Data / Mines / New Hampshire / Merrimack County
Mines in Merrimack County, New Hampshire: 35 open mines
MSHA lists 35 open mines in Merrimack County, New Hampshire, run by 25 operators and employing 191 people. Since January 1, 2022 its inspectors issued 330 citations and orders there with $89,473 in proposed penalties, and operators reported 44 injury or illness cases. The operators with the most open mines are F L Merrill Construction Incorporated; Continental Paving Inc; Peckham Materials Corp. Data from MSHA, November 6, 2026.
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- Open mines
- 35
- Operators
- 25
- Employees
- 191
- Active
- 17
- Intermittent
- 12
- Temporarily Idled
- 6
- Mines run by individuals, counted and not listed
- 3
- Citations and orders since January 1, 2022
- 330
- Significant and substantial
- 59 (17.9%)
- Closure orders
- 15
- High negligence or reckless
- 13
- Proposed penalties
- $89,473
- Amount paid so far
- $78,889
- Inspections
- 252
- Inspector hours on site
- 1,527
- Citations per inspection
- 1.31 (all mines 2.30)
- Accident reports
- 44
- Injury and illness cases
- 44
- Fatalities
- 0
- Latest MSHA record
- October 16, 2026
Operators with the most open mines in Merrimack County, New Hampshire
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| F L Merrill Construction Incorporated | 4 | 13 | 49 | $10,475 | 2 |
| Continental Paving Inc | 2 | 9 | 45 | $12,055 | 1 |
| Peckham Materials Corp | 2 | 18 | 29 | $5,646 | 1 |
| Benevento Aggregates LLC | 2 | 14 | 26 | $4,767 | 2 |
| Thibeault Corp Of Ne | 2 | 3 | 15 | $2,398 | 0 |
| Henniker Sand & Gravel Company Inc | 2 | 11 | 12 | $1,745 | 0 |
| Marcou Construction Company Inc | 2 | 10 | 1 | $147 | 1 |
| Swensen Granite Company LLC | 1 | 31 | 43 | $35,860 | 36 |
| Plourde Sand & Gravel Company Inc | 1 | 20 | 18 | $2,744 | 0 |
| Foster Materials Inc | 1 | 4 | 14 | $2,048 | 0 |
| Champagne Quality Aggregates LLC | 1 | 3 | 10 | $1,395 | 0 |
| Snook's Mobile Screening LLC | 1 | 2 | 9 | $1,319 | 0 |
| On-Spec Sand & Gravel, LLC | 1 | 1 | 8 | $1,156 | 0 |
| Phelps Construction Inc | 1 | 1 | 7 | $1,237 | 0 |
| Loudon Sand and Gravel | 1 | 8 | 6 | $917 | 0 |
| Town of Henniker | 1 | 0 | 6 | $886 | 0 |
| Manchester Sand Gravel & Cement Company Inc | 1 | 3 | 5 | $686 | 0 |
| Town of Warner | 1 | 3 | 5 | $769 | 0 |
| Michie Corporation | 1 | 6 | 4 | $580 | 1 |
| Pike Industries | 1 | 14 | 4 | $580 | 0 |
| Brox Industries Incorporated | 1 | 4 | 3 | $445 | 0 |
| Big Foote Crushing LLC | 1 | 4 | 2 | $302 | 0 |
| Frank DeLucia & Son Inc. | 1 | 4 | 0 | $0 | 0 |
Operators with the most citations in Merrimack County, New Hampshire
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| F L Merrill Construction Incorporated | 4 | 13 | 49 | $10,475 | 2 |
| Continental Paving Inc | 2 | 9 | 45 | $12,055 | 1 |
| Swensen Granite Company LLC | 1 | 31 | 43 | $35,860 | 36 |
| Peckham Materials Corp | 2 | 18 | 29 | $5,646 | 1 |
| Benevento Aggregates LLC | 2 | 14 | 26 | $4,767 | 2 |
| Plourde Sand & Gravel Company Inc | 1 | 20 | 18 | $2,744 | 0 |
| Thibeault Corp Of Ne | 2 | 3 | 15 | $2,398 | 0 |
| Foster Materials Inc | 1 | 4 | 14 | $2,048 | 0 |
| Henniker Sand & Gravel Company Inc | 2 | 11 | 12 | $1,745 | 0 |
| Champagne Quality Aggregates LLC | 1 | 3 | 10 | $1,395 | 0 |
| Snook's Mobile Screening LLC | 1 | 2 | 9 | $1,319 | 0 |
| On-Spec Sand & Gravel, LLC | 1 | 1 | 8 | $1,156 | 0 |
| Phelps Construction Inc | 1 | 1 | 7 | $1,237 | 0 |
| Loudon Sand and Gravel | 1 | 8 | 6 | $917 | 0 |
| Town of Henniker | 1 | 0 | 6 | $886 | 0 |
| Manchester Sand Gravel & Cement Company Inc | 1 | 3 | 5 | $686 | 0 |
| Town of Warner | 1 | 3 | 5 | $769 | 0 |
| Michie Corporation | 1 | 6 | 4 | $580 | 1 |
| Pike Industries | 1 | 14 | 4 | $580 | 0 |
| Brox Industries Incorporated | 1 | 4 | 3 | $445 | 0 |
| Big Foote Crushing LLC | 1 | 4 | 2 | $302 | 0 |
| Marcou Construction Company Inc | 2 | 10 | 1 | $147 | 1 |
| Frank DeLucia & Son Inc. | 1 | 4 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Swenson Gray Quarry | Swensen Granite Company LLC | Merrimack County, NH | Dimension stone | 31 | 43 |
| Concord Sand & Gravel | Continental Paving Inc | Merrimack County, NH | Construction sand and gravel | 7 | 37 |
| Loudon Quarry | Benevento Aggregates LLC | Merrimack County, NH | Construction sand and gravel | 14 | 26 |
| Boscawen Sand & Gravel | Peckham Materials Corp | Merrimack County, NH | Crushed, broken granite | 15 | 24 |
| Metso Portable 6008 | F L Merrill Construction Incorporated | Merrimack County, NH | Construction sand and gravel | 3 | 20 |
| Plourde Sand Hooksett Pit | Plourde Sand & Gravel Company Inc | Merrimack County, NH | Construction sand and gravel | 20 | 18 |
