Abandoned mines in San Juan County, New Mexico
San Juan County, New Mexico has 272 mine and prospect features on USGS topographic maps published 1934–1985, including 89 mine openings (shafts, adits and air shafts) and 53 prospect pits; 12 of the features carry a name on the map. OSMRE's abandoned mine land inventory lists 363 problems in the county, 13 of them not yet reclaimed. MSHA's register carries 63 mines in the county with status Abandoned or Abandoned and Sealed.
Every mine and prospect feature the USGS digitized from historical topographic maps covering San Juan 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)
- 272
- Mine openings
- 89
- OSMRE problems unreclaimed
- 13
- MSHA mines marked abandoned
- 63
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169 26.6%Mine openingsshafts, adits, air shafts, portals and vertical openings: the ways into underground workings
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53 8.3%Prospect pits and trenchesshallow exploration diggings that never became a mine
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69 10.9%Mines and surface workingslabelled mines, open pits, strip mines, placer and hydraulic workings
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55 8.7%Quarries, gravel and borrow pitsconstruction-material and industrial-mineral extraction
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89 14.0%Dumps, tailings, spoil and gobwhat mining left above ground
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195 30.7%Other reclamation problemshighwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
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5 0.8%Othersymbols outside the classes above
| Name on map | Feature |
|---|---|
| Adamson Mine | Adit |
| Agency Coal Mine | Coal Mine |
| Black Diamond Mine | Adit |
| Enos Johnson Mine | Adit |
| Hendrickson Mine | Adit |
| Jones Mine | Adit |
| Morgan Mine | Adit |
| Navajo Mine | Open Pit Mine area |
| Pruitt Mine | Adit |
| Smouse Mine | Adit |
| Thomas Mine | Adit |
| Walker 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.
| Problem area | Problem | Status |
|---|---|---|
| Barber Peak Sites A & B | P2 Dangerous Highwalls | Reclamation Completed |
| Barber Peak Sites A & B | P2 Portals | Reclamation Completed |
| Barber Peak Sites A & B | P3 Gobs | Reclamation Completed |
| Barber Peak Sites A & B | P3 Other | Reclamation Completed |
| Barber Peak Sites A & B | P3 Pits | Reclamation Completed |
| Barber Peak South | P2 Industrial/Residential Waste | Reclamation Completed |
| Barber Peak South | P2 Portals | Reclamation Completed |
| Barber Peak South | P3 Gobs | Reclamation Completed |
| Barber Peak South | P3 Other | Reclamation Completed |
| Beclabito | P2 Dangerous Highwalls | Reclamation Completed |
| Beclabito | P3 Haul Road | Reclamation Completed |
| Beclabito | P3 Pits | Reclamation Completed |
| Beclabito 2: B | P1 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 2: B | P2 Dangerous Highwalls | Reclamation Completed |
| Beclabito 2: B | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 2: B | P2 Portals | Reclamation Completed |
| Beclabito 2: B | P3 Bench | Reclamation Completed |
| Beclabito 2: B | P3 Haul Road | Reclamation Completed |
| Beclabito 2: B | P3 Other | Reclamation Completed |
| Beclabito 2: Jimmie J. King #6 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 2: Jimmie J. King #6 | P2 Portals | Reclamation Completed |
| Beclabito 2: Jimmie J. King #6 | P3 Haul Road | Reclamation Completed |
| Beclabito 2: Jimmie J. King #6 | P3 Other | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P2 Dangerous Highwalls | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P2 Portals | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P3 Bench | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P3 Haul Road | Reclamation Completed |
| Beclabito 2: Rattlesnake 1 (shorty) | P3 Other | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Highwalls | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 4 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P2 Portals | Reclamation Completed |
| Beclabito 4 | P3 Bench | Reclamation Completed |
| Beclabito 4 | P3 Bench | Reclamation Completed |
| Beclabito 4 | P3 Bench | Reclamation Completed |
