Data / Mines / Misc. nonmetallic mnls.
Misc. nonmetallic mnls. mines in the US: 22 open mines
MSHA lists 22 open misc. nonmetallic mnls. mines in the US, run by 21 operators and employing 208 people. Since January 1, 2022 its inspectors issued 589 citations and orders there with $516,501 in proposed penalties, and operators reported 39 injury or illness cases. The operators with the most open mines are Volcanic Stone Co; Gouverneur LLC; Imerys Filtration Minerals, Inc.. Data from MSHA, November 6, 2026.
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- Open mines
- 22
- Operators
- 21
- Employees
- 208
- Active
- 18
- Intermittent
- 3
- Temporarily Idled
- 1
- Mines run by individuals, counted and not listed
- 3
- Citations and orders since January 1, 2022
- 589
- Significant and substantial
- 127 (21.6%)
- Closure orders
- 41
- High negligence or reckless
- 76
- Proposed penalties
- $516,501
- Amount paid so far
- $206,122
- Inspections
- 289
- Inspector hours on site
- 2,367
- Citations per inspection
- 2.04 (all mines 2.30)
- Accident reports
- 39
- Injury and illness cases
- 39
- Fatalities
- 0
- Latest MSHA record
- October 28, 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 |
|---|---|---|---|---|---|
| Volcanic Stone Co | 1 | 2 | 102 | $376,829 | 1 |
| Gouverneur LLC | 1 | 9 | 83 | $34,007 | 4 |
| Imerys Filtration Minerals, Inc. | 1 | 42 | 67 | $29,833 | 5 |
| Asbury Advanced Materials | 1 | 50 | 50 | $13,845 | 6 |
| Menefee Mining Corp | 1 | 7 | 41 | $8,203 | 0 |
| Mesa Verde Humates, LLC | 1 | 8 | 39 | $6,003 | 2 |
| Amp Processing, LLC | 1 | 2 | 38 | $18,095 | 6 |
| Ash Grove Cement Company | 1 | 2 | 29 | $5,997 | 2 |
| Lind Marine Incorporated | 1 | 3 | 23 | $4,149 | 0 |
| St. Cloud Mining Co | 1 | 24 | 19 | $2,918 | 6 |
| Sidco Minerals Inc | 1 | 6 | 17 | $2,773 | 2 |
| Pro-Agr | 1 | 6 | 16 | $2,416 | 2 |
| Clayton's Calcium Inc | 1 | 5 | 11 | $1,653 | 0 |
| Covia Solutions LLC | 1 | 14 | 7 | $1,027 | 2 |
| Ocean View Mines LLC | 1 | 3 | 4 | $1,410 | 0 |
| Tennessee Aggregates LLC | 1 | 4 | 3 | $0 | 0 |
| Gagliarducci Construction, Inc | 1 | 1 | 2 | $294 | 0 |
| Bingham Sand & Gravel Company Inc | 1 | 1 | 1 | $147 | 0 |
| U.S. Silica Company, LLC | 1 | 3 | 0 | $0 | 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 |
|---|---|---|---|---|---|
| Volcanic Stone Co | 1 | 2 | 102 | $376,829 | 1 |
| Gouverneur LLC | 1 | 9 | 83 | $34,007 | 4 |
| Imerys Filtration Minerals, Inc. | 1 | 42 | 67 | $29,833 | 5 |
| Asbury Advanced Materials | 1 | 50 | 50 | $13,845 | 6 |
| Menefee Mining Corp | 1 | 7 | 41 | $8,203 | 0 |
| Mesa Verde Humates, LLC | 1 | 8 | 39 | $6,003 | 2 |
| Amp Processing, LLC | 1 | 2 | 38 | $18,095 | 6 |
| Ash Grove Cement Company | 1 | 2 | 29 | $5,997 | 2 |
| Lind Marine Incorporated | 1 | 3 | 23 | $4,149 | 0 |
| St. Cloud Mining Co | 1 | 24 | 19 | $2,918 | 6 |
| Sidco Minerals Inc | 1 | 6 | 17 | $2,773 | 2 |
| Pro-Agr | 1 | 6 | 16 | $2,416 | 2 |
| Clayton's Calcium Inc | 1 | 5 | 11 | $1,653 | 0 |
| Covia Solutions LLC | 1 | 14 | 7 | $1,027 | 2 |
| Ocean View Mines LLC | 1 | 3 | 4 | $1,410 | 0 |
| Tennessee Aggregates LLC | 1 | 4 | 3 | $0 | 0 |
| Gagliarducci Construction, Inc | 1 | 1 | 2 | $294 | 0 |
| Bingham Sand & Gravel Company Inc | 1 | 1 | 1 | $147 | 0 |
| U.S. Silica Company, LLC | 1 | 3 | 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 |
|---|---|---|---|---|---|
| Cinder Mountain Mine | Volcanic Stone Co | Union County, NM | Misc. nonmetallic mnls. | 2 | 102 |
| No. 4 Mine | Gouverneur LLC | Lewis County, NY | Misc. nonmetallic mnls. | 9 | 83 |
| Quincy WA Plant | Imerys Filtration Minerals, Inc. | Grant County, WA | Misc. nonmetallic mnls. | 42 | 67 |
