Abandoned mine inventory
Abandoned mines in Las Animas County, Colorado
Las Animas County, Colorado has 535 mine and prospect features on USGS topographic maps published 1951–1984, including 264 mine openings (shafts, adits and air shafts) and 159 prospect pits; 73 of the features carry a name on the map. OSMRE's abandoned mine land inventory lists 233 problems in the county, 166 of them not yet reclaimed. MSHA's register carries 43 mines in the county with status Abandoned or Abandoned and Sealed.
Every mine and prospect feature the USGS digitized from historical topographic maps covering Las Animas 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)
- 535
- Mine openings
- 264
- OSMRE problems unreclaimed
- 166
- MSHA mines marked abandoned
- 43
73 features carry a name159 prospect pits43 quadrangle maps, published 1951–1984
233 OSMRE problems, 67 reclaimed
8 MSHA mines abandoned and sealed
What the features are
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363 47.3%Mine openingsshafts, adits, air shafts, portals and vertical openings: the ways into underground workings
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159 20.7%Prospect pits and trenchesshallow exploration diggings that never became a mine
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4 0.5%Mines and surface workingslabelled mines, open pits, strip mines, placer and hydraulic workings
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78 10.2%Quarries, gravel and borrow pitsconstruction-material and industrial-mineral extraction
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114 14.8%Dumps, tailings, spoil and gobwhat mining left above ground
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1 0.1%Mills, tipples and facilitiesprocessing plants and hazardous structures
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49 6.4%Other reclamation problemshighwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
Named features on the maps73 named · from the USGS compilation
| Name on map | Feature |
|---|---|
| Allen Mine | Adit |
| Allen Mine (West Portal) | Adit |
| Baldy Coal Mine | Adit |
| Bear Canyon Mine | Adit |
| Berwind Mines | Adit |
| Boncarbo Mine | Adit |
| Cornell Mine | Prospect Pit |
| Crystal Mine | Adit |
| Daisy Mine | Adit |
| Dicks Mine | Adit |
| Dicks Mine | Mine Dump area |
| East Cokedale Mine | Adit |
| Engleville Mine | Adit |
| Eureka Mine | Adit |
| Eureka Mine | Mine Dump area |
| Fairview Mine | Prospect Pit |
| Frederick Mine | Adit |
| Frederick Mine | Adit |
| Frederick Mine | Adit |
| Frederick Mine | Adit |
| Frederick Mine Airshaft | Air Shaft |
| Frederick Mine Airshaft | Air Shaft |
| Frederick Mine Shaft | Mine Shaft |
| Gem Mine | Adit |
| Henderson Mine | Adit |
| Highline Mine | Adit |
| Jacks Mine | Adit |
| Jeffryes Mine | Adit |
| Jeffryes Mine | Adit |
| Joger Mine | Adit |
| Klag Mine | Prospect Pit |
| La Belle Mine | Adit |
| Leone Mine | Adit |
| Main Cokedale Mine | Adit |
| Majestic Mine | Adit |
| Maraski Mine | Adit |
| Martinez Mine | Adit |
| McLaughlin Mine | Adit |
| McPherson Mine | Prospect Pit |
| Moore Mine | Adit |
| Morley Mine | Adit |
| New La Belle Mine | Adit |
| Peacock Coal Mine | Adit |
| Piedmont Mine | Adit |
| Pricco Mine | Adit |
| Primero Mine North | Adit |
| Primero Mine North | Mine Dump area |
| Primero Mine South | Adit |
| Primero Mine West | Adit |
| Prosperity Mine No 2 | Adit |
| Quatro Mine | Prospect Pit |
| Quinto Mine | Adit |
| Ramey Mines | Adit |
| Rapson Mine | Adit |
| Royal Mine | Mine Shaft |
| Sanchez Mine | Adit |
| Second Cokedale Mine | Adit |
| Second Cokedale Mine | Mine Dump area |
| Slack Piles | Mine Dump area |
| Slack Piles | Mine Dump area |
| Sopris Mine | Adit |
| Southwestern Mine | Adit |
| Stanley Mine | Adit |
| Starkville Mine | Adit |
