Abandoned mines in Fremont County, Wyoming

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   345 11.8%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   1,945 66.4%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   95 3.2%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   172 5.9%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   193 6.6%
6. Mills, tipples and facilities

   processing plants and hazardous structures
   17 0.6%
7. Other reclamation problems

   highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
   154 5.3%
8. Other

   symbols outside the classes above
   8 0.3%

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.

…and 381 more problems not listed here.

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.

1. 3 Ms West Inc Blue Spar No 2 Pit

   Surface metal/non-metal · Modern Mining & Milling Inc · MSHA ID 4800591
   Abandoned 1980-03-19
2. A J PIT

   Surface metal/non-metal · Albright Sand & Gravel Inc · MSHA ID 4801264
   Abandoned 2025-06-27
3. Airport Pit

   Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4800276
   Abandoned 1983-07-14
4. Atlantic City Ore Operations And Plant

   Surface metal/non-metal · United States Steel Corp · MSHA ID 4800145
   Abandoned 1984-04-26
5. Atlantic City Screen

   Surface metal/non-metal · Rice-Kilroy Construction Company Inc. · MSHA ID 4801621
   Abandoned 2004-01-21
6. Bia Pit

   Surface metal/non-metal · Empire Sand & Gravel Company Inc · MSHA ID 4801323
   Abandoned 1981-05-04
7. Big Eagle Mine

   Underground metal/non-metal · Green Mountain Mining Venture · MSHA ID 4801144
   Abandoned 1991-10-16
8. Big Eagle Underground Mine

   Underground metal/non-metal · Pathfinder Mines Corp · MSHA ID 4801330
   Abandoned 1983-01-07
9. Bison Basin Decommissioning Project

   Facility metal/non-metal · Altair Resources Inc · MSHA ID 4801315
   Abandoned 1988-09-29
10. Booneville Feldspar Mill

    Facility metal/non-metal · Concepts West Inc · MSHA ID 4800592
    Abandoned 1983-07-12
11. Brown Pit

    Surface metal/non-metal · R J Studer & Sons · MSHA ID 4801347
    Abandoned 1982-10-22
12. Carissa Gold Mines

    Underground metal/non-metal · Carissa Gold Inc · MSHA ID 4801453
    Abandoned 1988-06-06
13. Carissa Mine

    Underground metal/non-metal · Carissa Mining Corp · MSHA ID 4801524
    Abandoned 1994-08-17
14. Circle Paving, Inc - Crusher #2

    Surface metal/non-metal · CIRCLE PAVING INC. · MSHA ID 4801608
    Abandoned 2004-04-28
15. Clapp Pit

    Surface metal/non-metal · Clay Construction Company Inc · MSHA ID 4801360
    Abandoned 1985-04-30
16. Clyde Underground

    Underground metal/non-metal · Federal American Partners · MSHA ID 4801211
    Abandoned 1980-08-01
17. Countryman Pit

    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801213
    Abandoned 1979-02-13
18. Crusher #1

    Surface metal/non-metal · Campbell Grading Inc · MSHA ID 4801382
    Abandoned 1986-07-03
19. Crusher #81

    Surface metal/non-metal · Star Trucking · MSHA ID 4801728
    Abandoned 2014-12-15
20. CRUSHER NO 1-35

    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801297
    Abandoned 1999-05-05
21. Crusher No 2

    Surface metal/non-metal · Brasel & Sims Construction Company · MSHA ID 4801327
    Abandoned 1983-03-23
22. Day Loma Mine

    Surface metal/non-metal · Energy Fuels Nuclear Inc · MSHA ID 4800497
    Abandoned 1983-03-21
23. Doyle #1

    Surface metal/non-metal · Archer Construction, Inc · MSHA ID 4801749
    Abandoned 2013-02-04
24. East Area Pit

    Surface metal/non-metal · Union Carbide Corp · MSHA ID 4800994
    Abandoned 1980-01-03
25. Federal American Partners Open Pit

    Surface metal/non-metal · Federal American Partners · MSHA ID 4801177
    Abandoned 1983-12-02
26. Federal-American Partners Mill

    Facility metal/non-metal · Federal American Partners · MSHA ID 4800381
    Abandoned 1983-05-17
27. Federal-American Partners Underground Mi

    Underground metal/non-metal · Federal American Partners · MSHA ID 4801179
    Abandoned 1982-12-16
28. Four Corners Underground Operations

    Underground metal/non-metal · Pathfinder Mines Corp · MSHA ID 4801378
    Abandoned 1987-12-30
29. Fremont Jade Quarry And Plant

    Surface metal/non-metal · Fremont Jade · MSHA ID 4801053
    Abandoned 1979-10-11
30. Gas Hills Mine

    Surface metal/non-metal · Umetco Minerals Corp · MSHA ID 4800862
    Abandoned 1986-11-26
31. Golden Buffalo

    Surface metal/non-metal · Golden Buffalo Mining · MSHA ID 4801836
    Abandoned 2025-06-27
32. Graham Ranch Pit

    Surface metal/non-metal · Brasel & Sims Construction Company · MSHA ID 4801162
    Abandoned 1979-04-16
33. Hawn Mine

    Surface metal/non-metal · William Brush & Sons Inc · MSHA ID 4801377
    Abandoned 1987-07-10
34. Iron Duke

    Underground metal/non-metal · TommyKnockers LLC · MSHA ID 4801821
    Abandoned 2020-06-01
35. J B Frost Pit

    Surface metal/non-metal · R J Studer & Sons · MSHA ID 4801137
    Abandoned 1982-10-22
36. JACKPOT MINE

