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Abandoned mines › Maine
Abandoned mine inventory

Abandoned mines in Penobscot County, Maine

Penobscot County, Maine has 469 mine and prospect features on USGS topographic maps published 1955–1996. MSHA's register carries 61 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Penobscot 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)
469
Mine openings
0
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
61
0 features carry a name0 prospect pits75 quadrangle maps, published 1955–1996 0 MSHA mines abandoned and sealed
What the features are
  1. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    16 3.4%
  2. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    453 96.6%
MSHA-registered mines with status Abandoned61 on register
  1. #39 MASTER SCREEN
    Surface metal/non-metal · Lane Construction Corporation · MSHA ID 1700727
    Abandoned
  2. #80195 Portable Screen CV100
    Surface metal/non-metal · Sargent Corporation · MSHA ID 1700469
    Abandoned
  3. Alton Pit
    Surface metal/non-metal · ABS Construction Inc · MSHA ID 1700814
    Abandoned
  4. Astec Screen 214941
    Surface metal/non-metal · Eurovia Atlantic Coast LLC · MSHA ID 1701130
    Abandoned
  5. Bangor Mine And Mill
    Surface metal/non-metal · Hughes Brothers Incorp · MSHA ID 1700207
    Abandoned
  6. Bangor Portable Plant
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700622
    Abandoned
  7. Barber Greene - T55-703
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700559
    Abandoned
  8. City Of Old Town Pit And Mill
    Surface metal/non-metal · City Of Old Town · MSHA ID 1700338
    Abandoned
  9. Dixmont
    Surface metal/non-metal · R.A. Paradis and Son Inc. · MSHA ID 1701066
    Abandoned
  10. Dunn Pit & Plant
    Surface metal/non-metal · Frank Landry & Sons, Inc · MSHA ID 1700971
    Abandoned
  11. Faloon Pit
    Surface metal/non-metal · Faloon Construction · MSHA ID 1700560
    Abandoned
  12. FARRINGTON
    Surface metal/non-metal · Porter Construction · MSHA ID 1700683
    Abandoned
  13. FRINK PIT AND MILL
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700208
    Abandoned
  14. G & D Properties
    Surface metal/non-metal · G & D Properties Inc · MSHA ID 1700833
    Abandoned
  15. Gardiner Pit & Mill
    Surface metal/non-metal · Herbert Graham · MSHA ID 1700111
    Abandoned
  16. Glenburn Sand and Gravel
    Surface metal/non-metal · Glenburn Sand and Gravel LLC · MSHA ID 1700986
    Abandoned
  17. Hampden Pit And Mill
    Surface metal/non-metal · Allen L Rooks Inc · MSHA ID 1700250
    Abandoned
  18. Hampden Pits
    Surface metal/non-metal · Perkins Construction Company Inc · MSHA ID 1700382
    Abandoned
  19. Harriman Pit
    Surface metal/non-metal · PENOBSCOT Sand Gravel & Stone LLC · MSHA ID 1700761
    Abandoned
  20. HERMON SAND & GRAVEL LLC
    Surface metal/non-metal · HERMON SAND & GRAVEL LLC · MSHA ID 1700772
    Abandoned
  21. Hughes Portable Plant #1
    Surface metal/non-metal · Hughes Bros., Inc. · MSHA ID 1701055
    Abandoned
  22. Hunter Pit
    Surface metal/non-metal · Street & Sanborn · MSHA ID 1700419
    Abandoned
  23. JCI K300 #81036
    Surface metal/non-metal · Sargent Corporation · MSHA ID 1700294
    Abandoned
  24. K & C CON, INC.
    Surface metal/non-metal · K & C Construction Inc · MSHA ID 1700676
    Abandoned
  25. Kolman Portable Screen
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700624
    Abandoned
  26. Levesque Gravel
    Surface metal/non-metal · Levesque Gravel · MSHA ID 1700976
    Abandoned
  27. Lincoln Pit & Mill
    Surface metal/non-metal · G E Goding & Son Inc · MSHA ID 1700220
    Abandoned
  28. Littlefield Pit
    Surface metal/non-metal · Owen J Folsom Inc · MSHA ID 1700309
    Abandoned
  29. Mary Jane Pit