| Starkville Mines | Adit |
| Starkville No 1 Coal Mine | Adit |
| Stevens Mine | Adit |
| Tercio Mine | Adit |
| Valley Mine | Adit |
| Vega Mine | Adit |
| Viola Mine | Adit |
| Viola Mine | Adit |
| Williams 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 problems233 on inventory
| Problem area | Problem | Status |
|---|---|---|
| 39/07-01 - Unknown - Noi | P2 Subsidence | Reclamation Completed |
| Abercrombie/henderson - 45/10-02 | P2 Portals | In Reclamation |
| Abercrombie/henderson - 45/10-02 | P2 Vertical Openings | Reclamation Completed |
| Abercrombie/henderson - 45/10-02 | P3 Gobs | Reclamation Pending |
| Aguilar - 30/37-01 | P3 Gobs | Reclamation Pending |
| Aguilar - 30/37-01 | P3 Mine Opening | Reclamation Pending |
| Aguilar-imperial - 32/36-01 | P2 Portals | Reclamation Pending |
| Aguilar-imperial - 32/36-01 | P2 Vertical Openings | Reclamation Pending |
| Aguilar-imperial - 32/36-01 | P3 Gobs | Reclamation Pending |
| Aguilar/black Diamnd 1&2 - 32/37-01 | P2 Portals | Reclamation Pending |
| Aguilar/black Diamnd 1&2 - 32/37-01 | P3 Gobs | Reclamation Pending |
| Allen/new Elk - 03/12-01 - Noi | P1 Vertical Openings | Reclamation Completed |
| Allen/new Elk - 03/12-01 - Noi | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Allen/new Elk - 03/12-01 - Noi | P3 Gobs | Reclamation Pending |
| Baldy Mtn Mine No. 1-2 - 42/21-01 | P2 Portals | Reclamation Pending |
| Baldy Mtn Mine No. 1-2 - 42/21-01 | P3 Gobs | Reclamation Pending |
| Bear Canyon/valloroso - 31/26-01 | P2 Portals | In Reclamation |
| Bear Canyon/valloroso - 31/26-01 | P2 Subsidence | Reclamation Pending |
| Bear Canyon/valloroso - 31/26-01 | P2 Vertical Openings | Reclamation Completed |
| Bear Canyon/valloroso - 31/26-01 | P3 Gobs | Reclamation Pending |
| Berwind Canyon Mine - 34/28-01 | P2 Portals | In Reclamation |
| Berwind Canyon Mine - 34/28-01 | P2 Subsidence | Reclamation Completed |
| Berwind Canyon Mine - 34/28-01 | P3 Gobs | Reclamation Pending |
| Black Diamond - 27/47-01 - Noi | P1 Portals | In Reclamation |
| Black Diamond - 27/47-01 - Noi | P1 Vertical Openings | Reclamation Completed |
| Black Diamond - 27/47-01 - Noi | P3 Gobs | Reclamation Pending |
| Bon Carbo - Not In Orig Inv | P2 Vertical Openings | Reclamation Completed |
| Bon Carbo - Not In Orig Inv | P3 Gobs | Reclamation Pending |
| Bon Carbo - Not In Orig Inv | P3 Mine Opening | Reclamation Pending |
| Bowen Mine/banner No. 1 - 43/22-01 | P2 Portals | Reclamation Completed |
| Bowen Mine/banner No. 1 - 43/22-01 | P3 Gobs | Reclamation Pending |
| Broadhead 1,3,4 - 28/41-01 | P2 Portals | In Reclamation |
| Broadhead 1,3,4 - 28/41-01 | P3 Gobs | Reclamation Pending |
| Broadhead No. 9 - 28/42-02 | P1 Vertical Openings | Reclamation Completed |
| Broadhead No. 9 - 28/42-02 | P2 Portals | Reclamation Pending |
| Broadhead No. 9 - 28/42-02 | P3 Gobs | Reclamation Pending |
| Broadhead No. 9 Site - 29/42-01 | P2 Portals | In Reclamation |
| Broadhead No. 9 Site - 29/42-01 | P2 Subsidence | Reclamation Completed |
| Broadhead No. 9 Site - 29/42-01 | P3 Gobs | Reclamation Pending |
| Butler - 44/10-02 | P1 Portals | In Reclamation |
| Butler - 44/10-02 | P1 Vertical Openings | Reclamation Completed |
| Butler - 44/10-02 | P3 Gobs | Reclamation Pending |
| Co - Las Animas - Fea | P1 Subsidence | Reclamation Completed |
| Colorado Canon/bueno - 39/14-01 | P2 Portals | In Reclamation |
| Colorado Canon/bueno - 39/14-01 | P3 Gobs | Reclamation Pending |
| Colorado Mine/wellington - 27/46-01 | P1 Portals | In Reclamation |
| Colorado Mine/wellington - 27/46-01 | P1 Subsidence | Reclamation Completed |
| Colorado Mine/wellington - 27/46-01 | P1 Vertical Openings | Reclamation Completed |
| Colorado Mine/wellington - 27/46-01 | P3 Gobs | Reclamation Pending |
