Abandoned mines in Inyo County, California

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   4,399 38.3%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   6,581 57.4%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   218 1.9%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   241 2.1%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   34 0.3%
6. Mills, tipples and facilities

   processing plants and hazardous structures
   2 0.0%

…and 109 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. 7/11 Materials - Adams Pit

   Surface metal/non-metal · 7/11 Materials Inc · MSHA ID 0404777
   Abandoned 2011-07-18
2. Acme Mine

   Underground metal/non-metal · Pfizer Inc · MSHA ID 0401092
   Abandoned 1980-02-14
3. Alliance Group

   Surface metal/non-metal · America'S Finest Talc Company · MSHA ID 0404391
   Abandoned 1981-05-18
4. Apex Excelior Mine

   Underground metal/non-metal · Pfizer Inc · MSHA ID 0401093
   Abandoned 1980-02-14
5. Ash Meadows Pit

   Surface metal/non-metal · East West Minerals Inc · MSHA ID 0405026
   Abandoned 1992-02-20
6. Ash Meadows Pit & Plant

   Facility metal/non-metal · Anaconda Minerals Company · MSHA ID 0404369
   Abandoned 1982-09-08
7. B J Mine

   Surface metal/non-metal · B J V Corp · MSHA ID 0405091
   Abandoned 1990-12-26
8. Beagle Sam Mine

   Surface metal/non-metal · Delthe Resources Corp · MSHA ID 0404474
   Abandoned 1981-06-15
9. Billie Mine

   Underground metal/non-metal · American Borate Company · MSHA ID 0404218
   Abandoned 2007-11-29
10. Bishop Mill

    Facility metal/non-metal · 0877887 BC LTD · MSHA ID 0404626
    Abandoned 1989-08-29
11. Blacksprings Clay Pit

    Surface metal/non-metal · Blacksprings Clay Company · MSHA ID 0405059
    Abandoned 1991-12-10
12. Bonny Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0401094
    Abandoned 1983-12-01
13. Boraxo Mill

    Surface metal/non-metal · American Borate Company · MSHA ID 0401645
    Abandoned 1979-01-01
14. Bostrum Talc

    Underground metal/non-metal · Cal-Vada Mining · MSHA ID 0404892
    Abandoned 1988-01-01
15. Briggs

    Surface metal/non-metal · Cr Briggs · MSHA ID 0404860
    Abandoned 1991-06-12
16. Briggs Mine

    Surface metal/non-metal · DV Natural Resources, LLC · MSHA ID 0405276
    Abandoned 2019-10-15
17. C 1 Clay Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404342
    Abandoned 1985-05-21
18. Cal Pumice Sand & Gravel

    Surface metal/non-metal · Cal Pumice Inc · MSHA ID 0404661
    Abandoned 1984-05-24
19. California Clay Pit

    Surface metal/non-metal · Imv-Div/Floridin Company · MSHA ID 0405170
    Abandoned 1992-06-15
20. California Hectorite Pit

    Surface metal/non-metal · BYK USA LLC · MSHA ID 0405884
    Abandoned 2025-09-09
21. Canica Crusher #929-Lone Pine

    Surface metal/non-metal · BJ Rees's Enterprise · MSHA ID 0405674
    Abandoned 2007-02-05
22. Comet Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404341
    Abandoned 1984-09-25
23. Coso Mine

    Surface metal/non-metal · American Pumice Products Inc · MSHA ID 0404245
    Abandoned 1985-12-15
24. Cottonwood Batch Plant

    Surface metal/non-metal · City Of L A Department Of Water & Power · MSHA ID 0404524
    Abandoned 1982-11-15
25. CR Briggs Underground

    Underground metal/non-metal · C.R. Briggs · MSHA ID 0405497
    Abandoned 2002-07-26
26. Crater & Kathy Mine

    Surface metal/non-metal · American Sulfur Products · MSHA ID 0405063
    Abandoned 1995-06-26
27. CRYSTAL SPRINGS CANYON

    Surface metal/non-metal · Canyon Mines & Minerals · MSHA ID 0404743
    Abandoned 2000-09-07
28. Darwin Mines

    Surface metal/non-metal · Blue Range Mining Company L P · MSHA ID 0404495
    Abandoned 1991-01-18
29. Darwin Operation

    Facility metal/non-metal · Darwin Mineral Ventures L P · MSHA ID 0405162
    Abandoned 1996-04-10
30. Darwin U G

    Surface metal/non-metal · Blue Range Mining Company L P · MSHA ID 0405021
    Abandoned 1992-05-04
31. Death Valley Area Mines

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0400585
    Abandoned 1988-05-01
32. E.W.T

