Abandoned mines in Dauphin County, Pennsylvania

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   37 15.6%
2. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   62 26.2%
3. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   53 22.4%
4. Dumps, tailings, spoil and gob

   what mining left above ground
   20 8.4%
5. Mills, tipples and facilities

   processing plants and hazardous structures
   5 2.1%
6. Other reclamation problems

   highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
   60 25.3%

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. A D Prep

   Facility coal · Ad Coal Company · MSHA ID 3602012
   Abandoned 1995-03-07
2. Amity Hall Plant And Pit

   Surface metal/non-metal · Pennsy Supply Inc · MSHA ID 3605732
   Abandoned 1990-05-03
3. Bear Gap Coal Co. #6 Slope

   Underground coal · Bear Gap Coal Co · MSHA ID 3609296
   Abandoned and Sealed 2006-03-22
4. Bear Valley Stripping

   Surface coal · Michael Coal Co., Inc. · MSHA ID 3609675
   Abandoned 2014-10-01
5. Bixler Mine

   Underground coal · S & T Coal Company · MSHA ID 3601984
   Abandoned and Sealed 1994-01-24
6. Brookside Slope

   Underground coal · White'S Coal Company · MSHA ID 3607615
   Abandoned and Sealed 1986-05-29
7. Buck Mountain Slope

   Underground coal · S & M Coal Company · MSHA ID 3602022
   Abandoned 2018-03-09
8. Buck Mountain Slope

   Underground coal · Miller Coal Company · MSHA ID 3602523
   Abandoned 1976-11-04
9. Buck Mt Slope

   Underground coal · S & K Coal Company · MSHA ID 3601981
   Abandoned 1980-05-15
10. Buck Mt Slope

    Underground coal · Smeltz Coal Company · MSHA ID 3602004
    Abandoned and Sealed 1988-12-29
11. Elizabethville Operation

    Facility coal · Michael Coal Company · MSHA ID 3609227
    Abandoned 2004-12-10
12. Game Commission Bank

    Facility coal · Meadowbrook Coal Co. Inc. · MSHA ID 3609056
    Abandoned 2008-09-08
13. Harris Mining

    Underground coal · Harris Coal Co. · MSHA ID 3609788
    Abandoned and Sealed 2011-06-22
14. Hummelstown Fine Grind Plant

    Facility metal/non-metal · Pennsy Supply Inc. · MSHA ID 3609418
    Abandoned 2009-02-13
15. Hummelstown Quarry

    Surface metal/non-metal · Pennsy Supply Inc · MSHA ID 3604291
    Abandoned 2018-04-11
16. J And D Adams Construction

    Facility coal · J & D Adams Construction · MSHA ID 3607818
    Abandoned 1987-11-10
17. Little Vein Slope

    Underground coal · S & S Anthracite Inc · MSHA ID 3601908
    Abandoned and Sealed 1986-02-18
18. Little Vein Slope

    Underground coal · Fox Coal Company · MSHA ID 3602000
    Abandoned and Sealed 1991-02-15
19. Lykens Stockpile

    Facility coal · Hecla Machinery & Equipment Company · MSHA ID 3603689
    Abandoned 1984-03-21
20. No 1 Slope

    Underground coal · Harris Coal Co. · MSHA ID 3609138
    Abandoned and Sealed 2010-04-14
21. No 1 Strip

    Surface coal · C & M Coal Company LLC · MSHA ID 3609710
    Abandoned 2024-09-30
22. No 2 Slope

    Underground coal · Morris Coal Company · MSHA ID 3607438
    Abandoned and Sealed 1986-02-14
23. No 5 Lykens Vein Slope

    Underground coal · Acme Coal Company · MSHA ID 3601778
    Abandoned and Sealed 1988-12-08
24. No 6 Vein Slope

    Underground coal · C R & C Coal Company · MSHA ID 3607289
    Abandoned and Sealed 1988-02-19
25. No 9 1/2 Vein Slope

    Underground coal · Reiner Coal Company · MSHA ID 3601960
    Abandoned 1971-03-11
26. Rumco No 1 Slope

    Underground coal · Rumco Coal Company · MSHA ID 3607534
    Abandoned and Sealed 1984-09-07
27. Short Mt Slope

    Underground coal · Short Mt Coal Company · MSHA ID 3608903
    Abandoned 2005-06-23
28. Underkoffler Breaker

    Facility coal · Harriman Coal Corp · MSHA ID 3602021
    Abandoned 2006-08-02
29. Wiconisco Silt Bank

    Facility coal · Reilly Contracting Company · MSHA ID 3607136
    Abandoned 1986-06-05
30. Williamstown Tunnel

    Underground coal · Ladnar Inc · MSHA ID 3608696
    Abandoned 2002-08-14

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

• Clearfield County 1,769
• Armstrong County 961
• Jefferson County 948
• Clarion County 943
• Butler County 920
• Westmoreland County 906
• Indiana County 897
• Somerset County 868
• Fayette County 861
• Schuylkill County 836
• Allegheny County 763
• Cambria County 753

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.