| Beclabito 4 | P3 Bench | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 Haul Road | Reclamation Completed |
| Beclabito 4 | P3 High Wall | Reclamation Completed |
| Beclabito 4 | P3 High Wall | Reclamation Completed |
| Beclabito 4 | P3 Mine Opening | Reclamation Completed |
| Beclabito 4 | P3 Mine Opening | Reclamation Completed |
| Beclabito Red Wash - CHIII | P2 Portals | Reclamation Completed |
| Beclabito Red Wash - CHIII | P3 Gobs | Reclamation Completed |
| Beclabito Red Wash - CHIII | P3 Water Problems | Reclamation Completed |
| Begay 1 | P1 Dangerous Highwalls | Reclamation Completed |
| Begay 1 | P1 Dangerous Piles & Embankments | Reclamation Completed |
| Begay 1 | P1 Portals | Reclamation Completed |
| Begay 1 | P1 Vertical Openings | Reclamation Completed |
| Begay 1 | P3 Haul Road | Reclamation Completed |
| Begay 1 | P3 Other | Reclamation Completed |
| Begay Incline / Begay 2 | P1 Dangerous Highwalls | Reclamation Completed |
| Begay Incline / Begay 2 | P1 Dangerous Piles & Embankments | Reclamation Completed |
| Begay Incline / Begay 2 | P1 Vertical Openings | Reclamation Completed |
| Begay Incline / Begay 2 | P3 Haul Road | Reclamation Completed |
| Begay Incline / Begay 2 | P3 Other | Reclamation Completed |
| Bisti - CHIII | P3 Water Problems | Reclamation Completed |
| Burnham Coal Fire South | P2 Surface Burning | Reclamation Pending |
| Burnham Coal Pit 1 | P1 Dangerous Highwalls | Reclamation Completed |
| Burnham Coal Pit 1 | P3 Gobs | Reclamation Completed |
| Burnham Coal Pit 1 | P3 Pits | Reclamation Completed |
| Burnham Coal Pit 2 | P1 Dangerous Highwalls | Reclamation Completed |
| Burnham Coal Pit 2 | P3 Gobs | Reclamation Completed |
| Burnham Coal Pit 2 | P3 Pits | Reclamation Completed |
| Burnham Coal Pit 3 | P1 Dangerous Highwalls | Reclamation Completed |
| Burnham Coal Pit 3 | P3 Gobs | Reclamation Completed |
| Burnham Coal Pit 3 | P3 Pits | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Highwalls | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Highwalls | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Highwalls | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Dangerous Piles & Embankments | Reclamation Completed |
| Carrizo 2 | P2 Portals | Reclamation Completed |
| Carrizo 2 | P2 Portals | Reclamation Completed |
| Carrizo 2 | P3 Bench | Reclamation Completed |
| Carrizo 2 | P3 Bench | Reclamation Completed |
| Carrizo 2 | P3 Bench | Reclamation Completed |
| Carrizo 2 | P3 Bench | Reclamation Completed |
| Carrizo 2 | P3 Bench | Reclamation Completed |
| Carrizo 2 | P3 Haul Road | Reclamation Completed |
| Carrizo 2 | P3 Haul Road | Reclamation Completed |
| Carrizo 2 | P3 Haul Road | Reclamation Completed |
| Carrizo 2 | P3 Haul Road | Reclamation Completed |
| Carrizo 2 | P3 Mine Opening | Reclamation Completed |
| Carrizo 2 | P3 Mine Opening | Reclamation Completed |
| Carrizo 2 | P3 Mine Opening | Reclamation Completed |
| Carrizo 2 | P3 Pits | Reclamation Completed |
| Chaco River Site 1 & 2 | P2 Portals | Reclamation Completed |
| Chaco River Site 1 & 2 | P3 Gobs | Reclamation Completed |
| Chaco River Site 1 & 2 | P3 Other | Reclamation Completed |
| Chaco Wash Mine | P3 Equipment Facility | Reclamation Completed |
| Chaco Wash Mine | P3 Gobs | Reclamation Completed |
| Chaco Wash Mine | P3 Mine Opening | Reclamation Completed |
| Chaco Wash Mine | P3 Pits | Reclamation Completed |
| Chaco Wash Mine | P3 Spoil Area | Reclamation Completed |
| Chinde Wash 2 | P2 Portals | Reclamation Completed |
| Chinde Wash 2 | P3 Gobs | Reclamation Completed |
| Chinde Wash 2 | P3 Other | Reclamation Completed |
| Chinde Wash Mine | P3 Mine Opening | Reclamation Completed |
| Chinde Wash Mine | P3 Other | Reclamation Completed |
| Chinde Wash Mine | P3 Pits | Reclamation Completed |
| Chinde Wash Mine | P3 Spoil Area | Reclamation Completed |
| Cove 4 | P2 Portals | Reclamation Completed |
| Day Mesa I Sites A, B, & C | P2 Dangerous Highwalls | Reclamation Completed |
| Day Mesa I Sites A, B, & C | P3 Gobs | Reclamation Completed |
| Day Mesa I Sites A, B, & C | P3 Other | Reclamation Completed |
| Day Mesa I Sites A, B, & C | P3 Pits | Reclamation Completed |
| Day Mesa Ii (site B & C ) | P2 Portals | Reclamation Completed |
