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Abandoned mines › Wyoming
Abandoned mine inventory

Abandoned mines in Crook County, Wyoming

Crook County, Wyoming has 919 mine and prospect features on USGS topographic maps published 1954–1984, including 39 mine openings (shafts, adits and air shafts) and 310 prospect pits; 38 of the features carry a name on the map. OSMRE's abandoned mine land inventory lists 235 problems in the county, 23 of them not yet reclaimed. MSHA's register carries 35 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Crook 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)
919
Mine openings
39
OSMRE problems unreclaimed
23
MSHA mines marked abandoned
35
38 features carry a name310 prospect pits65 quadrangle maps, published 1954–1984 235 OSMRE problems, 212 reclaimed 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
    53 4.6%
  2. Prospect pits and trenches
    shallow exploration diggings that never became a mine
    310 26.9%
  3. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    33 2.9%
  4. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    533 46.2%
  5. Dumps, tailings, spoil and gob
    what mining left above ground
    82 7.1%
  6. Mills, tipples and facilities
    processing plants and hazardous structures
    3 0.3%
  7. Other reclamation problems
    highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
    137 11.9%
  8. Other
    symbols outside the classes above
    3 0.3%
Named features on the maps38 named · from the USGS compilation
Name on map Feature
Artic No 2 Mine Adit
Birdsnest Mine Adit
Bock Mine Adit
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Disturbed Area Clay Pit area
Eureka No 1 Mine Adit
Eureka No 2 Mine Adit
Homestake Mines Open Pit Mine
Inter Ocean Mine Mine Shaft
Mayhem Mine Adit
Peterson Mine Open Pit Mine
Treadwell Mine Open Pit Mine area
W.T. Mine Adit

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.

OSMRE abandoned mine land problems235 on inventory
Problem area Problem Status
12d Group 6 Sites 41,42,43 P1 Dangerous Piles & Embankments Reclamation Completed
12d Group 6 Sites 41,42,43 P1 Hazardous Water Bodies Reclamation Completed
12d Group 6 Sites 41,42,43 P2 Dangerous Highwalls Reclamation Completed
12d Group 6 Sites 41,42,43 P3 Spoil Area Reclamation Completed
12d Bentonite Site 12-22 P2 Hazardous Water Bodies Reclamation Completed
12d Bentonite Site 12-22 P3 Spoil Area Reclamation Completed
12d-construction Group 6, Site 14 P1 Dangerous Piles & Embankments Reclamation Completed
12d-construction Group 6, Site 14 P2 Dangerous Highwalls Reclamation Completed
12d-construction Group 6, Site 14 P3 Spoil Area Reclamation Completed
Aladdin Prospects (Tipple) CROK1078 P2 Hazardous Equip & Facilities Reclamation Completed
Aladdin Prospects (Tipple) CROK1078 P2 Hazardous Equip & Facilities Reclamation Completed
Aladdin Prospects (Tipple) CROK1078 P2 Portals Reclamation Completed
Aladdin Prospects (Tipple) CROK1078 P2 Vertical Openings Reclamation Completed
Anna No. 2 Fraction P2 Vertical Openings Reclamation Pending
Anna No. 2 Fraction P3 Spoil Area Reclamation Pending
Carbonate Claims P2 Portals In Reclamation
Carbonate Claims P2 Subsidence In Reclamation
Carbonate Claims P2 Vertical Openings In Reclamation
Carbonate Claims P3 Spoil Area In Reclamation
Crok0018 P2 Dangerous Highwalls Reclamation Pending
Crok0018 P3 Spoil Area Reclamation Pending
Crok0043 P2 Hazardous Water Bodies Reclamation Pending
Crok0043 P3 Pits Reclamation Pending
Crok0043 P3 Spoil Area Reclamation Pending
