHA ID 0201903
    Abandoned 1981-09-10
97. Intermountain Gravel Pit

    Surface metal/non-metal · Intermountain Construction · MSHA ID 0202513
    Abandoned 1991-09-03
98. Joshua Valley Gravel

    Surface metal/non-metal · Joshua Valley Gravel Company · MSHA ID 0202549
    Abandoned 1992-04-13
99. Juniper Mine

    Underground metal/non-metal · Juniper Mines Ltd Partnership · MSHA ID 0201961
    Abandoned 1980-04-17
100. Kanab North

     Underground metal/non-metal · EFR Arizona Strip LLC · MSHA ID 0202132
     Abandoned 1993-03-01
101. Kingman Briggs

     Surface metal/non-metal · Kingman Briggs, LLC · MSHA ID 0203366
     Abandoned 2017-01-03
102. Kingman Crushing

     Surface metal/non-metal · Wesapi · MSHA ID 0202309
     Abandoned 1989-05-08
103. Kingman Div Plant #1

     Surface metal/non-metal · Arc Materials Corp D/B/A Wmk Transit Mix · MSHA ID 0200730
     Abandoned 1984-07-10
104. Kingman Mill

     Facility metal/non-metal · American International Minerals Corp · MSHA ID 0202035
     Abandoned 1982-03-03
105. Kingman Pit

     Surface metal/non-metal · Sun Valley Crushing Company · MSHA ID 0202270
     Abandoned 1985-06-01
106. Kingman Quarry/McConnico

     Surface metal/non-metal · Sunshine Concrete & Materials Inc · MSHA ID 0202593
     Abandoned 2010-08-26
107. Koleman Portable Screening Plant

     Surface metal/non-metal · Mohave Concrete & Materials Inc · MSHA ID 0202306
     Abandoned 1986-09-26
108. Lake Havasu Operations Price Dr

     Surface metal/non-metal · Sunshine Concrete & Materials Inc · MSHA ID 0201154
     Abandoned 2007-05-31
109. Lake Havasu Pit

     Surface metal/non-metal · McCormick Construction Company · MSHA ID 0203069
     Abandoned 2011-04-25
110. Lake Havasu Santa Fe Pit

     Surface metal/non-metal · Sunshine Concrete & Materials Inc · MSHA ID 0202989
     Abandoned 2005-04-20
111. Lake Juniper (Portable)

     Surface metal/non-metal · Garratt Company · MSHA ID 0202497
     Abandoned 1991-09-11
112. Lead Bullet

     Underground metal/non-metal · Geneva Mines Ltd · MSHA ID 0201987
     Abandoned 1982-06-03
113. LONG MOUNTAIN VALLEY PIT

     Surface metal/non-metal · Poli-Gold Llc · MSHA ID 0202722
     Abandoned 1998-02-09
114. Lost Basin Mine

     Surface metal/non-metal · Lost Basin Management Company · MSHA ID 0201810
     Abandoned 1980-03-27
115. Lucky Della Mine

     Surface metal/non-metal · L&D Excavation LLC · MSHA ID 0203475
     Abandoned 2023-05-30
116. Martinie Mine 1

     Surface metal/non-metal · Martinie Concrete · MSHA ID 0202308
     Abandoned 1990-03-19
117. MC CALL PIT

     Surface metal/non-metal · Mc Call Construction · MSHA ID 0202688
     Abandoned 2011-09-10
118. Meadow Creek Pit

     Surface metal/non-metal · Desert Construction Inc · MSHA ID 0201064
     Abandoned 2021-10-01
119. Meadview Claims

     Surface metal/non-metal · Joshua Mining Company · MSHA ID 0201995
     Abandoned 1981-06-15
120. Midnight Group

     Surface metal/non-metal · Continental Mining Consultant Inc · MSHA ID 0202002
     Abandoned 1981-12-01
121. Miller Mining Pit #2 Earth Materials

     Surface metal/non-metal · Miller Mining · MSHA ID 0202576
     Abandoned 1992-09-08
122. Mineral Park Materials, LLC

     Surface metal/non-metal · Mineral Park Materials, LLC · MSHA ID 0202546
     Abandoned 2013-02-25
123. Mineral Park Mine

     Surface metal/non-metal · Duval Corp · MSHA ID 0200142
     Abandoned 1982-04-14
124. Mohave Hope

