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MSHA mine register by county

Mines in Merrimack County, New Hampshire

Merrimack County, New Hampshire has 71 mines on MSHA's register: 18 active, 11 intermittent, 36 abandoned. 3 miners have died and 528 accidents have been reported at these mines between 1983 and 2026. Inspectors have issued 2,078 citations.

Every mine MSHA has registered in Merrimack County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in Merrimack County →

Mines on register
71
Active
18
Fatalities on record
3
Citations issued
2,078
0 underground · 70 surface · 1 facilities 0 coal · 71 metal and non-metal 11 intermittent 36 abandoned 528 reported accidents, 1983–2026
Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Merrimack County, New Hampshire · Population 155,018
0.1%
Mining share of county employment
$93,944
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
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MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
F L Merrill Construction Incorporated 4 3 1
Manchester Sand, Gravel & Cement Co. Inc. 3 1 0
Marcou Construction Company Inc 3 0 0
Thibeault Corporation 3 0 0
Benevento Aggregates LLC 2 1 1
Plourde Sand & Gravel Company Inc 2 1 1
Champagne Quality Aggregates LLC 2 1 0
CONTINENTAL PAVING, INC. 2 2 0
DBU Construction, Inc 2 0 0
GMI Acquisition LLC 2 1 0
Mines in Merrimack County71 on register
  1. SWENSON GRAY QUARRY
    Surface metal/non-metal · Swenson Granite Company LLC · MSHA ID 2700083
    Active
  2. Plourde Sand Hooksett Pit
    Surface metal/non-metal · Plourde Sand & Gravel Company Inc · MSHA ID 2700094
    Active
  3. LOUDON QUARRY
    Surface metal/non-metal · Benevento Aggregates LLC · MSHA ID 2700222
    Active
  4. Pembroke Sand & Gravel
    Surface metal/non-metal · F L Merrill Construction Incorporated · MSHA ID 2700332
    Active
  5. HOOKSETT GP #1
    Surface metal/non-metal · MANCHESTER SAND GRAVEL & CEMENT COMPANY INC · MSHA ID 2700062
    Active
  6. CONCORD SAND & GRAVEL
    Surface metal/non-metal · CONTINENTAL PAVING, INC. · MSHA ID 2700317
    Active
  7. HENNIKER PIT AND MILL
    Surface metal/non-metal · Henniker Sand & Gravel Company Inc · MSHA ID 2700190
    Active
  8. Boscawen Sand & Gravel
    Surface metal/non-metal · Peckham Materials Corp · MSHA ID 2700364
    Active
  9. METSO PORTABLE 6007
    Surface metal/non-metal · F L Merrill Construction Incorporated · MSHA ID 2700331
    Active
  10. Foster Materials Inc
    Surface metal/non-metal · Foster Materials Inc · MSHA ID 2700271
    Active
  11. METSO LT120
    Surface metal/non-metal · F L Merrill Construction Incorporated · MSHA ID 2700424
    Active
  12. Hooksett N H Plant
    Surface metal/non-metal · Brox Industries Inc · MSHA ID 2700274
    Active
  13. Clarke & Co. Earthworks Contractors
    Surface metal/non-metal · Clarke & Co. Earthworks Contractors · MSHA ID 2700461
    Active
  14. CR04 Metso Jaw Crusher
    Surface metal/non-metal · NorthEast Earth Mechanics, LLC · MSHA ID 2700384
    Active
  15. BOW / HOOKSETT TOWN LINE PIT
    Surface metal/non-metal · Continental Paving Inc · MSHA ID 2700306
    Active
  16. On-Spec Sand & Gravel
    Surface metal/non-metal · On-Spec Sand & Gravel, LLC · MSHA ID 2700497