| Daisy Mine No. 1 & No. 2 - 27/37-01 | P2 Portals | Reclamation Pending |
| Delagua 3 1/2, 4/cass - 29/32-01 | P2 Portals | Reclamation Completed |
| Delagua 3 1/2, 4/cass - 29/32-01 | P2 Vertical Openings | Reclamation Completed |
| Delagua 3 1/2, 4/cass - 29/32-01 | P3 Gobs | Reclamation Pending |
| Delagua 3 1/2, 4/cass - 29/32-01 | P3 Mine Opening | Reclamation Pending |
| East Cokedale Mine - 34/10-01 | P2 Portals | Reclamation Pending |
| East Cokedale Mine - 34/10-01 | P3 Gobs | Reclamation Pending |
| Engleville - 46/10-01 | P2 Portals | In Reclamation |
| Engleville - 46/10-01 | P2 Subsidence | Reclamation Completed |
| Engleville - 46/10-01 | P3 Gobs | Reclamation Pending |
| Engleville #2 - 46/10-02 | P2 Portals | In Reclamation |
| Engleville #2 - 46/10-02 | P2 Subsidence | Reclamation Completed |
| Fisher's Peak - 46/09-01 | P2 Portals | In Reclamation |
| Flagg Mine - 42/19-01 | P3 Gobs | Reclamation Pending |
| Flagg Mine - 42/19-01 | P3 Mine Opening | Reclamation Pending |
| Francisco - 40/09-01 | P3 Gobs | Reclamation Pending |
| Francisco - 40/09-01 | P3 Mine Opening | Reclamation Pending |
| Fred North Air Shaft - 28/05-02 | P2 Vertical Openings | Reclamation Completed |
| Frederick Air Shaft | P2 Vertical Openings | In Reclamation |
| Frederick Manway - Not In Orig Inv | P3 Mine Opening | Reclamation Pending |
| Frederick Mine - 26/08-01 | P2 Portals | Reclamation Completed |
| Frederick Mine - 26/08-01 | P2 Subsidence | Reclamation Completed |
| Frederick Mine - 26/08-01 | P3 Gobs | In Reclamation |
| Frederick Mine @ Tijeras - 29/08-01 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Frederick Mine @ Tijeras - 29/08-01 | P3 Gobs | Reclamation Completed |
| Frederick Pump | P2 Portals | In Reclamation |
| Frederick Pump - 28/05-01 | P2 Portals | Reclamation Completed |
| Frederick Pump - 28/05-01 | P3 Gobs | Reclamation Pending |
| Gem And Peerless Mines - 29/38-01 | P1 Portals | Reclamation Completed |
| Gem And Peerless Mines - 29/38-01 | P2 Portals | Reclamation Pending |
| Gem And Peerless Mines - 29/38-01 | P3 Gobs | Reclamation Pending |
| Green Canyon Nos. 5,6,7 - 27/42-01 | P1 Portals | Reclamation Completed |
| Green Canyon Nos. 5,6,7 - 27/42-01 | P2 Portals | In Reclamation |
| Green Canyon Nos. 5,6,7 - 27/42-01 | P2 Subsidence | Reclamation Pending |
| Harnish Nos. 1 & 2 - 26/35-01 | P1 Portals | Reclamation Completed |
| Harnish Nos. 1 & 2 - 26/35-01 | P1 Subsidence | Reclamation Completed |
| Harnish Nos. 1 & 2 - 26/35-01 | P1 Vertical Openings | Reclamation Completed |
| Harnish Nos. 1 & 2 - 26/35-01 | P2 Portals | Reclamation Pending |
| Harnish Nos. 1 & 2 - 26/35-01 | P3 Gobs | Reclamation Pending |
| Hastings No. 5 - 33/31-01 | P2 Portals | In Reclamation |
| Hastings No. 5 - 33/31-01 | P3 Gobs | Reclamation Pending |
| Henderson - 44/09-02 | P2 Portals | Reclamation Completed |
| Henderson - 44/09-02 | P2 Subsidence | Reclamation Completed |
| Henderson - 44/09-02 | P3 Gobs | Reclamation Pending |
| Highline - 47/11-01 | P2 Portals | Reclamation Pending |
| Highline - 47/11-01 | P3 Gobs | Reclamation Pending |
| Hines And Bloom's - 45/10-01 | P2 Portals | Reclamation Pending |
| Hines And Bloom's - 45/10-01 | P3 Gobs | Reclamation Pending |
| Hollingsworth - 43/21-01 - Noi | P1 Portals | Reclamation Completed |
| Hollingsworth - 43/21-01 - Noi | P3 Gobs | Reclamation Pending |
| Hubbard And Williams - 44/10-01 | P1 Portals | In Reclamation |
| Hubbard And Williams - 44/10-01 | P1 Vertical Openings | Reclamation Completed |
| Hubbard And Williams - 44/10-01 | P3 Gobs | Reclamation Pending |
| Jeffrey's Mines 1-3 - 41/09-01 | P2 Portals | Reclamation Pending |
| Jeffrey's Mines 1-3 - 41/09-01 | P3 Gobs | Reclamation Pending |
| Jeffryes (new) - 43/09-01 | P2 Portals | Reclamation Pending |
