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Abandoned mines › New Hampshire
Abandoned mine inventory

Abandoned mines in Belknap County, New Hampshire

Belknap County, New Hampshire has 108 mine and prospect features on USGS topographic maps published 1956–1987. MSHA's register carries 21 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Belknap 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)
108
Mine openings
0
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
21
0 features carry a name0 prospect pits16 quadrangle maps, published 1956–1987 0 MSHA mines abandoned and sealed
What the features are
  1. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    108 100.0%
MSHA-registered mines with status Abandoned21 on register
  1. 4 D EARTH PRODUCTS
    Surface metal/non-metal · 4 D Earth Products · MSHA ID 2700314
    Abandoned
  2. A. E. MITCHELL CORPORATION PIT
    Surface metal/non-metal · A E Mitchell Corp · MSHA ID 2700327
    Abandoned
  3. Belmont N H Plant
    Surface metal/non-metal · Brox Paving Materials Inc · MSHA ID 2700208
    Abandoned
  4. Belmont Plant
    Surface metal/non-metal · Province S & G · MSHA ID 2700264
    Abandoned
  5. Granite State Aggregate
    Surface metal/non-metal · Tri-State Asphalt Corp. · MSHA ID 2700413
    Abandoned
  6. H B Incorporated
    Surface metal/non-metal · Howe Brothers Inc · MSHA ID 2700269
    Abandoned
  7. Hiltz Pit
    Surface metal/non-metal · Hiltz Construcion Inc · MSHA ID 2700244
    Abandoned
  8. Johnston Land Clearing & Logging
    Surface metal/non-metal · Johnston Land Clearing & Logging · MSHA ID 2700378
    Abandoned
  9. New Hampton Pit And Mill
    Surface metal/non-metal · Earth Inc · MSHA ID 2700209
    Abandoned
  10. Portable Crusher C610
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700292
    Abandoned
  11. Portable Read Screen
    Surface metal/non-metal · Pike Industries, Inc. · MSHA ID 2700477
    Abandoned
  12. PORTABLE SAND SCREEN (C-606)
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700350
    Abandoned
  13. Portable Sand Screen C659
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700276
    Abandoned
  14. Portable Sand Screen X712
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700275
    Abandoned
  15. Portable Sand Screen X714
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700273
    Abandoned
  16. Portable Sandscreen C650
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700305
    Abandoned
  17. PORTABLE SANDSCREEN C657
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 1700621
    Abandoned
  18. PORTABLE SCREEN
    Surface metal/non-metal · R S H Landscapes Inc · MSHA ID 2700352
    Abandoned
  19. Sam Clark Rd./Welch Rd. Pit
    Surface metal/non-metal · NorthEast Earth Mechanics, Inc. · MSHA ID 2700335
    Abandoned
  20. The J Jeddrey LLC Plant 1
    Surface metal/non-metal · The J Jeddrey LLC · MSHA ID 2700370
    Abandoned
  21. TILTON SAND & GRAVEL (C613)
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700069
    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
Sand Pit 61
Sand Pit 24
Gravel Pit 13
Gravel Pit 4
Sand and Gravel Pit 3
Gravel/Borrow Pit - Undifferentiated 2
Quarry 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.