Data / Mines / Uss Holdings Inc
Uss Holdings Inc: 30 open mines, 955 MSHA citations
Uss Holdings Inc (MSHA controller ID M11007) controls 30 open mines through 2 operators, with 1,302 employees in 19 states, mostly sand, industrial. Since January 1, 2022 MSHA issued 955 citations and orders at those mines with $420,527 in proposed penalties, and operators reported 74 injury or illness cases. Data from MSHA, November 6, 2026.
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- MSHA controller ID
- M11007
- Open mines
- 30
- Operators
- 2
- Employees
- 1,302
- States
- 19
- Citations and orders since January 1, 2022
- 955
- Significant and substantial
- 137 (14.3%)
- Closure orders
- 11
- High negligence or reckless
- 49
- Proposed penalties
- $420,527
- Amount paid so far
- $385,967
- Inspections
- 461
- Inspector hours on site
- 6,238
- Citations per inspection
- 2.07 (all mines 2.30)
- Accident reports
- 82
- Injury and illness cases
- 74
- Fatalities
- 0
- Latest MSHA record
- November 4, 2026
Operators under Uss Holdings Inc
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| U.S. Silica Company, LLC | 27 | 1,150 | 794 | $352,502 | 65 |
| U.S. Silica Energy Company | 3 | 152 | 161 | $68,025 | 9 |
Mines with the most citations
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Ottawa Plant | U.S. Silica Company, LLC | La Salle County, IL | Ground silica | 124 | 209 |
| Columbia Plant | U.S. Silica Company, LLC | Lexington County, SC | Sand, industrial | 55 | 124 |
| Pacific Plant | U.S. Silica Company, LLC | St Louis County, MO | Quartz, ground | 41 | 109 |
| Crane County Plant | U.S. Silica Energy Company | Crane County, TX | Sand, industrial | 85 | 93 |
| Lamesa Plant | U.S. Silica Energy Company | Dawson County, TX | Construction sand and gravel | 65 | 61 |
| Colado Plant | U.S. Silica Company, LLC | Pershing County, NV | Diatomaceous earth (diatomite) | 140 | 42 |
| Ep Engineered Clays Corporation | U.S. Silica Company, LLC | Hinds County, MS | Clay, ceramic, refractory mnls. | 122 | 37 |
| Clark Operations | U.S. Silica Company, LLC | Storey County, NV | Diatomaceous earth (diatomite) | 62 | 37 |
| Rockwood Plant | U.S. Silica Company, LLC | Wayne County, MI | Sand, industrial | 12 | 34 |
| Mapleton Depot Plant | U.S. Silica Company, LLC | Huntingdon County, PA | Sand, industrial | 42 | 27 |
| Middleton Operations | U.S. Silica Company, LLC | Hardeman County, TN | Common clays | 90 | 25 |
| Mill Creek Plant #39 | U.S. Silica Company, LLC | Johnston County, OK | Crushed, broken sandstone | 49 | 24 |
| Berkeley Plant | U.S. Silica Company, LLC | Morgan County, WV | Ground silica | 68 | 21 |
| Mauricetown Plant | U.S. Silica Company, LLC | Cumberland County, NJ | Sand, industrial | 33 | 19 |
| Fernley Operations | U.S. Silica Company, LLC | Churchill County, NV | Diatomaceous earth (diatomite) | 57 | 17 |
| Celatom Plant | U.S. Silica Company, LLC | Malheur County, OR | Diatomaceous earth (diatomite) | 53 | 17 |
| Colado Mine | U.S. Silica Company, LLC | Pershing County, NV | Diatomaceous earth (diatomite) | 36 | 14 |
| Hurtsboro Plant | U.S. Silica Company, LLC | Russell County, AL | Construction sand and gravel | 9 | 14 |
| Mill Creek Plant #37 | U.S. Silica Company, LLC | Johnston County, OK | Sand, industrial | 23 | 8 |
| Sparta, WI Plant | U.S. Silica Energy Company | Monroe County, WI | Sand, industrial | 2 | 7 |
| Dubberly Plant | U.S. Silica Company, LLC | Webster Parish, LA | Construction sand and gravel | 15 | 6 |
| Montpelier Plant | U.S. Silica Company, LLC | Hanover County, VA | Aplite | 26 | 5 |
| Celatom Mine | U.S. Silica Company, LLC | Malheur County, OR | Diatomaceous earth (diatomite) | 17 | 2 |
| Port Elizabeth Plant | U.S. Silica Company, LLC | Cumberland County, NJ | Construction sand and gravel | 1 | 2 |
| Millen Plant | U.S. Silica Company, LLC | Jenkins County, GA | Kaolin and ball clay | 28 | 1 |
| Fowlkes Mine | U.S. Silica Company, LLC | Monroe County, MS | Bentonite | 22 | 0 |
| Jackson Plant | U.S. Silica Company, LLC | Madison County, TN | Sand, industrial | 17 | 0 |
| Pop-Corn | U.S. Silica Company, LLC | Churchill County, NV | Perlite | 5 | 0 |
| Hazen Pit | U.S. Silica Company, LLC | Churchill County, NV | Misc. nonmetallic mnls. | 3 | 0 |
| Cheto Mine | U.S. Silica Company, LLC | Apache County, AZ | Common clays | 0 | 0 |
States
| State | Open mines |
|---|---|
| Nevada | 6 |
| Mississippi | 2 |
| New Jersey | 2 |
| Oklahoma | 2 |
| Oregon | 2 |
| Tennessee | 2 |
| Texas | 2 |
| Alabama | 1 |
| Arizona | 1 |
| Georgia | 1 |
| Illinois | 1 |
| Louisiana | 1 |
| Michigan | 1 |
| Missouri | 1 |
| Pennsylvania | 1 |
| South Carolina | 1 |
| Virginia | 1 |
| West Virginia | 1 |
| Wisconsin | 1 |
Commodities
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 | 179 | 32 | $92,941 | 18 |
| 2023 | 224 | 31 | $94,554 | 14 |
| 2024 | 232 | 37 | $105,816 | 18 |
| 2025 | 186 | 20 | $91,255 | 12 |
| 2026 | 134 | 17 | $35,961 | 12 |
Standards cited most at mines controlled by Uss Holdings Inc
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 56.20003 | Surface metal and nonmetal mines | 80 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 66 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 61 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 60 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 55 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 50 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 42 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 33 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 29 |
| 30 CFR 47.41 | Hazard communication | 23 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 19 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 19 |
| 30 CFR 56.5001 | Surface metal and nonmetal mines | 18 |
Injury and illness cases at mines controlled by Uss Holdings Inc
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 5 |
| Days away from work or restricted activity | 44 |
| No lost time, or an occupational illness | 25 |
What the accident reports at mines controlled by Uss Holdings Inc describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 24 |
| Slip or fall of person | 22 |
| Machinery | 11 |
| Powered haulage | 6 |
| Handtools (nonpowered) | 5 |
| Other | 4 |
| Fire | 3 |
| Stepping or kneeling on object | 1 |
| Fall of roof or back | 1 |
| Impoundment | 1 |
Equipment named in accident reports at mines controlled by Uss Holdings Inc
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 7 |
| Hand tools (not powered) | 5 |
| Ore haulage trucks - off highway trucks | 5 |
| Front-end loader | 4 |
| Road grader | 2 |
| Mine car | 2 |
| Forklift | 2 |
| Packaging machine | 2 |
| Conveyor | 1 |
| Classifier | 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.