| Allenstown Aggregate | Thibeault Corp Of Ne | Merrimack County, NH | Crushed, broken granite | 3 | 15 |
| Metso LT120 | F L Merrill Construction Incorporated | Merrimack County, NH | Crushed, broken stone | 5 | 14 |
| Foster Materials Inc | Foster Materials Inc | Merrimack County, NH | Construction sand and gravel | 4 | 14 |
| Champagne Quality Aggregates | Champagne Quality Aggregates LLC | Merrimack County, NH | Construction sand and gravel | 3 | 10 |
| Pembroke Sand & Gravel | F L Merrill Construction Incorporated | Merrimack County, NH | Construction sand and gravel | 2 | 9 |
| Kpi 2650 | Snook's Mobile Screening LLC | Merrimack County, NH | Construction sand and gravel | 2 | 9 |
| Bow / Hooksett Town Line Pit | Continental Paving Inc | Merrimack County, NH | Construction sand and gravel | 2 | 8 |
| On-Spec Sand & Gravel | On-Spec Sand & Gravel, LLC | Merrimack County, NH | Construction sand and gravel | 1 | 8 |
| Henniker Pit and Mill | Henniker Sand & Gravel Company Inc | Merrimack County, NH | Construction sand and gravel | 8 | 7 |
| South Danbury Pit | Phelps Construction Inc | Merrimack County, NH | Construction sand and gravel | 1 | 7 |
| Loudon Sand and Gravel | Loudon Sand and Gravel | Merrimack County, NH | Construction sand and gravel | 8 | 6 |
| Metso Portable 6007 | F L Merrill Construction Incorporated | Merrimack County, NH | Construction sand and gravel | 3 | 6 |
| Portable Plant | Town of Henniker | Merrimack County, NH | Construction sand and gravel | 0 | 6 |
| Hooksett GP #1 | Manchester Sand Gravel & Cement Company Inc | Merrimack County, NH | Construction sand and gravel | 3 | 5 |
| Henniker Pit & Mill Portable Cru | Henniker Sand & Gravel Company Inc | Merrimack County, NH | Construction sand and gravel | 3 | 5 |
| Gmi Sand Pit | Peckham Materials Corp | Merrimack County, NH | Construction sand and gravel | 3 | 5 |
| Town of Warner | Town of Warner | Merrimack County, NH | Construction sand and gravel | 3 | 5 |
| Hooksett Crushed Stone C607 | Pike Industries | Merrimack County, NH | Crushed, broken stone | 14 | 4 |
| Michie Corporation Con-Agg Pit | Michie Corporation | Merrimack County, NH | Construction sand and gravel | 6 | 4 |
| Hooksett N H Plant | Brox Industries Incorporated | Merrimack County, NH | Construction sand and gravel | 4 | 3 |
| Portable Unit #2 | Big Foote Crushing LLC | Merrimack County, NH | Construction sand and gravel | 4 | 2 |
| Portable Crusher #2 | Marcou Construction Company Inc | Merrimack County, NH | Crushed, broken sandstone | 6 | 1 |
| Portable Crusher #3 | Marcou Construction Company Inc | Merrimack County, NH | Crushed, broken granite | 4 | 0 |
| Metso ST 2.8 Screener | Frank DeLucia & Son Inc. | Merrimack County, NH | Crushed, broken stone | 4 | 0 |
| Portable Chieftain 1700 | Benevento Aggregates LLC | Merrimack County, NH | Construction sand and gravel | 0 | 0 |
| Thibeault Corp of NE | Thibeault Corp Of Ne | Merrimack County, NH | Crushed, broken limestone | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 25 | 71.4% |
| Crushed, broken stone | 4 | 11.4% |
| Crushed, broken granite | 3 | 8.6% |
| Dimension stone | 1 | 2.9% |
| Crushed, broken sandstone | 1 | 2.9% |
| Crushed, broken limestone | 1 | 2.9% |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 67 | 14 | $10,569 | 14 |
| 2023 | 82 | 16 | $22,242 | 9 |
| 2024 | 85 | 11 | $15,231 | 12 |
| 2025 | 45 | 5 | $14,089 | 6 |
| 2026 | 51 | 13 | $27,342 | 3 |
Standards cited most at mines in Merrimack County, New Hampshire
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 21 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 20 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 16 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 10 |
| 30 CFR 47.41 | Hazard communication | 9 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.23002 | Surface metal and nonmetal mines | 6 |
Injury and illness cases at mines in Merrimack County, New Hampshire
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 31 |
| No lost time, or an occupational illness | 13 |
What the accident reports at mines in Merrimack County, New Hampshire describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 25 |
| Handtools (nonpowered) | 4 |
| Powered haulage | 4 |
| Slip or fall of person | 4 |
| Machinery | 3 |
| Other | 2 |
| Dust disease of lungs | 1 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at mines in Merrimack County, New Hampshire
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 4 |
| Conveyor | 4 |
| Crane | 2 |
| Front-end loader | 2 |
| Crusher | 2 |
| Hoist | 1 |
| Dimension stone machinery | 1 |
| Shovel | 1 |
| Ore haulage trucks - off highway trucks | 1 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.