    Underground metal/non-metal · Green Mountain Mining Venture · MSHA ID 4801478
    Abandoned 2001-07-30
37. Kolberg 130-50

    Surface metal/non-metal · Dick Stock Contracting · MSHA ID 4801739
    Abandoned 2010-08-06
38. Lander Pit

    Surface metal/non-metal · Peter Kiewit Sons' Company · MSHA ID 4801398
    Abandoned 1984-02-28
39. Lucky Mc 7b Underground

    Underground metal/non-metal · Pathfinder Mines Corp · MSHA ID 4800855
    Abandoned 1988-04-11
40. Lucky Mc Mill Operations

    Facility metal/non-metal · Pathfinder Mines Corp · MSHA ID 4800861
    Abandoned 1988-07-27
41. Lucky Mc Mine Maintenance

    Surface metal/non-metal · Pathfinder Mines Corp · MSHA ID 4801391
    Abandoned 1988-07-27
42. Lucky Mc Mine Operations

    Surface metal/non-metal · Pathfinder Mines Corp · MSHA ID 4800557
    Abandoned 1988-07-27
43. Mc Garvin-Moberly Construction Company

    Surface metal/non-metal · Mc Garvin-Moberly Construction Company · MSHA ID 4801184
    Abandoned 1982-12-16
44. Mc Intosh Pit

    Surface metal/non-metal · Western Nuclear Inc · MSHA ID 4801070
    Abandoned 1982-07-19
45. Midvale Irrigation Pit

    Surface metal/non-metal · Frost Construction Company · MSHA ID 4801156
    Abandoned 1983-07-12
46. Milford Pit

    Surface metal/non-metal · Empire Sand & Gravel Company Inc · MSHA ID 4801164
    Abandoned 1983-08-10
47. Muddy Creek Mine

    Surface coal · Muddy Creek Mines Inc · MSHA ID 4801381
    Abandoned 1983-05-01
48. Muddy Creek Strip

    Surface coal · Muddy Creek Coal Company · MSHA ID 4800844
    Abandoned 1978-07-25
49. Pay Dirt North Incline

    Underground metal/non-metal · U S Energy Corp · MSHA ID 4801174
    Abandoned 1979-04-04
50. Plume Pit

    Surface metal/non-metal · Empire Sand & Gravel Company Inc · MSHA ID 4801362
    Abandoned 1983-01-03
51. Portable / Variable

    Surface metal/non-metal · Western Wyoming Construction Co · MSHA ID 4801326
    Abandoned 2014-10-01
52. Portable/Variable #2

    Surface metal/non-metal · Synapse Inc. · MSHA ID 4801742
    Abandoned 2019-09-30
53. Quien Sabe Mine

    Underground metal/non-metal · Copper Mountain Energy Inc · MSHA ID 4800718
    Abandoned 1980-12-03
54. Riverton Acid Plant

    Facility metal/non-metal · Western Nuclear Inc · MSHA ID 4801040
    Abandoned 1982-05-21
55. Riverton Pit

    Surface metal/non-metal · Moberly Asphalt Maintenance Inc · MSHA ID 4801050
    Abandoned 1983-03-23
56. ROCK CREEK GRAVEL

    Surface metal/non-metal · BRODIE EXCAVATION LLC · MSHA ID 4801916
    Abandoned 2026-07-01
57. Rock Creek Group

    Surface metal/non-metal · RC Mineral & Rock LLC · MSHA ID 4801819
    Abandoned 2020-06-01
58. Rock Creek Placer

    Surface metal/non-metal · Oro Management LLC · MSHA ID 4801606
    Abandoned 2003-01-22
59. Ruby Pit

    Surface metal/non-metal · Sinks Canyon Inc · MSHA ID 4801380
    Abandoned 2004-08-11
60. Sheep Mountain Mine

    Underground metal/non-metal · Energy Fuels Wyoming Inc · MSHA ID 4800969
    Abandoned 2001-07-30
61. Table Stakes No 2

    Underground metal/non-metal · Federal American Partners · MSHA ID 4800504
    Abandoned 1978-09-13
62. Training School Pit

    Surface metal/non-metal · Big Valley View Development Company Inc · MSHA ID 4800520
    Abandoned 1982-10-25
63. Triangle C Pit

    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801279
    Abandoned 1979-08-13
64. Umetco Minerals Corp Black Rock Quarry

    Surface metal/non-metal · Umetco Minerals Corp · MSHA ID 4801506
    Abandoned 1994-08-22
65. Umetco Minerals Corp Dutton Limestone Qu

    Surface metal/non-metal · Umetco Minerals Corp · MSHA ID 4801519
    Abandoned 1994-08-22
66. Western Nuclear Inc Golden Goose No

    Underground metal/non-metal · U S Energy Corp · MSHA ID 4800551
    Abandoned 1978-10-10
67. Whitlock Concrete

    Surface metal/non-metal · Whitlock Concrete · MSHA ID 4801345
    Abandoned 1986-06-15
68. WIND RIVER PIT CRUSHER #1

    Surface metal/non-metal · W R R M Inc · MSHA ID 4801501
    Abandoned 2001-05-05
69. WindMill , LLC

    Surface metal/non-metal · WindMill , LLC · MSHA ID 4801737
    Abandoned 2009-08-25

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

• Crook County 919
• Carbon County 713
• Sweetwater County 691
• Albany County 428
• Big Horn County 427
• Johnson County 254
• Natrona County 231
• Lincoln County 212
• Converse County 198
• Park County 179
• Campbell County 179
• Laramie County 165

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.