Data / Mines / Nevada / Clark Operations
Clark Operations, Storey County, Nevada: 37 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Clark Operations is an active diatomaceous earth (diatomite) surface mine in Storey County, Nevada, operated by U.S. Silica Company, LLC with 62 employees on MSHA's record (mine ID 2600677). Since January 1, 2022 MSHA inspectors issued 37 citations and orders there with $10,492 in proposed penalties, and 5 accident reports were filed there, with 5 injury or illness cases.
The request: Watch Clark Operations (MSHA mine ID 2600677) in Storey County, Nevada: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2600677
- Status
- Active since July 4, 1976
- Main commodity
- Diatomaceous earth (diatomite)
- Mine type
- Surface
- County
- Storey County, Nevada
- Nearest town
- Sparks
- Operator
- U.S. Silica Company, LLC
- Parent company
- Uss Holdings Inc
- Employees
- 62
- MSHA field office
- Reno NV Field Office
- Citations and orders since January 1, 2022
- 37
- Significant and substantial
- 8 (21.6%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $10,492
- Amount paid so far
- $10,492
- Inspections
- 15
- Inspector hours on site
- 116
- Citations per inspection
- 2.47 (all mines 2.30)
- Accident reports
- 5
- Injury and illness cases
- 5
- Fatalities
- 0
- Latest MSHA record
- November 3, 2026
- Citations issued to contractors here
- 4 ($604 proposed)
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 | 11 | 3 | $2,996 | 2 |
| 2023 | 3 | 1 | $2,341 | 1 |
| 2024 | 12 | 3 | $2,114 | 2 |
| 2025 | 4 | 0 | $1,249 | 0 |
| 2026 | 7 | 1 | $1,792 | 0 |
Standards cited most at Clark Operations
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 56.12004 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.16001 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.13011 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.23003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12068 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.41 | Hazard communication | 1 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 48.27 | Training of miners | 1 |
Injury and illness cases at Clark Operations
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 4 |
| No lost time, or an occupational illness | 1 |
What the accident reports at Clark Operations describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 2 |
| Powered haulage | 1 |
| Slip or fall of person | 1 |
| Handtools (nonpowered) | 1 |
Equipment named in accident reports at Clark Operations
| Equipment | Reports |
|---|---|
| Ore haulage trucks - off highway trucks | 1 |
| Mine car | 1 |
| Hand tools (not powered) | 1 |
Other open mines in Storey County, Nevada
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Trico Pit | Gopher Construction Inc | Storey County, NV | Construction sand and gravel | 7 | 33 |
| Sierra Stone Quarry | All-Lite Materials | Storey County, NV | Construction sand and gravel | 10 | 24 |
| River Canyon III | Joy Engineering | Storey County, NV | Crushed, broken stone | 4 | 1 |
| Mustang | Joy Engineering | Storey County, NV | Construction sand and gravel | 4 | 0 |
| Long Valley Rock-Mustang Pit | Long Valley Rock, LLC | Storey County, NV | Construction sand and gravel | 3 | 0 |
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.