| Day Mesa Ii (site B & C ) | P3 Gobs | Reclamation Completed |
| Day Mesa Ii (site B & C ) | P3 High Wall | Reclamation Completed |
| Day Mesa Ii (site B & C ) | P3 Other | Reclamation Completed |
| Day Mesa Ii (site B & C ) | P3 Pits | Reclamation Completed |
| Halgaii Toh | P3 Mine Opening | Reclamation Completed |
| Halgaii Toh | P3 Spoil Area | Reclamation Completed |
| James Barber Mine | P2 Portals | Reclamation Completed |
| James Barber Mine | P3 Gobs | Reclamation Completed |
| James Barber Mine | P3 Pits | Reclamation Completed |
| James Barber Mine | P3 Spoil Area | Reclamation Completed |
| John Joe Mine | P1 Vertical Openings | Reclamation Completed |
| John Joe Mine | P3 Gobs | Reclamation Completed |
| John Joe Mine | P3 Pits | Reclamation Completed |
| King Tutt Point (plot 2) | P1 Dangerous Highwalls | Reclamation Completed |
| King Tutt Point (plot 2) | P1 Dangerous Piles & Embankments | Reclamation Completed |
| King Tutt Point (plot 2) | P1 Portals | Reclamation Completed |
| King Tutt Point (plot 2) | P3 Haul Road | Reclamation Completed |
| King Tutt Point (plot 2) | P3 Other | Reclamation Completed |
| La Vida Mission Mine | P2 Surface Burning | Reclamation Completed |
| Lake Valley Senior Citizen Center | PF Public (Infra) Structure | Reclamation Completed |
| Littlewater Iii | P2 Portals | Reclamation Completed |
| Littlewater Iii | P3 Gobs | Reclamation Completed |
| Littlewater Iii | P3 Other | Reclamation Completed |
| Littlewater Mine North_CHI | P2 Portals | Reclamation Completed |
| Littlewater Mine North_CHI | P3 Gobs | Reclamation Completed |
…and 213 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.
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Anderson CrusherAbandoned 1985-08-08Surface metal/non-metal · Bob Anderson Construction Inc · MSHA ID 2901967
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Anderson EnterprisesAbandoned 1988-06-20Surface metal/non-metal · Anderson Enterprises · MSHA ID 2901127
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Arco PitAbandoned 1984-06-15Surface metal/non-metal · J W Jones Construction Company · MSHA ID 2901918
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Arco Portable Screen PlantAbandoned 1985-09-23Surface metal/non-metal · Arco Materials Inc · MSHA ID 2900419
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AZTEC AGGREGATEAbandoned 1999-12-06Surface metal/non-metal · Fesco Inc · MSHA ID 2902081
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Barnett PitAbandoned 1980-07-09Surface metal/non-metal · Barnett Construction Company · MSHA ID 2901789
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BASIN AGGREGATE (WATERFLOW PLT)Abandoned 1999-08-31Surface metal/non-metal · Basin Aggregate · MSHA ID 2902159
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Bisti Wash PlantAbandoned 2017-01-17Surface metal/non-metal · Oldcastle SW Group Inc · MSHA ID 2902097
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Black Diamond MineAbandoned 2004-04-16Surface coal · San Juan Coal Company · MSHA ID 2901872
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Black Diamond StripAbandoned 1976-03-18Surface coal · Tree Doctors · MSHA ID 2900659
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Bloomfield West MineAbandoned 1995-06-01Surface metal/non-metal · Bloomfield Gravel Inc · MSHA ID 2902114
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Burnett Construction CrusherAbandoned 1985-06-24Surface metal/non-metal · Burnett Construction Company · MSHA ID 2901915
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Burnham MineAbandoned 1996-08-22Surface coal · Consolidation Coal Company · MSHA ID 2901711
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CC04Abandoned 2016-12-05Surface metal/non-metal · Consolidated Constructors, Inc. · MSHA ID 2902266
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CHACO LIMESTONE QUARRYAbandoned 2011-12-14Surface metal/non-metal · CHACO LIMESTONE QUARRY LLC · MSHA ID 2902390
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Chaco Wash PitAbandoned 1980-02-12Surface metal/non-metal · Kent Nowlin Construction Inc · MSHA ID 2901697
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Cone CrusherAbandoned 2010-12-10Surface metal/non-metal · Hard Rock Ent LLC · MSHA ID 2902368
