Mining Incidents
Abandoned mine inventory

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
12 features carry a name53 prospect pits45 quadrangle maps, published 1934–1985 363 OSMRE problems, 350 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
    169 26.6%
  2. Prospect pits and trenches
    shallow exploration diggings that never became a mine
    53 8.3%
  3. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    69 10.9%
  4. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    55 8.7%
  5. Dumps, tailings, spoil and gob
    what mining left above ground
    89 14.0%
  6. Other reclamation problems
    highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
    195 30.7%
  7. Other
    symbols outside the classes above
    5 0.8%
Named features on the maps12 named · from the USGS compilation
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.

OSMRE abandoned mine land problems363 on inventory
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.

MSHA-registered mines with status Abandoned63 on register
  1. Anderson Crusher
    Surface metal/non-metal · Bob Anderson Construction Inc · MSHA ID 2901967
    Abandoned
  2. Anderson Enterprises
    Surface metal/non-metal · Anderson Enterprises · MSHA ID 2901127
    Abandoned
  3. Arco Pit
    Surface metal/non-metal · J W Jones Construction Company · MSHA ID 2901918
    Abandoned
  4. Arco Portable Screen Plant
    Surface metal/non-metal · Arco Materials Inc · MSHA ID 2900419
    Abandoned
  5. AZTEC AGGREGATE
    Surface metal/non-metal · Fesco Inc · MSHA ID 2902081
    Abandoned
  6. Barnett Pit
    Surface metal/non-metal · Barnett Construction Company · MSHA ID 2901789
    Abandoned
  7. BASIN AGGREGATE (WATERFLOW PLT)
    Surface metal/non-metal · Basin Aggregate · MSHA ID 2902159
    Abandoned
  8. Bisti Wash Plant
    Surface metal/non-metal · Oldcastle SW Group Inc · MSHA ID 2902097
    Abandoned
  9. Black Diamond Mine
    Surface coal · San Juan Coal Company · MSHA ID 2901872
    Abandoned
  10. Black Diamond Strip
    Surface coal · Tree Doctors · MSHA ID 2900659
    Abandoned
  11. Bloomfield West Mine
    Surface metal/non-metal · Bloomfield Gravel Inc · MSHA ID 2902114
    Abandoned
  12. Burnett Construction Crusher
    Surface metal/non-metal · Burnett Construction Company · MSHA ID 2901915
    Abandoned
  13. Burnham Mine
    Surface coal · Consolidation Coal Company · MSHA ID 2901711
    Abandoned
  14. CC04
    Surface metal/non-metal · Consolidated Constructors, Inc. · MSHA ID 2902266
    Abandoned
  15. CHACO LIMESTONE QUARRY
    Surface metal/non-metal · CHACO LIMESTONE QUARRY LLC · MSHA ID 2902390
    Abandoned
  16. Chaco Wash Pit
    Surface metal/non-metal · Kent Nowlin Construction Inc · MSHA ID 2901697
    Abandoned
  17. Cone Crusher
    Surface metal/non-metal · Hard Rock Ent LLC · MSHA ID 2902368
    Abandoned
  18. CROUCH MESA PIT
    Surface metal/non-metal · Newco Aggregates · MSHA ID 2902202
    Abandoned
  19. Crusher No 1
    Surface metal/non-metal · San Juan Concrete Company · MSHA ID 2900485
    Abandoned
  20. De-Na-Zin
    Surface coal · Yampa Mining Company · MSHA ID 2901833
    Abandoned
  21. Decker Sand Pit
    Surface metal/non-metal · K W Enterprises LLC · MSHA ID 2902397
    Abandoned
  22. DOUG FOUTZ CONSTRUCTION
    Surface metal/non-metal · Doug Foutz Construction · MSHA ID 2901886
    Abandoned
  23. El Paso Coal Project No 1
    Surface coal · El Paso Coal Company · MSHA ID 2901821
    Abandoned
  24. El Paso Coal Project No 2
    Surface coal · El Paso Coal Company · MSHA ID 2901822
    Abandoned
  25. Enos Johnson
    Underground metal/non-metal · Ray Williams Mining · MSHA ID 2900602
    Abandoned
  26. FCM Crusher 2
    Surface metal/non-metal · Oldcastle SW Group Inc. · MSHA ID 2902262
    Abandoned
  27. FCM Portable Crusher
    Surface metal/non-metal · Four Corners Materials · MSHA ID 2900450
    Abandoned
  28. FCM Washplant #2
    Surface metal/non-metal · Oldcastle SW Group Inc · MSHA ID 2902306
