Abandoned mines in Jackson County, Colorado

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   49 24.6%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   25 12.6%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   71 35.7%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   35 17.6%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   10 5.0%
6. Mills, tipples and facilities

   processing plants and hazardous structures
   1 0.5%
7. Other reclamation problems

   highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
   8 4.0%

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 types carry OSMRE's priority prefix: P1 and P2 are threats to health, safety and property, P3 is environmental. A problem area is a cluster of problems reclaimed as one project; several rows can share one location.

1. Bourg

   Surface coal · Walden Coal Company · MSHA ID 0503517
   Abandoned 1989-05-01
2. Canadian Strip

   Surface coal · Wyoming Fuel Company · MSHA ID 0502661
   Abandoned 1987-07-09
3. Cautrell & Sons Excavating Murphy Pit

   Surface metal/non-metal · Cautrell & Sons Excavating · MSHA ID 0503632
   Abandoned 1993-08-25
4. Corkle Mine

   Surface metal/non-metal · Corkle Construction · MSHA ID 0505007
   Abandoned 2020-10-05
5. Grand Gravel Pit

   Surface metal/non-metal · Grand Gravel Company · MSHA ID 0503846
   Abandoned 1988-09-13
6. Grizzly Creek Strip

   Surface coal · Resource Exploration & Mining Inc · MSHA ID 0502688
   Abandoned 1978-07-31
7. High Country Hard Rock

   Surface metal/non-metal · Sibson Gravel L.L.C. · MSHA ID 0505157
   Abandoned 2024-09-05
8. Holsinger Gravel Pit

   Surface metal/non-metal · Hughes Construction · MSHA ID 0503848
   Abandoned 1985-07-08
9. Jackson County Screen #45

   Surface metal/non-metal · Jackson County Road and Bridge · MSHA ID 0504063
   Abandoned 2015-02-27
10. Kerr Tipple

    Facility coal · Kerr Coal Corp · MSHA ID 0502660
    Abandoned 2003-11-24
11. Marr Strip

    Surface coal · Kerr Coal Corp · MSHA ID 0502674
    Abandoned 1993-03-18
12. Portable Crusher #1

    Surface metal/non-metal · Wyatt Redi-Mix Co · MSHA ID 0504859
    Abandoned 2018-04-10
13. Sessions #1

    Surface metal/non-metal · Glenn E Sessions & Sons Inc · MSHA ID 0504062
    Abandoned 1987-09-16
14. Shawver

    Surface metal/non-metal · Colorado Department Of Highways · MSHA ID 0503375
    Abandoned 1982-08-12
15. Wyatt Redi-Mix

    Surface metal/non-metal · Wyatt Redi-Mix · MSHA ID 0503843
    Abandoned 1985-08-14
16. WYATT REDI-MIX, PIT # 1

    Surface metal/non-metal · Wyatt Redi-Mix · MSHA ID 0503847
    Abandoned 2012-09-06

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

• San Juan County 3,913
• Lake County 3,672
• Gunnison County 2,703
• Saguache County 2,319
• San Miguel County 2,242
• Gilpin County 2,148
• Montrose County 2,077
• Custer County 2,062
• Clear Creek County 1,996
• Park County 1,624
• Chaffee County 1,486
• Summit County 1,449

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.