Data / Mines / Tennessee / Knox County
Mines in Knox County, Tennessee: 9 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 9 open mines in Knox County, Tennessee, run by 5 operators and employing 356 people. Since January 1, 2022 its inspectors issued 538 citations and orders there with $345,792 in proposed penalties, and operators reported 47 injury or illness cases, 2 of them fatal. The operators with the most open mines are Martin Marietta Southeast Agg Operations, LLC; Vulcan Construction Materials, LLC; Crucible Etn LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 9
- Operators
- 5
- Employees
- 356
- Active
- 8
- New Mine
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 538
- Significant and substantial
- 105 (19.5%)
- Closure orders
- 17
- High negligence or reckless
- 20
- Proposed penalties
- $345,792
- Amount paid so far
- $277,552
- Inspections
- 190
- Inspector hours on site
- 5,839
- Citations per inspection
- 2.83 (all mines 2.30)
- Accident reports
- 49
- Injury and illness cases
- 47
- Fatalities
- 2
- Latest MSHA record
- October 22, 2026
Operators with the most open mines in Knox County, Tennessee
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 |
|---|---|---|---|---|---|
| Martin Marietta Southeast Agg Operations, LLC | 3 | 36 | 18 | $10,659 | 5 |
| Vulcan Construction Materials, LLC | 2 | 31 | 13 | $2,237 | 6 |
| Crucible Etn LLC | 1 | 140 | 347 | $240,184 | 14 |
| Cemex Const Materials Atlantic, LLC | 1 | 147 | 159 | $92,569 | 22 |
| Walker's Rock | 1 | 2 | 1 | $143 | 0 |
Operators with the most citations in Knox County, Tennessee
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Crucible Etn LLC | 1 | 140 | 347 | $240,184 | 14 |
| Cemex Const Materials Atlantic, LLC | 1 | 147 | 159 | $92,569 | 22 |
| Martin Marietta Southeast Agg Operations, LLC | 3 | 36 | 18 | $10,659 | 5 |
| Vulcan Construction Materials, LLC | 2 | 31 | 13 | $2,237 | 6 |
| Walker's Rock | 1 | 2 | 1 | $143 | 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 |
|---|---|---|---|---|---|
| Immel Mine | Crucible Etn LLC | Knox County, TN | Zinc | 140 | 347 |
| Knoxville Cement Plant | Cemex Const Materials Atlantic, LLC | Knox County, TN | Cement | 147 | 159 |
| Forks of the River Quarry | Martin Marietta Southeast Agg Operations, LLC | Knox County, TN | Crushed, broken limestone | 16 | 9 |
| Dixie Lee Quarry | Vulcan Construction Materials, LLC | Knox County, TN | Crushed, broken limestone | 22 | 8 |
| Riverside Drive Quarry | Vulcan Construction Materials, LLC | Knox County, TN | Crushed, broken limestone | 9 | 5 |
| Midway Quarry | Martin Marietta Southeast Agg Operations, LLC | Knox County, TN | Crushed, broken limestone | 8 | 5 |
| I-75 Quarry | Martin Marietta Southeast Agg Operations, LLC | Knox County, TN | Crushed, broken limestone | 12 | 4 |
| Walker's Dirt Pit | Walker's Rock | Knox County, TN | Clay, ceramic, refractory mnls. | 2 | 1 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken limestone | 5 | 55.6% |
| Zinc | 1 | 11.1% |
| Cement | 1 | 11.1% |
| Clay, ceramic, refractory mnls. | 1 | 11.1% |
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 | 171 | 35 | $173,396 | 12 |
| 2023 | 121 | 27 | $83,543 | 13 |
| 2024 | 98 | 18 | $32,656 | 13 |
| 2025 | 95 | 17 | $38,573 | 8 |
| 2026 | 53 | 8 | $17,624 | 1 |
Standards cited most at mines in Knox County, Tennessee
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 57.14100 | Underground metal and nonmetal mines | 72 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 27 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 13 |
| 30 CFR 57.3200 | Underground metal and nonmetal mines | 11 |
| 30 CFR 57.12030 | Underground metal and nonmetal mines | 11 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 10 |
| 30 CFR 57.4104 | Underground metal and nonmetal mines | 9 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 9 |
| 30 CFR 57.5066 | Underground metal and nonmetal mines | 8 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 8 |
| 30 CFR 57.4201 | Underground metal and nonmetal mines | 7 |
| 30 CFR 57.11001 | Underground metal and nonmetal mines | 7 |
Injury and illness cases at mines in Knox County, Tennessee
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Fatality | 2 |
| Permanent disability | 3 |
| Days away from work or restricted activity | 30 |
| No lost time, or an occupational illness | 12 |
What the accident reports at mines in Knox County, Tennessee describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 13 |
| Slip or fall of person | 11 |
| Handtools (nonpowered) | 8 |
| Powered haulage | 6 |
| Other | 4 |
| Fall of face/rib/pillar/side/highwall | 2 |
| Stepping or kneeling on object | 2 |
| Fire | 1 |
| Disorders (physical agents) | 1 |
| Machinery | 1 |
Equipment named in accident reports at mines in Knox County, Tennessee
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 8 |
| Forklift | 4 |
| Ore haulage trucks - off highway trucks | 4 |
| Pneumatic blasting agent loader | 3 |
| Conveyor | 1 |
| Bulldozer | 1 |
| Front-end loader | 1 |
| Trucks | 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.