    Surface metal/non-metal · Big Pine Distributors · MSHA ID 0405394
    Abandoned 2001-07-26
33. Eclipse Mine

    Underground metal/non-metal · Pfizer Inc · MSHA ID 0401098
    Abandoned 1985-05-21
34. Emperor Stockwell Mine

    Underground metal/non-metal · Nomad Mining & Milling Company · MSHA ID 0404710
    Abandoned 1989-05-01
35. Firestone Mill

    Facility metal/non-metal · Firestone Mining Industries Inc · MSHA ID 0403732
    Abandoned 1987-07-17
36. Frisco

    Surface metal/non-metal · Tonkin'S Hauling · MSHA ID 0401115
    Abandoned 1983-02-03
37. GERSTLEY MINE

    Underground metal/non-metal · U S Borax Inc · MSHA ID 0404953
    Abandoned 1997-01-13
38. GERSTLEY MINE

    Facility metal/non-metal · U S Borax Inc · MSHA ID 0405300
    Abandoned 1999-01-04
39. Goldbug Mine

    Underground metal/non-metal · Goldbug Mines Inc · MSHA ID 0404531
    Abandoned 1985-12-27
40. Grantham Mine

    Underground metal/non-metal · Pfizer Inc · MSHA ID 0402656
    Abandoned 1985-05-21
41. Grantham Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404625
    Abandoned 1985-05-21
42. Grey Eagle

    Underground metal/non-metal · Ibis · MSHA ID 0405620
    Abandoned 2004-11-14
43. Hiatt Sand & Gravel

    Surface metal/non-metal · Hiatt Sand & Gravel · MSHA ID 0401794
    Abandoned 1985-11-04
44. Hot Creek Mine

    Surface metal/non-metal · Standard Industrial Minerals Inc · MSHA ID 0404231
    Abandoned 2010-12-15
45. Jackass Mine

    Underground metal/non-metal · Delthe Resources Corp · MSHA ID 0404329
    Abandoned 1981-09-15
46. Keeler Mill

    Facility metal/non-metal · Cyprus Industrial Minerals Company · MSHA ID 0401124
    Abandoned 1980-06-03
47. Keystone Mine

    Underground metal/non-metal · Keystone Mining Company · MSHA ID 0404390
    Abandoned 1992-05-06
48. KIM-CRETE 1 & E

    Surface metal/non-metal · Big Gun Mining Company · MSHA ID 0404632
    Abandoned 1997-10-17
49. KIM-CRETE PUMICE MINE NO. 3&4

    Surface metal/non-metal · California Lightweight Pumice Inc · MSHA ID 0405332
    Abandoned 1998-07-01
50. Kurias Mine

    Surface metal/non-metal · Patchwork Corp · MSHA ID 0404928
    Abandoned 1989-01-26
51. Laws Mill

    Facility metal/non-metal · Standard Industrial Minerals Inc · MSHA ID 0402653
    Abandoned 2010-12-15
52. Lone Pine Pit & Mill

    Surface metal/non-metal · Lone Pine Sand & Gravel · MSHA ID 0402177
    Abandoned 1993-10-15
53. Mammoth Mine

    Underground metal/non-metal · Pfizer Inc · MSHA ID 0404265
    Abandoned 1981-04-16
54. Mile High Mine Group 7

    Surface metal/non-metal · Ed Kivett · MSHA ID 0403307
    Abandoned 1977-01-09
55. Modoc Group Mining Properties

    Underground metal/non-metal · Panamint Mining Co & Defense Resources Co · MSHA ID 0404519
    Abandoned 1983-08-10
56. Modoc Mine Open Pit

    Surface metal/non-metal · Panamint Mining Co & Defense Resources Co · MSHA ID 0404551
    Abandoned 1983-12-13
57. Mongolian Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404264
    Abandoned 1985-05-21
58. Montecito Mill

    Facility metal/non-metal · Montecito Mining Company · MSHA ID 0402871
    Abandoned 1978-12-01
59. National Cinder And Stone Pit And Mill

    Surface metal/non-metal · National Cinder & Stone Inc · MSHA ID 0403625
    Abandoned 1978-08-10
60. OLANCHA MILL

    Facility metal/non-metal · Big Pine Distributors · MSHA ID 0402620
    Abandoned 2011-07-01
61. Olancha White Pumice

    Surface metal/non-metal · Olancha White Pumice Products · MSHA ID 0405104
    Abandoned 1991-04-01
62. Owens Lake Gold

    Facility metal/non-metal · Keystone Mining Company · MSHA ID 0404737
    Abandoned 1991-11-21
63. Panamint Mine

    Surface metal/non-metal · Cyprus Mines Corp · MSHA ID 0401127
    Abandoned 1987-01-01
64. Partly Mine