    Abandoned
  29. Foutz & Bursum Pit
    Surface metal/non-metal · Foutz & Bursum Construction Company Inc. · MSHA ID 2902239
    Abandoned
  30. Fruitland Pit
    Surface metal/non-metal · Mountain Gravel & Construction Company · MSHA ID 2901474
    Abandoned
  31. Garcia & Sons Sand & Gravel
    Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2901889
    Abandoned
  32. Gateway
    Surface coal · Yampa Mining Company · MSHA ID 2901868
    Abandoned
  33. Hogback No 1 (Ug)
    Underground coal · Clifford George · MSHA ID 2900125
    Abandoned
  34. Hogback No 13
    Underground coal · George R Simpson & Hollis L Tate · MSHA ID 2900094
    Abandoned
  35. Impact Crusher
    Surface metal/non-metal · Hard Rock Ent LLC · MSHA ID 2902369
    Abandoned
  36. Kirtland Pit
    Surface metal/non-metal · Sterling Brothers Construction Inc · MSHA ID 2902140
    Abandoned
  37. L J Double Cone
    Surface metal/non-metal · Nielsons Inc · MSHA ID 2901902
    Abandoned
  38. La Plata Mine
    Surface coal · San Juan Coal Company · MSHA ID 2901825
    Abandoned
  39. La Plata Pit
    Surface metal/non-metal · Asphalt Paving Company · MSHA ID 2900422
    Abandoned
  40. Mascarenas Pit
    Surface metal/non-metal · Mascarenas Backhoe & Dump Truck Service · MSHA ID 2901917
    Abandoned
  41. Neca Pit
    Surface metal/non-metal · Nielsons Inc · MSHA ID 2901737
    Abandoned
  42. Neff Trust Quarry
    Surface metal/non-metal · KW Enterprises LLC · MSHA ID 2902284
    Abandoned
  43. NM Wash Plant
    Surface metal/non-metal · Four Corners Materials · MSHA ID 2901073
    Abandoned
  44. NM WASH PLT #2-PLT #1201
    Surface metal/non-metal · Western Mobile Four Corners Division · MSHA ID 2902135
    Abandoned
  45. P V Pit
    Surface metal/non-metal · Paul & Son Construction Inc · MSHA ID 2902199
    Abandoned
  46. Portable Plant #18
    Surface metal/non-metal · Western Mobile Northern Inc · MSHA ID 2901772
    Abandoned
  47. Price Pit
    Surface metal/non-metal · Farnsworth Development Inc · MSHA ID 2902398
    Abandoned
  48. Red Shale Crusher
    Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2901341
    Abandoned
  49. Red Shale Mine
    Surface metal/non-metal · Garcia & Sons Inc · MSHA ID 2900786
    Abandoned
  50. Rock Lock
    Surface metal/non-metal · Rock Lock Inc · MSHA ID 2901996
    Abandoned
  51. San Juan County
    Surface metal/non-metal · San Juan County · MSHA ID 2901901
    Abandoned
  52. San Juan Deep
    Underground coal · San Juan Coal Company · MSHA ID 2902201
    Abandoned
  53. San Juan Mine And Plant
    Surface coal · San Juan Coal Company · MSHA ID 2901168
    Abandoned
  54. San Juan Pit
    Surface metal/non-metal · Crossfire Aggregate Services LLC · MSHA ID 2902440
    Abandoned
  55. San Juan Preparation Plant
    Facility coal · San Juan Coal Company · MSHA ID 2901153
    Abandoned
  56. San Juan-Shumay Diversion Project
    Facility coal · San Juan Coal Company · MSHA ID 2901873
    Abandoned
  57. SHERRY'S ROCKS
    Surface metal/non-metal · Sherry'S Rocks · MSHA ID 2902208
    Abandoned
  58. Shiprock Pit
    Surface metal/non-metal · Shiprock Gravel Co Inc · MSHA ID 2900817
    Abandoned
  59. Sunbelt Mining Company Incorporated Grav
    Surface metal/non-metal · Sunbelt Mining Company Inc · MSHA ID 2901768
    Abandoned
  60. SUNTEAL AGGREGATES
    Surface metal/non-metal · Sun Teal Aggregates Inc · MSHA ID 2901767
    Abandoned
  61. WEEMINUCHE CONST AUTHORITY
    Surface metal/non-metal · Weeminuche Construction Authority · MSHA ID 2902183
    Abandoned
  62. Western Coal Underground Test Mine
    Underground coal · Western Coal Company · MSHA ID 2901609
    Abandoned
  63. White Rock
    Surface metal/non-metal · Kent Nowlin Construction Inc · MSHA ID 2901696
    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
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
Other counties in New MexicoAll 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.