| Jeffryes (new) - 43/09-01 | P3 Gobs | Reclamation Pending |
| Jewell/horner - Not In Orig Inv | P1 Dangerous Highwalls | Reclamation Completed |
| Jewell/horner - Not In Orig Inv | P3 Gobs | Reclamation Completed |
| Keystone Mine - 40/16-01 | P1 Portals | Reclamation Completed |
| Keystone Mine - 40/16-01 | P2 Portals | Reclamation Pending |
| Keystone Mine - 40/16-01 | P3 Gobs | Reclamation Pending |
| Klay - 38/10-01 | P3 Mine Opening | Reclamation Pending |
| La Belle Mine - 39/09-02 | P3 Gobs | Reclamation Pending |
| La Belle Mine - 39/09-02 | P3 Mine Opening | Reclamation Pending |
| Labor/prospect Nos. 1-4 - 40/15-01 | P2 Portals | In Reclamation |
| Labor/prospect Nos. 1-4 - 40/15-01 | P3 Gobs | Reclamation Pending |
| Las Animas County - Coal - Co-wide | P2 Subsidence | Reclamation Pending |
| Las Animas County - Coal - Co-wide | P3 Gobs | Reclamation Pending |
| Las Animas County - Coal - Co-wide | P3 Gobs | Reclamation Pending |
| Las Animas County - Coal - Co-wide | P3 Mine Opening | Reclamation Pending |
| Las Animas County - Coal - Co-wide | P3 Mine Opening | Reclamation Pending |
| Liberty (new) - 27/36-01 | P1 Portals | Reclamation Completed |
| Liberty (new) - 27/36-01 | P2 Portals | Reclamation Pending |
| Liberty (new) - 27/36-01 | P3 Gobs | Reclamation Pending |
| Lunny/wiley - 33/09-01 | P2 Portals | Reclamation Pending |
| Lunny/wiley - 33/09-01 | P3 Gobs | Reclamation Pending |
| Main Cokedale Mine - 33/10-01 | P1 Portals | Reclamation Pending |
| Main Cokedale Mine - 33/10-01 | P1 Vertical Openings | Reclamation Completed |
| Main Cokedale Mine - 33/10-01 | P3 Gobs | Reclamation Pending |
| Mine Canyon Workings - 01/99-01 | P3 Gobs | Reclamation Pending |
| Mine Canyon Workings - 01/99-01 | P3 Mine Opening | Reclamation Pending |
| Moore/old Wagon Mine - 44/09-01 | P3 Mine Opening | Reclamation Pending |
| Morley - 43/98-01 | P1 Surface Burning | Reclamation Completed |
| Morley - 43/98-01 | P2 Portals | In Reclamation |
| Morley - 43/98-01 | P2 Surface Burning | Reclamation Completed |
| Morley - 43/98-01 | P2 Vertical Openings | Reclamation Pending |
| Morley - 43/98-01 | P3 Gobs | Reclamation Pending |
| New La Belle - 40/09-03 | P3 Gobs | Reclamation Pending |
| New La Belle - 40/09-03 | P3 Mine Opening | Reclamation Pending |
| North Cokedale Waste - 34/10-02 | P3 Gobs | Reclamation Pending |
| Nw Co Cnyn Mine - 38/14-01 | P2 Portals | In Reclamation |
| Nw Co Cnyn Mine - 38/14-01 | P3 Gobs | Reclamation Pending |
| Nw Of Boaglio Mines - 40/16-02 | P2 Portals | Reclamation Pending |
| Nw Of Boaglio Mines - 40/16-02 | P3 Gobs | Reclamation Pending |
| Nw Starkville Cemetery - 41/08-01 | P2 Portals | Reclamation Pending |
| Nw Starkville Cemetery - 41/08-01 | P3 Gobs | Reclamation Pending |
| Peacock Mine - 36/20-01 | P3 Gobs | Reclamation Pending |
| Peacock Mine - 36/20-01 | P3 Mine Opening | Reclamation Pending |
| Picketwire - 09/11-01 - Noi | P2 Portals | Reclamation Completed |
| Picketwire - 09/11-01 - Noi | P3 Gobs | Reclamation Pending |
…and 83 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 Abandoned43 on register
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Baldy CanyonAbandoned and Sealed 1980-09-29Surface coal · National Energy Resources Inc · MSHA ID 0503097
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Black Diamond SurfaceAbandoned 1977-09-01Surface coal · William R Horner & Margaret H Horner · MSHA ID 0503096
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Blasi PitAbandoned 2007-12-31Surface metal/non-metal · Diamond B Enterprises LLC · MSHA ID 0504751
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Bradley-Dussart PitAbandoned 1980-05-10Surface metal/non-metal · Peter Kiewit Sons' Company · MSHA ID 0503411
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Cappellucci Pit #1Abandoned 1985-02-05Surface metal/non-metal · J & M Aggregates Inc · MSHA ID 0503971
