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Abandoned mines › New Hampshire
Abandoned mine inventory

Abandoned mines in Merrimack County, New Hampshire

Merrimack County, New Hampshire has 294 mine and prospect features on USGS topographic maps published 1921–1998; 1 of the features carry a name on the map. MSHA's register carries 36 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Merrimack 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)
294
Mine openings
0
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
36
1 features carry a name0 prospect pits29 quadrangle maps, published 1921–1998 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
    14 4.8%
  2. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    280 95.2%
Named features on the maps1 named · from the USGS compilation
Name on map Feature
Garnet Mine Open Pit Mine

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.

MSHA-registered mines with status Abandoned36 on register
  1. 723-Premiertrak
    Surface metal/non-metal · DBU Construction, Inc · MSHA ID 2700533
    Abandoned
  2. Advance Siteworks LLC
    Surface metal/non-metal · Advance Siteworks LLC · MSHA ID 2700456
    Abandoned
  3. Allenstown Materials LLC
    Surface metal/non-metal · Allenstown Materials LLC · MSHA ID 2700505
    Abandoned
  4. Arrowhead Archeology North, LLC
    Surface metal/non-metal · Arrowhead Archeology North, LLC · MSHA ID 2700502
    Abandoned
  5. AUSTIN-WESTERN PORTABLE #1
    Surface metal/non-metal · Pittsfield Sand & Gravel · MSHA ID 2700343
    Abandoned
  6. Bartlett Construction
    Surface metal/non-metal · Bartlett Construction · MSHA ID 2700245
    Abandoned
  7. Belisle Quarry
    Surface metal/non-metal · Leo Belisle Granite Company · MSHA ID 2700258
    Abandoned
  8. Boot Jack Road
    Surface metal/non-metal · Jeremy Hiltz Excavating Inc · MSHA ID 2700403
    Abandoned
  9. Boscawen Sand & Gravel North
    Surface metal/non-metal · GMI Acquisition LLC · MSHA ID 2700302
    Abandoned
  10. Bow Plant Gp #3
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700129
    Abandoned
  11. Brown Lenox Portable Jaw
    Facility metal/non-metal · Mark Johnston Construction · MSHA ID 2700426
    Abandoned
  12. Commercial Street Plant
    Surface metal/non-metal · Piontkowski Enterprises LLC · MSHA ID 2700368
    Abandoned
  13. Concord Pit
    Surface metal/non-metal · Lannan Corp · MSHA ID 2700277
    Abandoned
  14. CONCORD SAND & GRAVEL INC.
    Surface metal/non-metal · Concord Sand & Gravel Inc · MSHA ID 2700267
    Abandoned
  15. DeCato Sand & Gravel
    Surface metal/non-metal · Inisfree Investments, LLC · MSHA ID 2700449
    Abandoned
  16. Gordon'S Pit
    Surface metal/non-metal · Gordon Construction Inc · MSHA ID 2700250
    Abandoned
  17. Hackett Hill Pit And Mill
    Surface metal/non-metal · Hooksett Sand & Gravel Company · MSHA ID 2700206
    Abandoned
  18. Hartl
    Surface metal/non-metal · K & B Crushing Equipment, LLC · MSHA ID 2700499
    Abandoned
  19. Heffron Materials-Div/Heffron Asphalt
    Surface metal/non-metal · Heffron Materials-Div/Heffron Asphalt Corp · MSHA ID 2700362
    Abandoned
  20. Henniker Aggregates
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700221
    Abandoned
  21. High Street Pit
    Surface metal/non-metal · Piontkowski Enterprises, LLC. · MSHA ID 2700377
    Abandoned
  22. Hooksett Pit And Plant Gp-2
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700147
    Abandoned
  23. Hooksett Quarry And Mill H5
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700174
    Abandoned
  24. Jack Wells Pit
    Surface metal/non-metal · Phelps Construction Inc · MSHA ID 2700463
    Abandoned
  25. Ladd Sand and Gravel LLC
    Surface metal/non-metal · Ladd Sand and Gravel, LLC · MSHA ID 2700479
    Abandoned
  26. Loudon Sand & Gravel
    Surface metal/non-metal · Loudon Sand & Gravel Inc · MSHA ID 2700227
    Abandoned
  27. Manchester Sand & Gravel Bow Pit
    Surface metal/non-metal · Manchester Sand, Gravel & Cement Co. Inc. · MSHA ID 2700359
    Abandoned
  28. MT WILLIAM/HENNIKER 606
    Surface metal/non-metal · C J BOLTON, INC. · MSHA ID 2700455
    Abandoned
  29. PATSFIELD SAND & GRAVEL CORP.
    Surface metal/non-metal · PATSFIELD SAND & GRAVEL CORP. · MSHA ID 2700395
    Abandoned
  30. Plourde Sand Allenstown Quarry
    Surface metal/non-metal · Plourde Sand & Gravel Company Inc · MSHA ID 2700320
    Abandoned
  31. Portable Crusher
    Surface metal/non-metal · DBU Construction Inc · MSHA ID 2700427
    Abandoned
  32. Portable Crusher
    Surface metal/non-metal · Champagne Quality Aggregates LLC · MSHA ID 2700567
    Abandoned
  33. Portable Crusher #1
    Surface metal/non-metal · Roy D Merrill · MSHA ID 2700295
    Abandoned
  34. Portable Plant
    Surface metal/non-metal · K&R Construction Co. · MSHA ID 2700544
    Abandoned
  35. PORTABLE SCREEN
    Surface metal/non-metal · Thibeault Corp Of Ne · MSHA ID 2700318
    Abandoned
  36. Warner Aggregates, LLC
    Surface metal/non-metal · Warner Aggregates, LLC · MSHA ID 2700404
    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 78
Sand Pit 63
Gravel Pit 40
Sand Pit 36
Gravel/Borrow Pit - Undifferentiated 25
Sand and Gravel Pit 20
Open Pit Mine or Quarry 11
Quarry 6
Gravel/Borrow Pit - Undifferentiated 6
Sand and Gravel Pit 5
Open Pit Mine 2
Quarry 1
Open Pit Mine 1
Other counties in New HampshireAll 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.