| Asbury DeQuincy | Asbury Advanced Materials | Calcasieu Parish, LA | Misc. nonmetallic mnls. | 50 | 50 |
| Black Spring Mine | Menefee Mining Corp | Sandoval County, NM | Misc. nonmetallic mnls. | 7 | 41 |
| Mesa Verde Humates, LLC | Mesa Verde Humates, LLC | Sandoval County, NM | Misc. nonmetallic mnls. | 8 | 39 |
| Four Mile Complex | Amp Processing, LLC | Juab County, UT | Misc. nonmetallic mnls. | 2 | 38 |
| Ash Grove Tooele Plant | Ash Grove Cement Company | Tooele County, UT | Misc. nonmetallic mnls. | 2 | 29 |
| Lind Marine Incorporated | Lind Marine Incorporated | Solano County, CA | Misc. nonmetallic mnls. | 3 | 23 |
| St Cloud Surface | St. Cloud Mining Co | Sierra County, NM | Misc. nonmetallic mnls. | 24 | 19 |
| Sidco Minerals Siderite Mine | Sidco Minerals Inc | Cass County, TX | Misc. nonmetallic mnls. | 6 | 17 |
| Pro-Agr | Pro-Agr | Vermillion County, IN | Misc. nonmetallic mnls. | 6 | 16 |
| New Acers | Clayton's Calcium Inc | Payette County, ID | Misc. nonmetallic mnls. | 5 | 11 |
| Emmett Plant | Covia Solutions LLC | Gem County, ID | Misc. nonmetallic mnls. | 14 | 7 |
| Oceanview Mine | Ocean View Mines LLC | San Diego County, CA | Misc. nonmetallic mnls. | 3 | 4 |
| Erwin Stone | Tennessee Aggregates LLC | Unicoi County, TN | Misc. nonmetallic mnls. | 4 | 3 |
| MC Closkey R155 Screener # 2 | Gagliarducci Construction, Inc | Hampden County, MA | Misc. nonmetallic mnls. | 1 | 2 |
| Pioneer | Bingham Sand & Gravel Company Inc | Ottawa County, OK | Misc. nonmetallic mnls. | 1 | 1 |
| Hazen Pit | U.S. Silica Company, LLC | Churchill County, NV | Misc. nonmetallic mnls. | 3 | 0 |
States
| State | Open mines | Share |
|---|---|---|
| New Mexico | 6 | 27.3% |
| California | 2 | 9.1% |
| Idaho | 2 | 9.1% |
| Utah | 2 | 9.1% |
| Indiana | 1 | 4.5% |
| Louisiana | 1 | 4.5% |
| Massachusetts | 1 | 4.5% |
| Nevada | 1 | 4.5% |
| New York | 1 | 4.5% |
| Oklahoma | 1 | 4.5% |
| Oregon | 1 | 4.5% |
| Tennessee | 1 | 4.5% |
| Texas | 1 | 4.5% |
| Washington | 1 | 4.5% |
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 | 68 | 15 | $15,917 | 13 |
| 2023 | 85 | 12 | $15,583 | 5 |
| 2024 | 120 | 25 | $42,331 | 8 |
| 2025 | 183 | 29 | $69,507 | 6 |
| 2026 | 133 | 46 | $373,163 | 7 |
Standards cited most at misc. nonmetallic mnls. 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 56.14107 | Surface metal and nonmetal mines | 61 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 39 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 37 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 24 |
| 30 CFR 47.41 | Hazard communication | 16 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 9 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 8 |
Injury and illness cases at misc. nonmetallic mnls. mines
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 2 |
| Days away from work or restricted activity | 28 |
| No lost time, or an occupational illness | 9 |
What the accident reports at misc. nonmetallic mnls. mines describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 16 |
| Slip or fall of person | 11 |
| Machinery | 5 |
| Handtools (nonpowered) | 2 |
| Powered haulage | 2 |
| Disorders (repeated trauma) | 1 |
| Hoisting | 1 |
| Fall of roof or back | 1 |
Equipment named in accident reports at misc. nonmetallic mnls. mines
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 4 |
| Forklift | 2 |
| Front-end loader | 2 |
| Carriage-mounted drills | 2 |
| Ore haulage trucks - off highway trucks | 2 |
| Packaging machine | 2 |
| Milling machinery | 1 |
| Elevator | 1 |
| Bulldozer | 1 |
| Screen | 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.