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CROUCH MESA PITAbandoned 2003-07-25Surface metal/non-metal · Newco Aggregates · MSHA ID 2902202
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Crusher No 1Abandoned 1995-01-27Surface metal/non-metal · San Juan Concrete Company · MSHA ID 2900485
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De-Na-ZinAbandoned 1989-01-30Surface coal · Yampa Mining Company · MSHA ID 2901833
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Decker Sand PitAbandoned 2011-07-20Surface metal/non-metal · K W Enterprises LLC · MSHA ID 2902397
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DOUG FOUTZ CONSTRUCTIONAbandoned 2010-01-21Surface metal/non-metal · Doug Foutz Construction · MSHA ID 2901886
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El Paso Coal Project No 1Abandoned 1980-05-01Surface coal · El Paso Coal Company · MSHA ID 2901821
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El Paso Coal Project No 2Abandoned 1980-05-01Surface coal · El Paso Coal Company · MSHA ID 2901822
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Enos JohnsonAbandoned 1982-11-16Underground metal/non-metal · Ray Williams Mining · MSHA ID 2900602
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FCM Crusher 2Abandoned 2011-11-18Surface metal/non-metal · Oldcastle SW Group Inc. · MSHA ID 2902262
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FCM Portable CrusherAbandoned 2016-12-05Surface metal/non-metal · Four Corners Materials · MSHA ID 2900450
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FCM Washplant #2Abandoned 2011-11-18Surface metal/non-metal · Oldcastle SW Group Inc · MSHA ID 2902306
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Foutz & Bursum PitAbandoned 2003-05-05Surface metal/non-metal · Foutz & Bursum Construction Company Inc. · MSHA ID 2902239
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Fruitland PitAbandoned 1986-06-25Surface metal/non-metal · Mountain Gravel & Construction Company · MSHA ID 2901474
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Garcia & Sons Sand & GravelAbandoned 1996-06-25Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2901889
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GatewayAbandoned 1989-01-30Surface coal · Yampa Mining Company · MSHA ID 2901868
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Hogback No 1 (Ug)Abandoned 1971-02-12Underground coal · Clifford George · MSHA ID 2900125
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Hogback No 13Abandoned 1971-02-12Underground coal · George R Simpson & Hollis L Tate · MSHA ID 2900094
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Impact CrusherAbandoned 2010-08-04Surface metal/non-metal · Hard Rock Ent LLC · MSHA ID 2902369
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Kirtland PitAbandoned 2015-07-29Surface metal/non-metal · Sterling Brothers Construction Inc · MSHA ID 2902140
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L J Double ConeAbandoned 1987-03-27Surface metal/non-metal · Nielsons Inc · MSHA ID 2901902
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La Plata MineAbandoned 2009-02-25Surface coal · San Juan Coal Company · MSHA ID 2901825
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La Plata PitAbandoned 1994-03-24Surface metal/non-metal · Asphalt Paving Company · MSHA ID 2900422
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Mascarenas PitAbandoned 1985-09-16Surface metal/non-metal · Mascarenas Backhoe & Dump Truck Service · MSHA ID 2901917
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Neca PitAbandoned 1988-08-01Surface metal/non-metal · Nielsons Inc · MSHA ID 2901737
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Neff Trust QuarryAbandoned 2011-07-20Surface metal/non-metal · KW Enterprises LLC · MSHA ID 2902284
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NM Wash PlantAbandoned 2006-01-05Surface metal/non-metal · Four Corners Materials · MSHA ID 2901073
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NM WASH PLT #2-PLT #1201Abandoned 1998-05-20Surface metal/non-metal · Western Mobile Four Corners Division · MSHA ID 2902135
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P V PitAbandoned 2024-01-22Surface metal/non-metal · Paul & Son Construction Inc · MSHA ID 2902199