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Corral PitAbandoned 1985-07-05Surface metal/non-metal · Dillon Construction · MSHA ID 0503792
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CORRAL PITAbandoned 1999-06-15Surface metal/non-metal · Anthony A Blasi Trucking & Earthmoving · MSHA ID 0504608
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Crusher PitAbandoned 2017-10-23Surface metal/non-metal · Robinson Sons Inc. · MSHA ID 0504793
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Forbes MineAbandoned 1996-10-21Surface coal · Spanish Peaks Construction Company · MSHA ID 0504140
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Golden EagleAbandoned and Sealed 2004-12-30Underground coal · Basin Resources Inc. · MSHA ID 0502820
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Healey StripAbandoned 1996-10-21Surface coal · H & H Coal Enterprises · MSHA ID 0502897
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Helen #2 (Strip)Abandoned 1996-10-21Surface coal · Sundance Coal Company · MSHA ID 0503929
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Helen MineAbandoned and Sealed 1982-04-28Underground coal · Animas Coal Company Inc · MSHA ID 0503233
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HoweAbandoned 1981-06-17Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503436
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J Y JohnsonAbandoned 1982-08-17Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503435
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Jansen Load Out FacilityAbandoned 2025-01-29Facility coal · Robinson Sons Inc. · MSHA ID 0505010
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Jewel StripAbandoned 1980-09-29Surface coal · Horner Coal Company · MSHA ID 0502769
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Jolly PitAbandoned 1992-04-28Surface metal/non-metal · Walsenburg Sand & Gravel Company Inc · MSHA ID 0503915
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Kirkland Crusher No 1Abandoned 1989-08-11Surface metal/non-metal · Kirkland Construction · MSHA ID 0503983
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Lorencito Canyon MineAbandoned 2005-06-25Surface coal · Lorencito Coal Company, LLC · MSHA ID 0504712
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Martinez #2 UgAbandoned 1971-10-05Underground coal · Martinez Coal Company · MSHA ID 0500272
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Mincic PitAbandoned 1985-08-06Surface metal/non-metal · Aaa Roofing Company · MSHA ID 0504009
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New Elk MineAbandoned and Sealed 2017-01-14Underground coal · New Elk Coal Company LLC · MSHA ID 0500296
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New Elk Prep PlantAbandoned and Sealed 2023-04-01Facility coal · New Elk Coal Company LLC · MSHA ID 0504461
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North Star 1Abandoned 1990-06-14Surface coal · North Star Mining · MSHA ID 0504187
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ParsonsAbandoned 1982-08-17Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503700
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PORTABLE CRUSHERAbandoned 2010-10-15Surface metal/non-metal · Las Animas County Government · MSHA ID 0504514
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PORTABLE CRUSHING PLANTAbandoned 1997-08-26Surface metal/non-metal · Purgatoire Valley Construction Inc · MSHA ID 0504560
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Portable Crushing Plant #3Abandoned 2021-05-26Surface metal/non-metal · Southway Construction Company Inc · MSHA ID 2902223
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Portable ScreenAbandoned 2015-10-01Surface metal/non-metal · Las Animas County · MSHA ID 0504726