    Active
  17. Champagne Quality Aggregates
    Surface metal/non-metal · Champagne Quality Aggregates LLC · MSHA ID 2700524
    Active
  18. GMI Sand Pit
    Surface metal/non-metal · GMI Acquisition LLC · MSHA ID 2700519
    Active
  19. Hooksett Crushed Stone C607
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700192
    Intermittent
  20. CONCORD SAND & GRAVEL INC.
    Surface metal/non-metal · Concord Sand & Gravel Inc · MSHA ID 2700267
    Abandoned
  21. Michie Corporation Con-Agg Pit
    Surface metal/non-metal · Michie Corporation · MSHA ID 2700257
    Intermittent
  22. Allenstown Aggregate
    Surface metal/non-metal · Thibeault Corporation · MSHA ID 2700330
    Intermittent
  23. Plourde Sand Allenstown Quarry
    Surface metal/non-metal · Plourde Sand & Gravel Company Inc · MSHA ID 2700320
    Abandoned
  24. Portable Crusher #2
    Surface metal/non-metal · Marcou Construction Company Inc · MSHA ID 2700309
    Intermittent
  25. Boscawen Sand & Gravel North
    Surface metal/non-metal · GMI Acquisition LLC · MSHA ID 2700302
    Abandoned
  26. DeCato Sand & Gravel
    Surface metal/non-metal · Inisfree Investments, LLC · MSHA ID 2700449
    Abandoned
  27. HENNIKER PIT & MILL PORTABLE CRU
    Surface metal/non-metal · Henniker Sand & Gravel Company Inc · MSHA ID 2700326
    Intermittent
  28. Portable Crusher #1
    Surface metal/non-metal · Marcou Construction Company Inc · MSHA ID 2700293
    Intermittent
  29. Boot Jack Road
    Surface metal/non-metal · Jeremy Hiltz Excavating Inc · MSHA ID 2700403
    Abandoned
  30. METSO PORTABLE 6008
    Surface metal/non-metal · F L Merrill Construction Incorporated · MSHA ID 2700503
    Intermittent
  31. PATSFIELD SAND & GRAVEL CORP.
    Surface metal/non-metal · PATSFIELD SAND & GRAVEL CORP. · MSHA ID 2700395
    Abandoned
  32. High Street Pit
    Surface metal/non-metal · Piontkowski Enterprises, LLC. · MSHA ID 2700377
    Abandoned
  33. Jack Wells Pit
    Surface metal/non-metal · Phelps Construction Inc · MSHA ID 2700463
    Abandoned
  34. Portable Crusher #3
    Surface metal/non-metal · Marcou Construction Company Inc · MSHA ID 2700373
    Intermittent
  35. Advance Siteworks LLC
    Surface metal/non-metal · Advance Siteworks LLC · MSHA ID 2700456
    Abandoned
  36. Brown Lenox Portable Jaw
    Facility metal/non-metal · Mark Johnston Construction · MSHA ID 2700426
    Abandoned
  37. Manchester Sand & Gravel Bow Pit
    Surface metal/non-metal · Manchester Sand, Gravel & Cement Co. Inc. · MSHA ID 2700359
    Abandoned
  38. PORTABLE SCREEN
    Surface metal/non-metal · Thibeault Corp Of Ne · MSHA ID 2700318
    Abandoned
  39. Heffron Materials-Div/Heffron Asphalt
    Surface metal/non-metal · Heffron Materials-Div/Heffron Asphalt Corp · MSHA ID 2700362
    Abandoned
  40. Allenstown Materials LLC
    Surface metal/non-metal · Allenstown Materials LLC · MSHA ID 2700505
    Abandoned
  41. Concord Pit
    Surface metal/non-metal · Lannan Corp · MSHA ID 2700277
    Abandoned
  42. Arrowhead Archeology North, LLC
    Surface metal/non-metal · Arrowhead Archeology North, LLC · MSHA ID 2700502
    Abandoned
  43. South danbury pit
    Surface metal/non-metal · Phelps Construction Inc. · MSHA ID 2700528
    Intermittent
  44. Loudon Sand and Gravel