Crok0049 P2 Dangerous Highwalls Reclamation Pending
Crok0049 P2 Hazardous Water Bodies Reclamation Pending
Crok0049 P3 Pits Reclamation Pending
Crok0049 P3 Spoil Area Reclamation Pending
Crok1020 P2 Dangerous Highwalls Reclamation Completed
Crok1020 P2 Hazardous Water Bodies Reclamation Completed
Crok1020 P3 Spoil Area Reclamation Completed
Crok1091 P2 Dangerous Highwalls Reclamation Completed
Crok1091 P3 Pits Reclamation Completed
Crok1091 P3 Spoil Area Reclamation Completed
Crok1094 P2 Dangerous Highwalls Reclamation Completed
Crok1094 P3 Pits Reclamation Completed
Crok1094 P3 Spoil Area Reclamation Completed
Crok1095 P2 Dangerous Highwalls Reclamation Completed
Crok1095 P3 Pits Reclamation Completed
Crok1095 P3 Spoil Area Reclamation Completed
Crok1096 P2 Dangerous Highwalls Reclamation Completed
Crok1096 P3 Pits Reclamation Completed
Crok1096 P3 Spoil Area Reclamation Completed
Crok1097 P2 Dangerous Highwalls Reclamation Completed
Crok1097 P3 Pits Reclamation Completed
Crok1097 P3 Spoil Area Reclamation Completed
Crok1103 P3 Pits Reclamation Completed
Crok1103 P3 Spoil Area Reclamation Completed
Crok1110 P3 Pits Reclamation Completed
Crok1110 P3 Spoil Area Reclamation Completed
Crok1117 P2 Clogged Streams Reclamation Completed
Crok1117 P2 Dangerous Highwalls Reclamation Completed
Crok1117 P3 Pits Reclamation Completed
Crok1117 P3 Spoil Area Reclamation Completed
Crok1135 P2 Dangerous Highwalls Reclamation Completed
Crok1135 P3 Pits Reclamation Completed
Crok1135 P3 Spoil Area Reclamation Completed
Crok1136 P2 Dangerous Highwalls Reclamation Completed
Crok1136 P3 Pits Reclamation Completed
Crok1136 P3 Spoil Area Reclamation Completed
Crok1137 P3 Pits Reclamation Completed
Crok1137 P3 Spoil Area Reclamation Completed
Crok1138 P2 Dangerous Highwalls Reclamation Completed
Crok1138 P3 Pits Reclamation Completed
Crok1138 P3 Spoil Area Reclamation Completed
Crok1139 P2 Dangerous Highwalls Reclamation Completed
Crok1139 P3 Pits Reclamation Completed
Crok1139 P3 Spoil Area Reclamation Completed
Crok1140 P3 Pits Reclamation Completed
Crok1140 P3 Spoil Area Reclamation Completed
Crok1142 P3 Pits Reclamation Completed
Crok1142 P3 Spoil Area Reclamation Completed
Crok1143 P3 Pits Reclamation Completed
Crok1143 P3 Spoil Area Reclamation Completed
Crok1144 P3 Pits Reclamation Completed
Crok1144 P3 Spoil Area Reclamation Completed
Crok1146 P2 Dangerous Highwalls Reclamation Completed
Crok1146 P3 Pits Reclamation Completed
Crok1146 P3 Spoil Area Reclamation Completed
Crok1147 P2 Dangerous Highwalls Reclamation Completed
Crok1147 P3 Pits Reclamation Completed
Crok1147 P3 Spoil Area Reclamation Completed
Crok1150 P2 Dangerous Highwalls Reclamation Completed
Crok1150 P3 Pits Reclamation Completed
Crok1150 P3 Spoil Area Reclamation Completed
Crok1164 P3 Pits Reclamation Completed
Crok1164 P3 Spoil Area Reclamation Completed
Crok1175 P2 Dangerous Highwalls Reclamation Completed
Crok1175 P3 Pits Reclamation Completed
Crok1175 P3 Spoil Area Reclamation Completed
Crok1176 P2 Dangerous Highwalls Reclamation Completed
Crok1176 P3 Pits Reclamation Completed
Crok1176 P3 Spoil Area Reclamation Completed
Crok1179 P2 Dangerous Highwalls Reclamation Completed
Crok1179 P3 Pits Reclamation Completed
Crok1179 P3 Spoil Area Reclamation Completed
Crok1181 P3 Pits Reclamation Completed
Crok1181 P3 Spoil Area Reclamation Completed
Crok1183 P3 Pits Reclamation Completed
Crok1183 P3 Spoil Area Reclamation Completed
Crok1192 P3 Pits Reclamation Completed
Crok1192 P3 Spoil Area Reclamation Completed
