Data / Mines / Maine / Knox County
Mines in Knox County, Maine: 19 open mines
MSHA lists 19 open mines in Knox County, Maine, run by 12 operators and employing 41 people. Since January 1, 2022 its inspectors issued 202 citations and orders there with $49,563 in proposed penalties, and operators reported 1 injury or illness case. The operators with the most open mines are Jake Barbour, Inc.; Meklin Excavation; Ferraiolo Construction Company Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 19
- Operators
- 12
- Employees
- 41
- Intermittent
- 13
- Temporarily Idled
- 4
- Active
- 2
- Mines run by individuals, counted and not listed
- 2
- Citations and orders since January 1, 2022
- 202
- Significant and substantial
- 39 (19.3%)
- Closure orders
- 5
- High negligence or reckless
- 21
- Proposed penalties
- $49,563
- Amount paid so far
- $39,656
- Inspections
- 124
- Inspector hours on site
- 562
- Citations per inspection
- 1.63 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- November 4, 2026
Operators with the most open mines in Knox County, Maine
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 |
|---|---|---|---|---|---|
| Jake Barbour, Inc. | 7 | 14 | 46 | $6,686 | 1 |
| Meklin Excavation | 2 | 4 | 17 | $2,272 | 0 |
| Ferraiolo Construction Company Inc | 1 | 4 | 37 | $14,670 | 0 |
| Peter Overlock Inc | 1 | 3 | 37 | $8,880 | 0 |
| Arc Aggregates LLC | 1 | 4 | 13 | $2,413 | 0 |
| Mills Excavation, Inc. | 1 | 1 | 9 | $1,218 | 0 |
| Wilson Construction & Landscaping Inc | 1 | 4 | 6 | $906 | 0 |
| Pike Industries | 1 | 2 | 1 | $165 | 0 |
| Farley & Son, Inc. | 1 | 0 | 0 | $0 | 0 |
| Hagar Enterprises Inc | 1 | 1 | 0 | $0 | 0 |
Operators with the most citations in Knox County, Maine
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Jake Barbour, Inc. | 7 | 14 | 46 | $6,686 | 1 |
| Ferraiolo Construction Company Inc | 1 | 4 | 37 | $14,670 | 0 |
| Peter Overlock Inc | 1 | 3 | 37 | $8,880 | 0 |
| Meklin Excavation | 2 | 4 | 17 | $2,272 | 0 |
| Arc Aggregates LLC | 1 | 4 | 13 | $2,413 | 0 |
| Mills Excavation, Inc. | 1 | 1 | 9 | $1,218 | 0 |
| Wilson Construction & Landscaping Inc | 1 | 4 | 6 | $906 | 0 |
| Pike Industries | 1 | 2 | 1 | $165 | 0 |
| Farley & Son, Inc. | 1 | 0 | 0 | $0 | 0 |
| Hagar Enterprises Inc | 1 | 1 | 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 |
|---|---|---|---|---|---|
| Portable Pioneer Plant | Ferraiolo Construction Company Inc | Knox County, ME | Crushed, broken limestone | 4 | 37 |
| Hard Rock Quarry | Peter Overlock Inc | Knox County, ME | Construction sand and gravel | 3 | 37 |
| Pease Pit | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 0 | 15 |
| Portable Plant | Arc Aggregates LLC | Knox County, ME | Construction sand and gravel | 4 | 13 |
| Cushing Pit | Meklin Excavation | Knox County, ME | Construction sand and gravel | 2 | 9 |
| Washington Pit #2 | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 1 | 9 |
| Mills Excavation Inc. | Mills Excavation, Inc. | Knox County, ME | Crushed, broken stone | 1 | 9 |
| Thomaston Pit | Meklin Excavation | Knox County, ME | Construction sand and gravel | 2 | 8 |
| Astec Gt165df Mobile Screening Plant | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 3 | 7 |
| 341 Rock Quarry | Wilson Construction & Landscaping Inc | Knox County, ME | Crushed, broken stone | 4 | 6 |
| Astec GT165 | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 2 | 5 |
| Powerscreen Premiertrak 400X | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 3 | 4 |
| Cedarapids Crc1150s | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 3 | 3 |
| Pioneer Jaw Crusher & Metso Cone Crusher | Jake Barbour, Inc. | Knox County, ME | Construction sand and gravel | 2 | 3 |
| Pike Washington | Pike Industries | Knox County, ME | Construction sand and gravel | 2 | 1 |
| Quarry- 2 | Hagar Enterprises Inc | Knox County, ME | Construction sand and gravel | 1 | 0 |
| Nordberg CV 100 | Farley & Son, Inc. | Knox County, ME | Construction sand and gravel | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 16 | 84.2% |
| Crushed, broken stone | 2 | 10.5% |
| Crushed, broken limestone | 1 | 5.3% |
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 | 22 | 2 | $3,209 | 0 |
| 2023 | 65 | 13 | $11,546 | 1 |
| 2024 | 41 | 6 | $10,209 | 0 |
| 2025 | 49 | 10 | $13,469 | 0 |
| 2026 | 25 | 8 | $11,130 | 0 |
Standards cited most at mines in Knox County, Maine
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 50.30 | Reporting of accidents, injuries and illnesses | 34 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.23002 | Surface metal and nonmetal mines | 5 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 5 |
| 30 CFR 56.14103 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at mines in Knox County, Maine
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| No lost time, or an occupational illness | 1 |
What the accident reports at mines in Knox County, Maine describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 1 |
Equipment named in accident reports at mines in Knox County, Maine
| Equipment | Reports |
|---|---|
| Shovel | 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.