    Surface metal/non-metal · Gardner Construction Enterprises LLC · MSHA ID 1700911
    Abandoned
  30. Medway Pit And Mill
    Surface metal/non-metal · Tilcon Maine Inc · MSHA ID 1700328
    Abandoned
  31. Medway Portable Plant No T55-70
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700536
    Abandoned
  32. Newburgh Pit
    Surface metal/non-metal · Lou Silver Inc. · MSHA ID 1700671
    Abandoned
  33. NEWBURGH PIT
    Surface metal/non-metal · Lou Silver Inc · MSHA ID 1700673
    Abandoned
  34. Orono Plant
    Facility metal/non-metal · Lane Construction Corp · MSHA ID 1700118
    Abandoned
  35. Orrington Pit
    Surface metal/non-metal · City Of Brewer · MSHA ID 1700335
    Abandoned
  36. Peerless T55-710
    Surface metal/non-metal · Maine Department Of Transportation · MSHA ID 1700558
    Abandoned
  37. Perry Mine And Mill
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700142
    Abandoned
  38. PIKE INDUSTRIES, INC. C614
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 1700625
    Abandoned
  39. Pit 5
    Surface metal/non-metal · Thornton Construction, Inc. · MSHA ID 1700893
    Abandoned
  40. Plymouth Pit
    Surface metal/non-metal · Plymouth Sand And Gravel · MSHA ID 1700667
    Abandoned
  41. PORTABLE MILL
    Surface metal/non-metal · Sunrise Materials-Div/Lane Construction Corp · MSHA ID 1700511
    Abandoned
  42. Portable Peerless Screening Plant
    Surface metal/non-metal · Owen J. Folsom, Inc. · MSHA ID 1700890
    Abandoned
  43. Portable Plant
    Surface metal/non-metal · VAUGHN THIBODEAU & SONS INC · MSHA ID 1700720
    Abandoned
  44. PORTABLE SANDSCREEN C655
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 1700626
    Abandoned
  45. Portable Screen #36
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700532
    Abandoned
  46. Portable Track Screen
    Surface metal/non-metal · ABS Construction Inc. · MSHA ID 1700969
    Abandoned
  47. POWERS PIT
    Surface metal/non-metal · Ben Fiske & Sons Inc · MSHA ID 1700545
    Abandoned
  48. PTBL Wash Plant # 800003
    Surface metal/non-metal · Sargent Corporation · MSHA ID 1700448
    Abandoned
  49. Public Works
    Surface metal/non-metal · City of Bangor DPW · MSHA ID 1701113
    Abandoned
  50. Reed Screen-21693
    Surface metal/non-metal · Eurovia Atlantic Coast LLC · MSHA ID 1700894
    Abandoned
  51. Russell's Gravel
    Surface metal/non-metal · Streets Landscape & Lawn Care · MSHA ID 1701039
    Abandoned
  52. Screen Plant
    Surface metal/non-metal · Elwood Downs Incorporated · MSHA ID 1700908
    Abandoned
  53. Screening plant
    Surface metal/non-metal · Smallwood Inc · MSHA ID 1700912
    Abandoned
  54. SHOP PLANT
    Surface metal/non-metal · Cummings Concrete Inc · MSHA ID 1700527
    Abandoned
  55. Smith Pit
    Surface metal/non-metal · Town Of Holden · MSHA ID 1700362
    Abandoned
  56. Sprague Quarry
    Surface metal/non-metal · Gardner Construction Enterprises · MSHA ID 1700869
    Abandoned
  57. Sunrise Materials Medway Plant
    Surface metal/non-metal · Lane Construction Corp · MSHA ID 1700623
    Abandoned
  58. Sunset Pit
    Surface metal/non-metal · Sunset Development Inc · MSHA ID 1700762
    Abandoned
  59. Thor Pit
    Surface metal/non-metal · Buck LLC · MSHA ID 1700945
    Abandoned
  60. Town Pit
    Surface metal/non-metal · Town Of Hampden · MSHA ID 1700353
    Abandoned
  61. Whitney Pit
    Surface metal/non-metal · Elwood L Downs & Son · MSHA ID 1700418
    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
Gravel Pit 261
Gravel Pit 154
Open Pit Mine or Quarry 16
Sand and Gravel Pit 11
Sand and Gravel Pit 9
Sand Pit 8
Gravel/Borrow Pit - Undifferentiated 5
Sand Pit 3
Borrow Pit 1
Gravel/Borrow Pit - Undifferentiated 1
Other counties in MaineAll 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.