    Surface metal/non-metal · Independence Mining Corp · MSHA ID 0404905
    Abandoned 1989-08-28
65. Pearl (1) Or (2) Mine

    Underground metal/non-metal · Ams Inc Of Nevada · MSHA ID 0404092
    Abandoned 1980-08-12
66. Pebbles

    Surface metal/non-metal · Inyo Marble Company · MSHA ID 0405012
    Abandoned 1990-08-03
67. PINE CREEK MILL

    Facility metal/non-metal · Avocet Tungsten Inc · MSHA ID 0404599
    Abandoned 2000-09-05
68. PORTABLE #1

    Surface metal/non-metal · Hodge Construction Company · MSHA ID 0405236
    Abandoned 1998-04-14
69. Portable Crusher #1

    Surface metal/non-metal · Barnard Construction Company Inc · MSHA ID 0405777
    Abandoned 2010-05-19
70. Portable plant B

    Surface metal/non-metal · Skanska USA Civil West California District, Inc. · MSHA ID 0405741
    Abandoned 2010-04-22
71. Radcliff Mine

    Underground metal/non-metal · Pruett Ballarat Inc · MSHA ID 0405839
    Abandoned 2016-12-20
72. Red Hill Quarry

    Surface metal/non-metal · Atlas Mineral Products Corp · MSHA ID 0405737
    Abandoned 2007-12-13
73. Reward-Brown Monster

    Underground metal/non-metal · International Recovery Inc · MSHA ID 0404558
    Abandoned 1984-06-14
74. Rex Montis Mine

    Underground metal/non-metal · Rex Montis Silver Company · MSHA ID 0404366
    Abandoned 1983-02-18
75. RICHMARK CANYON TALC INC.

    Surface metal/non-metal · Richmark Canyon Talc Inc · MSHA ID 0405327
    Abandoned 1999-03-15
76. Rogers Mine

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404610
    Abandoned 1985-05-21
77. Round Valley Mine

    Underground metal/non-metal · Inspiration Mines Inc · MSHA ID 0404581
    Abandoned 1982-12-29
78. Santa Barbara Portable

    Surface metal/non-metal · Granite Construction Company · MSHA ID 0405811
    Abandoned 2011-01-01
79. Sericite Pit

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0404343
    Abandoned 1985-05-21
80. Sidehill Mine

    Surface metal/non-metal · VM Buyer LLC · MSHA ID 0400581
    Abandoned 2015-11-25
81. Snow Cap Mine & Mill

    Facility metal/non-metal · Sunshine Mining Company · MSHA ID 0404871
    Abandoned 1991-07-11
82. Snowcap Mine

    Surface metal/non-metal · Lost Dutchman Construction Inc · MSHA ID 0404651
    Abandoned 1988-12-31
83. Superior

    Surface metal/non-metal · Pfizer Inc · MSHA ID 0401103
    Abandoned 1985-05-21
84. T-Rock

    Surface metal/non-metal · T-Rock Products Inc · MSHA ID 0405882
    Abandoned 2015-04-20
85. Thompson Mine

    Underground metal/non-metal · Montecito Mining Company · MSHA ID 0402522
    Abandoned 1978-12-01
86. Trinity Mine

    Underground metal/non-metal · Okuniewicz Mining Company · MSHA ID 0405109
    Abandoned 1991-05-10
87. Warm Springs Mine

    Surface metal/non-metal · Manville Products Corp · MSHA ID 0401077
    Abandoned 1979-01-01
88. Water Canyon

    Surface metal/non-metal · Tuma Corp · MSHA ID 0404532
    Abandoned 1982-02-08
89. White Eagle Mine

    Underground metal/non-metal · Ibis · MSHA ID 0401113
    Abandoned 1993-04-21
90. White Point

    Underground metal/non-metal · Pfizer Inc · MSHA ID 0404645
    Abandoned 1987-07-14
91. White Swan Mine

    Surface metal/non-metal · Elmar F Mancini · MSHA ID 0404541
    Abandoned 1983-02-03
92. Wyoming Mine

    Underground metal/non-metal · Mineop Corp · MSHA ID 0404512
    Abandoned 1985-04-29
93. Zodiac

    Surface metal/non-metal · Zodiac Investment Inc · MSHA ID 0404815
    Abandoned 1990-06-19

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

• San Bernardino County 14,976
• Kern County 4,879
• Riverside County 3,227
• Mono County 2,946
• Siskiyou County 2,362
• Imperial County 1,232
• Mariposa County 1,079
• Tuolumne County 948
• San Diego County 901
• Calaveras County 840
• Shasta County 832
• Trinity County 685

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.