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Portable Plant #18Abandoned 2002-01-22Surface metal/non-metal · Western Mobile Northern Inc · MSHA ID 2901772
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Price PitAbandoned 2010-01-01Surface metal/non-metal · Farnsworth Development Inc · MSHA ID 2902398
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Red Shale CrusherAbandoned 1992-02-14Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2901341
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Red Shale MineAbandoned 2011-12-07Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2900786
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Rock LockAbandoned 1986-06-12Surface metal/non-metal · Rock Lock Inc · MSHA ID 2901996
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San Juan CountyAbandoned 1995-03-27Surface metal/non-metal · San Juan County · MSHA ID 2901901
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San Juan DeepAbandoned 2002-06-14Underground coal · San Juan Coal Company · MSHA ID 2902201
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San Juan Mine And PlantAbandoned 2007-11-30Surface coal · San Juan Coal Company · MSHA ID 2901168
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San Juan PitAbandoned 2018-06-01Surface metal/non-metal · Crossfire Aggregate Services LLC · MSHA ID 2902440
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San Juan Preparation PlantAbandoned 1988-06-01Facility coal · San Juan Coal Company · MSHA ID 2901153
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San Juan-Shumay Diversion ProjectAbandoned 1982-02-26Facility coal · San Juan Coal Company · MSHA ID 2901873
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SHERRY'S ROCKSAbandoned 2002-07-30Surface metal/non-metal · Sherry'S Rocks · MSHA ID 2902208
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Shiprock PitAbandoned 1982-11-16Surface metal/non-metal · Shiprock Gravel Co Inc · MSHA ID 2900817
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Sunbelt Mining Company Incorporated GravAbandoned 1983-01-01Surface metal/non-metal · Sunbelt Mining Company Inc · MSHA ID 2901768
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SUNTEAL AGGREGATESAbandoned 2005-08-04Surface metal/non-metal · Sun Teal Aggregates Inc · MSHA ID 2901767
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WEEMINUCHE CONST AUTHORITYAbandoned 1999-08-27Surface metal/non-metal · Weeminuche Construction Authority · MSHA ID 2902183
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Western Coal Underground Test MineAbandoned 1979-10-01Underground coal · Western Coal Company · MSHA ID 2901609
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White RockAbandoned 1978-08-03Surface metal/non-metal · Kent Nowlin Construction Inc · MSHA ID 2901696
Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.
| Feature type | Features |
|---|---|
| Adit | 88 |
| P2 Portals | 53 |
| Prospect Pit | 53 |
| Disturbed Surface | 47 |
| P3 Haul Road | 34 |
| P3 Gobs | 33 |
| P2 Dangerous Piles & Embankments | 30 |
| P3 Other | 29 |
| Gravel Pit | 27 |
| P3 Bench | 25 |
| P2 Dangerous Highwalls | 23 |
| P3 Pits | 19 |
| Gravel Pit | 19 |
| P1 Dangerous Highwalls | 14 |
| Open Pit Mine | 12 |
| P3 Mine Opening | 12 |
| P1 Vertical Openings | 12 |
| P3 Spoil Area | 11 |
| P3 Water Problems | 11 |
| P1 Portals | 10 |
| Open Pit Mine | 9 |
| P1 Dangerous Piles & Embankments | 9 |
| P2 Subsidence | 7 |
| Tailings - Pond | 6 |
| P2 Vertical Openings | 5 |
| Borrow Pit | 4 |
| P3 High Wall | 4 |
| PF Other | 3 |
| Gravel/Borrow Pit - Undifferentiated | 3 |
| P1 Subsidence | 3 |
| P3 Industrial/Residential Waste | 2 |
| P3 Equipment Facility | 2 |
| P2 Surface Burning | 2 |
| P1 Clogged Stream Lands | 2 |
| P2 Underground Mine Fires | 2 |
| P1 Surface Burning | 1 |
| P5 Open Space Benefits | 1 |
| P2 Industrial/Residential Waste | 1 |
| Gravel/Borrow Pit - Undifferentiated | 1 |
| Mine Shaft | 1 |
| Coal Mine | 1 |
| PH 411(h)(2) Non-Mining Expenditure | 1 |
| P2 Dangerous Slides | 1 |
| Quarry | 1 |
| PF Public (Infra) Structure | 1 |
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.
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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.