Data / Mines / Crushed, broken slate
Crushed, broken slate mines in the US: 15 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 15 open crushed, broken slate mines in the US, run by 15 operators and employing 85 people. Since January 1, 2022 its inspectors issued 153 citations and orders there with $41,204 in proposed penalties, and operators reported 7 injury or illness cases. The operators with the most open mines are CertainTeed; Southern Red Rock LLC; Chili Bar LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 15
- Operators
- 15
- Employees
- 85
- Active
- 11
- Intermittent
- 3
- Temporarily Idled
- 1
- Mines run by individuals, counted and not listed
- 2
- Citations and orders since January 1, 2022
- 153
- Significant and substantial
- 25 (16.3%)
- Closure orders
- 2
- High negligence or reckless
- 14
- Proposed penalties
- $41,204
- Amount paid so far
- $40,725
- Inspections
- 154
- Inspector hours on site
- 1,254
- Citations per inspection
- 0.99 (all mines 2.30)
- Accident reports
- 7
- Injury and illness cases
- 7
- Fatalities
- 0
- Latest MSHA record
- October 15, 2026
Operators with the most open mines
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 |
|---|---|---|---|---|---|
| CertainTeed | 1 | 20 | 22 | $3,344 | 0 |
| Southern Red Rock LLC | 1 | 4 | 16 | $15,820 | 1 |
| Chili Bar LLC | 1 | 4 | 14 | $2,056 | 0 |
| General Shale Brick, Inc. | 1 | 4 | 13 | $1,944 | 0 |
| Rockmart Slate Corp | 1 | 5 | 11 | $1,708 | 0 |
| Mc Cullough Crushing Inc | 1 | 2 | 10 | $4,594 | 0 |
| Liberty Stone & Aggregates-Clinton Quarry | 1 | 0 | 9 | $1,538 | 5 |
| Browns Quarried Slate Products Inc | 1 | 2 | 6 | $915 | 0 |
| Chesapeake Materials (division/Luck Stone Corp.) | 1 | 9 | 6 | $1,406 | 0 |
| Crimson Stone | 1 | 5 | 6 | $842 | 0 |
| Hadeka Stone Corporation | 1 | 2 | 6 | $876 | 0 |
| Georgia Stone Products, LLC | 1 | 12 | 4 | $560 | 1 |
| Glen-Gery Corporation | 1 | 2 | 1 | $147 | 0 |
Operators with the most citations
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| CertainTeed | 1 | 20 | 22 | $3,344 | 0 |
| Southern Red Rock LLC | 1 | 4 | 16 | $15,820 | 1 |
| Chili Bar LLC | 1 | 4 | 14 | $2,056 | 0 |
| General Shale Brick, Inc. | 1 | 4 | 13 | $1,944 | 0 |
| Rockmart Slate Corp | 1 | 5 | 11 | $1,708 | 0 |
| Mc Cullough Crushing Inc | 1 | 2 | 10 | $4,594 | 0 |
| Liberty Stone & Aggregates-Clinton Quarry | 1 | 0 | 9 | $1,538 | 5 |
| Browns Quarried Slate Products Inc | 1 | 2 | 6 | $915 | 0 |
| Chesapeake Materials (division/Luck Stone Corp.) | 1 | 9 | 6 | $1,406 | 0 |
| Crimson Stone | 1 | 5 | 6 | $842 | 0 |
| Hadeka Stone Corporation | 1 | 2 | 6 | $876 | 0 |
| Georgia Stone Products, LLC | 1 | 12 | 4 | $560 | 1 |
| Glen-Gery Corporation | 1 | 2 | 1 | $147 | 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 |
|---|---|---|---|---|---|
| Glenwood Quarry | CertainTeed | Montgomery County, AR | Crushed, broken slate | 20 | 22 |
| Southern Red Rock, LLC | Southern Red Rock LLC | Jefferson County, AL | Crushed, broken slate | 4 | 16 |
| Chili Bar Slate | Chili Bar LLC | El Dorado County, CA | Crushed, broken slate | 4 | 14 |
| The Watsontown Brick CO. Quarry | General Shale Brick, Inc. | Northumberland County, PA | Crushed, broken slate | 4 | 13 |
| Blue Hole Quarry | Rockmart Slate Corp | Polk County, GA | Crushed, broken slate | 5 | 11 |
| McBro Quarry | Mc Cullough Crushing Inc | Washington County, VT | Crushed, broken slate | 2 | 10 |
| Liberty Stone & Aggregates-Clinton | Liberty Stone & Aggregates-Clinton Quarry | Hunterdon County, NJ | Crushed, broken slate | 0 | 9 |
| Eden Plant | Chesapeake Materials (division/Luck Stone Corp.) | Pittsylvania County, VA | Crushed, broken slate | 9 | 6 |
| Crimson Stone | Crimson Stone | Jefferson County, AL | Crushed, broken slate | 5 | 6 |
| Hadeka Stone Corporation | Hadeka Stone Corporation | Rutland County, VT | Crushed, broken slate | 2 | 6 |
| Browns Quarry | Browns Quarried Slate Products Inc | Rutland County, VT | Crushed, broken slate | 2 | 6 |
| Boxley Arvonia Quarry | Georgia Stone Products, LLC | Buckingham County, VA | Crushed, broken slate | 12 | 4 |
| Mid-Atlantic Quarry | Glen-Gery Corporation | Berks County, PA | Crushed, broken slate | 2 | 1 |
States
| State | Open mines | Share |
|---|---|---|
| Pennsylvania | 3 | 20% |
| Vermont | 3 | 20% |
| Alabama | 2 | 13.3% |
| California | 2 | 13.3% |
| Virginia | 2 | 13.3% |
| Arkansas | 1 | 6.7% |
| Georgia | 1 | 6.7% |
| New Jersey | 1 | 6.7% |
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 | 21 | 3 | $3,449 | 2 |
| 2023 | 33 | 3 | $4,975 | 1 |
| 2024 | 44 | 12 | $20,327 | 3 |
| 2025 | 37 | 4 | $9,651 | 1 |
| 2026 | 18 | 3 | $2,802 | 0 |
Standards cited most at crushed, broken slate mines
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 | 19 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 6 |
| 30 CFR 47.41 | Hazard communication | 5 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 3 |
Injury and illness cases at crushed, broken slate mines
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 5 |
| No lost time, or an occupational illness | 2 |
What the accident reports at crushed, broken slate mines describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 3 |
| Slip or fall of person | 1 |
| Striking or bumping | 1 |
| Handtools (nonpowered) | 1 |
| Powered haulage | 1 |
Equipment named in accident reports at crushed, broken slate mines
| Equipment | Reports |
|---|---|
| Screen | 2 |
| Ore haulage trucks - off highway trucks | 1 |
| Bulldozer | 1 |
| Hand tools (not powered) | 1 |
| Air compressor | 1 |
| Carriage-mounted drills | 1 |
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.