     Surface metal/non-metal · Mohave Hope Mine Inc · MSHA ID 0202053
     Abandoned 1983-08-26
125. MOHAVE MINE

     Surface metal/non-metal · Combined Metals Reduction Company · MSHA ID 0202634
     Abandoned 2000-03-21
126. Mohave Quarry & Supply

     Surface metal/non-metal · Rio Stone · MSHA ID 0203226
     Abandoned 2009-06-11
127. mountain mine

     Surface metal/non-metal · Mountain Mines · MSHA ID 0203459
     Abandoned 2023-05-30
128. Music Mountain Flagstone

     Surface metal/non-metal · Music Mountain Flagstone · MSHA ID 0202858
     Abandoned 2010-05-26
129. New Valentine

     Surface metal/non-metal · Rock Pros USA LLC · MSHA ID 0203100
     Abandoned 2026-08-31
130. Old Colony Tunnel

     Underground metal/non-metal · Juniper Mines Ltd Partnership · MSHA ID 0201975
     Abandoned 1980-08-26
131. On An On Corporation

     Surface metal/non-metal · On An On Corp · MSHA ID 0202519
     Abandoned 1993-08-16
132. Pac Mine

     Facility metal/non-metal · Lee Mining Corp · MSHA ID 0202133
     Abandoned 1984-05-24
133. Pass Canyon Pit

     Surface metal/non-metal · McCormick Construction Company · MSHA ID 0203070
     Abandoned 2005-05-09
134. PE 120

     Surface metal/non-metal · C S McCrossan Inc · MSHA ID 0203047
     Abandoned 2015-12-14
135. Peacock Pit

     Surface metal/non-metal · Desert Construction, Inc · MSHA ID 0203456
     Abandoned 2022-10-24
136. Perco Rock / Portable

     Surface metal/non-metal · Perco Rock Company · MSHA ID 0203440
     Abandoned 2021-06-30
137. Pinal Materials Co Inc Hulet Road Pit

     Facility metal/non-metal · Pinal Materials Company Inc · MSHA ID 0202392
     Abandoned 1989-05-08
138. Pinenut

     Underground metal/non-metal · EFR Arizona Strip LLC · MSHA ID 0202286
     Abandoned 2015-12-21
139. Pinkiham

     Surface metal/non-metal · Advance Mining & Milling · MSHA ID 0202134
     Abandoned 1985-05-08
140. Pioneer Group Mine

     Surface metal/non-metal · Eagle Pioneer Mine, LLC · MSHA ID 0203392
     Abandoned 2025-03-03
141. Pioneer Materials Incorporated Screening

     Surface metal/non-metal · Pioneer Materials Inc · MSHA ID 0202548
     Abandoned 1991-06-24
142. Pioneer Rock Crusher Equipment E79-106

     Surface metal/non-metal · Arizona Department Of Transportation · MSHA ID 0201925
     Abandoned 1980-10-31
143. Pit #1 Wash Plant

     Surface metal/non-metal · Continental Golf and Construction · MSHA ID 0202986
     Abandoned 2013-10-01
144. Plant #4

     Surface metal/non-metal · Southwest Rock Products LLC · MSHA ID 0203110
     Abandoned 2009-07-27
145. Plant 1

     Surface metal/non-metal · WestRock, LLC. · MSHA ID 0203329
     Abandoned 2015-02-27
146. Pope Mine

     Surface metal/non-metal · Pope Mining Inc · MSHA ID 0201855
     Abandoned 1979-02-01
147. Portable

     Surface metal/non-metal · Grand Wash Excavating Inc · MSHA ID 0202974
     Abandoned 2007-03-05
148. PORTABLE

     Surface metal/non-metal · Resized Rock Inc · MSHA ID 0202691
     Abandoned 2009-08-06
149. Portable #1

     Surface metal/non-metal · Wesapi · MSHA ID 0202517
     Abandoned 1992-09-21
150. Portable #1

     Surface metal/non-metal · T & F Enterprises Inc · MSHA ID 0202845
     Abandoned 2005-08-01

…and 62 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.

• La Paz County 5,030
• Pima County 4,684
• Yavapai County 3,585
• Gila County 3,401
• Pinal County 3,289
• Maricopa County 3,227
• Cochise County 3,108
• Yuma County 1,743
• Santa Cruz County 1,696
• Coconino County 1,397
• Greenlee County 1,312
• Graham County 656

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.