Crok1193 P2 Clogged Stream Lands Reclamation Completed
Crok1193 P2 Clogged Streams Reclamation Completed
Crok1193 P2 Dangerous Highwalls Reclamation Completed
Crok1193 P2 Dangerous Slides Reclamation Completed
Crok1193 P2 Hazardous Equip & Facilities Reclamation Completed
Crok1193 P2 Hazardous Water Bodies Reclamation Completed
Crok1193 P2 Industrial/Residential Waste Reclamation Completed
Crok1193 P3 Gobs Reclamation Completed
Crok1193 P3 Haul Road Reclamation Completed
Crok1193 P3 Pits Reclamation Completed
Crok1193 P3 Spoil Area Reclamation Completed
Crok1194 P2 Dangerous Highwalls Reclamation Completed
Crok1194 P3 Pits Reclamation Completed
Crok1194 P3 Spoil Area Reclamation Completed
Crok1195 P3 Pits Reclamation Completed
Crok1195 P3 Spoil Area Reclamation Completed
Crok1206 P3 Pits Reclamation Completed
Crok1206 P3 Spoil Area Reclamation Completed
Crok1208 P2 Dangerous Highwalls Reclamation Completed
Crok1208 P3 Pits Reclamation Completed
Crok1208 P3 Spoil Area Reclamation Completed
Crok1221 P3 Pits Reclamation Completed
Crok1221 P3 Spoil Area Reclamation Completed
Crok1222 P2 Dangerous Highwalls Reclamation Completed
Crok1222 P2 Hazardous Water Bodies Reclamation Completed
Crok1222 P3 Pits Reclamation Completed
Crok1222 P3 Spoil Area Reclamation Completed
Crok1225 P2 Dangerous Highwalls Reclamation Completed
Crok1225 P3 Pits Reclamation Completed
Crok1225 P3 Spoil Area Reclamation Completed
Crok1226 P2 Dangerous Highwalls Reclamation Completed
Crok1226 P2 Hazardous Water Bodies Reclamation Completed
Crok1226 P3 Pits Reclamation Completed
Crok1226 P3 Spoil Area Reclamation Completed
Crok1227 P2 Dangerous Highwalls Reclamation Completed
Crok1227 P3 Pits Reclamation Completed
Crok1227 P3 Spoil Area Reclamation Completed
Crok1229 P3 Pits Reclamation Completed
Crok1229 P3 Spoil Area Reclamation Completed
Crok1231 P2 Dangerous Highwalls Reclamation Completed
Crok1231 P3 Pits Reclamation Completed
Crok1231 P3 Spoil Area Reclamation Completed
Crok1232 P2 Dangerous Highwalls Reclamation Completed
Crok1232 P3 Pits Reclamation Completed
Crok1232 P3 Spoil Area Reclamation Completed
Crok1234 P2 Dangerous Highwalls Reclamation Completed
Crok1234 P3 Pits Reclamation Completed
Crok1234 P3 Spoil Area Reclamation Completed

…and 85 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.

MSHA-registered mines with status Abandoned35 on register
  1. American Colloid Pits
    Surface metal/non-metal · American Colloid Company Minerals Group · MSHA ID 4800961
    Abandoned
  2. Bruce Nygaard Plant
    Surface metal/non-metal · Fisher Sand & Gravel Company · MSHA ID 4801304
    Abandoned
  3. Burke & Roe Pit
    Surface metal/non-metal · Federal Bentonite Div/Aurora Metal Company · MSHA ID 4800618
    Abandoned
  4. Cedar Mine
    Surface metal/non-metal · International Minerals & Chemical Corp · MSHA ID 4800814
    Abandoned
  5. Crusher
    Surface metal/non-metal · Crook County · MSHA ID 4801458
    Abandoned
  6. Driskell Pit
    Surface metal/non-metal · Gilpatrick Construction Company Inc · MSHA ID 4801239
    Abandoned
  7. Hunter Quarry
    Surface metal/non-metal · Pete Lien & Sons Inc · MSHA ID 4801705
    Abandoned
  8. Jaw Crusher
    Surface metal/non-metal · Earth Work Solutions (WY) · MSHA ID 4801740
    Abandoned
  9. Lake Ranch
    Surface metal/non-metal · Earth Work Solutions (WY) · MSHA ID 4801793
    Abandoned
  10. Mineral Hill Mine And Mill
    Underground metal/non-metal · Hoffman Engineering Corp · MSHA ID 4801322
    Abandoned
  11. Missouri Mine
    Surface metal/non-metal · Federal Ore & Chemicals Inc · MSHA ID 4801125
