Data / Mines / Oregon / Malheur County
Mines in Malheur County, Oregon: 8 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 8 open mines in Malheur County, Oregon, run by 7 operators and employing 91 people. Since January 1, 2022 its inspectors issued 74 citations and orders there with $15,300 in proposed penalties, and operators reported 6 injury or illness cases, 1 of them fatal. The operators with the most open mines are U.S. Silica Company, LLC; Pure Mountain LLC; Seubert Excavators Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 8
- Operators
- 7
- Employees
- 91
- Intermittent
- 4
- Active
- 3
- Temporarily Idled
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 74
- Significant and substantial
- 13 (17.6%)
- Closure orders
- 1
- High negligence or reckless
- 4
- Proposed penalties
- $15,300
- Amount paid so far
- $9,255
- Inspections
- 65
- Inspector hours on site
- 370
- Citations per inspection
- 1.14 (all mines 2.30)
- Accident reports
- 6
- Injury and illness cases
- 6
- Fatalities
- 1
- Latest MSHA record
- October 23, 2026
Operators with the most open mines in Malheur County, Oregon
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 |
|---|---|---|---|---|---|
| U.S. Silica Company, LLC | 2 | 70 | 19 | $2,790 | 3 |
| Pure Mountain LLC | 1 | 3 | 19 | $6,996 | 0 |
| Seubert Excavators Inc | 1 | 8 | 18 | $2,814 | 2 |
| Ironhead Inc | 1 | 2 | 6 | $876 | 0 |
| Clearwater Concrete Inc | 1 | 2 | 4 | $574 | 0 |
| Steve's Backhoe Service Inc. | 1 | 0 | 0 | $0 | 0 |
Operators with the most citations in Malheur County, Oregon
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| U.S. Silica Company, LLC | 2 | 70 | 19 | $2,790 | 3 |
| Pure Mountain LLC | 1 | 3 | 19 | $6,996 | 0 |
| Seubert Excavators Inc | 1 | 8 | 18 | $2,814 | 2 |
| Ironhead Inc | 1 | 2 | 6 | $876 | 0 |
| Clearwater Concrete Inc | 1 | 2 | 4 | $574 | 0 |
| Steve's Backhoe Service Inc. | 1 | 0 | 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 |
|---|---|---|---|---|---|
| De-source | Pure Mountain LLC | Malheur County, OR | Diatomaceous earth (diatomite) | 3 | 19 |
| Portable Crusher #1 | Seubert Excavators Inc | Malheur County, OR | Crushed, broken stone | 8 | 18 |
| Celatom Plant | U.S. Silica Company, LLC | Malheur County, OR | Diatomaceous earth (diatomite) | 53 | 17 |
| Ironhead Pit | Ironhead Inc | Malheur County, OR | Construction sand and gravel | 2 | 6 |
| Cci, Ontario Wash Plant | Clearwater Concrete Inc | Malheur County, OR | Construction sand and gravel | 2 | 4 |
| Celatom Mine | U.S. Silica Company, LLC | Malheur County, OR | Diatomaceous earth (diatomite) | 17 | 2 |
| SBS Sand and Gravel | Steve's Backhoe Service Inc. | Malheur County, OR | Construction sand and gravel | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Diatomaceous earth (diatomite) | 3 | 37.5% |
| Construction sand and gravel | 3 | 37.5% |
| Misc. nonmetallic mnls. | 1 | 12.5% |
| Crushed, broken stone | 1 | 12.5% |
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 | 12 | 0 | $1,596 | 1 |
| 2023 | 10 | 1 | $1,430 | 1 |
| 2024 | 19 | 3 | $2,907 | 0 |
| 2025 | 14 | 2 | $2,718 | 2 |
| 2026 | 19 | 7 | $6,649 | 2 |
Standards cited most at mines in Malheur County, Oregon
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 | 8 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 8 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 4 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 3 |
| 30 CFR 47.41 | Hazard communication | 3 |
| 30 CFR 47.44 | Hazard communication | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14205 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12013 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.23003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at mines in Malheur County, Oregon
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Fatality | 1 |
| Days away from work or restricted activity | 3 |
| No lost time, or an occupational illness | 2 |
What the accident reports at mines in Malheur County, Oregon describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 3 |
| Striking or bumping | 1 |
| Exploding vessels under pressure | 1 |
| Slip or fall of person | 1 |
Equipment named in accident reports at mines in Malheur County, Oregon
| Equipment | Reports |
|---|---|
| Machine | 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.