    Surface metal/non-metal · Loudon Sand and Gravel · MSHA ID 2700553
    Temporarily Idled
  45. MT WILLIAM/HENNIKER 606
    Surface metal/non-metal · C J BOLTON, INC. · MSHA ID 2700455
    Abandoned
  46. Portable Plant
    Surface metal/non-metal · Town of Henniker · MSHA ID 2700556
    Temporarily Idled
  47. Commercial Street Plant
    Surface metal/non-metal · Piontkowski Enterprises LLC · MSHA ID 2700368
    Abandoned
  48. Town of Warner
    Surface metal/non-metal · Town of Warner · MSHA ID 2700555
    Temporarily Idled
  49. Portable Crusher
    Surface metal/non-metal · DBU Construction Inc · MSHA ID 2700427
    Abandoned
  50. Portable Unit #2
    Surface metal/non-metal · Big Foote Crushing LLC · MSHA ID 2700420
    Intermittent
  51. Warner Aggregates, LLC
    Surface metal/non-metal · Warner Aggregates, LLC · MSHA ID 2700404
    Abandoned
  52. Portable Plant
    Surface metal/non-metal · K&R Construction Co. · MSHA ID 2700544
    Abandoned
  53. 723-Premiertrak
    Surface metal/non-metal · DBU Construction, Inc · MSHA ID 2700533
    Abandoned
  54. AUSTIN-WESTERN PORTABLE #1
    Surface metal/non-metal · Pittsfield Sand & Gravel · MSHA ID 2700343
    Abandoned
  55. Bartlett Construction
    Surface metal/non-metal · Bartlett Construction · MSHA ID 2700245
    Abandoned
  56. Belisle Quarry
    Surface metal/non-metal · Leo Belisle Granite Company · MSHA ID 2700258
    Abandoned
  57. Bow Plant Gp #3
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700129
    Abandoned
  58. Gordon'S Pit
    Surface metal/non-metal · Gordon Construction Inc · MSHA ID 2700250
    Abandoned
  59. Hackett Hill Pit And Mill
    Surface metal/non-metal · Hooksett Sand & Gravel Company · MSHA ID 2700206
    Abandoned
  60. Hartl
    Surface metal/non-metal · K & B Crushing Equipment, LLC · MSHA ID 2700499
    Abandoned
  61. Henniker Aggregates
    Surface metal/non-metal · Pike Industries Inc · MSHA ID 2700221
    Abandoned
  62. Hooksett Pit And Plant Gp-2
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700147
    Abandoned
  63. Hooksett Quarry And Mill H5
    Surface metal/non-metal · Manchester Sand-Gravel & Cement Company Inc · MSHA ID 2700174
    Abandoned
  64. Ladd Sand and Gravel LLC
    Surface metal/non-metal · Ladd Sand and Gravel, LLC · MSHA ID 2700479
    Abandoned
  65. Loudon Sand & Gravel
    Surface metal/non-metal · Loudon Sand & Gravel Inc · MSHA ID 2700227
    Abandoned
  66. LT 105
    Surface metal/non-metal · Entire Equipment · MSHA ID 2700551
    Intermittent
  67. Metso ST 2.8 Screener
    Surface metal/non-metal · Frank DeLucia & Son Inc. · MSHA ID 2700561
    Temporarily Idled
  68. Portable Chieftain 1700
    Surface metal/non-metal · Benevento Aggregates LLC · MSHA ID 2700532
    Temporarily Idled
  69. Portable Crusher
    Surface metal/non-metal · Champagne Quality Aggregates LLC · MSHA ID 2700567
    Abandoned
  70. Portable Crusher #1
    Surface metal/non-metal · Roy D Merrill · MSHA ID 2700295
    Abandoned
  71. Thibeault corp of NE
    Surface metal/non-metal · Thibeault corp of NE · MSHA ID 2700573
    New Mine

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

Other counties in New HampshireAll counties →
How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.