    Abandoned
  12. Nubeth Joint Venture In-Situ Uranium Min
    Underground metal/non-metal · Nuclear Dynamics Inc · MSHA ID 4801228
    Abandoned
  13. P Q 1643
    Surface metal/non-metal · Hills Materials Company · MSHA ID 4801420
    Abandoned
  14. PORTABLE #1
    Surface metal/non-metal · N A Corp · MSHA ID 4801533
    Abandoned
  15. PORTABLE #2
    Surface metal/non-metal · N A Corp · MSHA ID 4801552
    Abandoned
  16. PORTABLE #3
    Surface metal/non-metal · N A Corp · MSHA ID 4801554
    Abandoned
  17. QAC #3
    Surface metal/non-metal · Quality Agg & Construction, Inc · MSHA ID 4801747
    Abandoned
  18. QAC #5
    Surface metal/non-metal · Quality Agg & Construction Inc · MSHA ID 4801785
    Abandoned
  19. RC19041
    Surface metal/non-metal · Basic Energy Services LP · MSHA ID 4801716
    Abandoned
  20. Ruby Pit
    Surface metal/non-metal · Don Lampert · MSHA ID 4801339
    Abandoned
  21. Sand & Gravel Operation
    Surface metal/non-metal · Roberts Construction Company · MSHA ID 4800313
    Abandoned
  22. Schundler Mine
    Surface metal/non-metal · N L Baroid-Div/N L Industries Inc · MSHA ID 4800899
    Abandoned
  23. Screen #3
    Surface metal/non-metal · Dan Hart Patrol Service LLC · MSHA ID 4801687
    Abandoned
  24. Simmon Stockpile
    Surface metal/non-metal · Delzer Construction Company Inc · MSHA ID 4801168
    Abandoned
  25. State Pit
    Surface metal/non-metal · Delzer Construction Company Inc · MSHA ID 4801139
    Abandoned
  26. SUNDANCE PIT
    Surface metal/non-metal · Croell Redi-Mix Inc · MSHA ID 4801537
    Abandoned
  27. Sundance Quarry
    Surface metal/non-metal · Summit Materials Inc · MSHA ID 4800011
    Abandoned
  28. Sunset No 17 Pit
    Surface metal/non-metal · Federal Bentonite Div/Aurora Metal Company · MSHA ID 4800813
    Abandoned
  29. Triple Creek Ranches
    Surface metal/non-metal · Al Falzerano · MSHA ID 4801396
    Abandoned
  30. UNIT # 45
    Surface metal/non-metal · Basic Energy Services, L.P. · MSHA ID 4801562
    Abandoned
  31. UNIT 45-A
    Surface metal/non-metal · Basic Energy Services, L.P. · MSHA ID 4801596
    Abandoned
  32. VONDRISKA PIT, SUNDANCE
    Surface metal/non-metal · Pete Lien & Sons Inc · MSHA ID 4801534
    Abandoned
  33. Watson Pit
    Surface metal/non-metal · Reeves Inc · MSHA ID 4801110
    Abandoned
  34. Willow Creek R R D Project
    Surface metal/non-metal · Malapai Resources Company · MSHA ID 4801449
    Abandoned
  35. Wimco Mine
    Surface metal/non-metal · Applied Industrial Materials Corp (Aimcor) · MSHA ID 4800816
    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 310
Clay Pit 304
P3 Spoil Area 75
Gravel Pit 62
P3 Pits 58
Bentonite Pit 55
Clay Pit 46
P2 Dangerous Highwalls 45
Gravel Pit 34
Adit 22
Uranium Mine 22
Mine Shaft 17
P2 Hazardous Water Bodies 15
P2 Vertical Openings 10
Quarry 9
Gravel/Borrow Pit - Undifferentiated 8
Shale Pit 7
P2 Clogged Streams 6
Bentonite Pit 5
P2 Dangerous Impoundments 5
Tailings - Pond 4
P2 Portals 4
Open Pit Mine 4
Uranium Mine 3
Open Pit Mine 3
P2 Hazardous Equip & Facilities 3
PF Public Utilities 2
P1 Dangerous Piles & Embankments 2
Shale Pit 2
Gravel/Borrow Pit - Undifferentiated 1
P1 Dangerous Impoundments 1
P2 Industrial/Residential Waste 1
P3 Gobs 1
P1 Hazardous Water Bodies 1
P2 Dangerous Slides 1
P2 Subsidence 1
P3 Mine Opening 1
P3 Haul Road 1
Open Pit Mine or Quarry 1
PF Roads 1
P2 Clogged Stream Lands 1
Other counties in WyomingAll 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.