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Portable Screen 12207Abandoned 2021-05-26Surface metal/non-metal · Las Animas County Government · MSHA ID 0504869
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Portable Screening PlantAbandoned 2006-04-05Surface metal/non-metal · Valco, Inc. · MSHA ID 0504610
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Prosperity 2 /Ug/Abandoned 1971-03-04Underground coal · Pete Pantazes · MSHA ID 0500275
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Raton Creek Mine No 1Abandoned and Sealed 1999-08-12Underground coal · Energy Fuels Mining Company · MSHA ID 0503771
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Raton Creek Mine No 2Abandoned and Sealed 1999-08-12Underground coal · Energy Fuels Mining Company · MSHA ID 0503817
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Rimrock Coal MineAbandoned 1996-05-06Surface coal · Landmark Reclamation Inc · MSHA ID 0504246
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ShannonAbandoned 1979-10-09Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503338
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Shot Rock PitAbandoned 2024-09-06Surface metal/non-metal · Tamrock Gravel Company · MSHA ID 0504609
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Summit Pressed Brick & Tile MillAbandoned 1982-05-21Facility metal/non-metal · Summit Pressed Brick & Tile Company · MSHA ID 0502756
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The PitAbandoned 1989-09-06Surface metal/non-metal · Trinidad Redi-Mix · MSHA ID 0504376
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Tortorise PitAbandoned 1986-07-08Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503699
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Trinidad Basin MineAbandoned and Sealed 1986-02-11Surface coal · Trinidad Basin Mining Inc · MSHA ID 0503065
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Welte PitAbandoned 1978-04-13Surface metal/non-metal · Summit Pressed Brick & Tile Company · MSHA ID 0502196
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 | 254 |
| Prospect Pit | 159 |
| P3 Gobs | 81 |
| P2 Portals | 58 |
| Gravel Pit | 55 |
| Mine Dump | 30 |
| P3 Mine Opening | 26 |
| Gravel Pit | 16 |
| P1 Portals | 15 |
| P2 Vertical Openings | 15 |
| P2 Subsidence | 13 |
| P1 Vertical Openings | 11 |
| Mine Shaft | 8 |
| P1 Subsidence | 5 |
| Disturbed Surface | 4 |
| Borrow Pit | 3 |
| P2 Dangerous Piles & Embankments | 2 |
| Air Shaft | 2 |
| Clay Pit | 1 |
| Clay Pit | 1 |
| Quarry | 1 |
| P1 Dangerous Piles & Embankments | 1 |
| Borrow Pit | 1 |
| P1 Underground Mine Fires | 1 |
| P1 Dangerous Highwalls | 1 |
| P2 Hazardous Equip & Facilities | 1 |
| P2 Dangerous Impoundments | 1 |
| P1 Surface Burning | 1 |
| P2 Surface Burning | 1 |
Other counties in ColoradoAll 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
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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.
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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.
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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.
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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.
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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.
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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.
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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).
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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.