Data / Mines / California / Sierra Silica Resources
Sierra Silica Resources: 52 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Sierra Silica Resources is an active sand, industrial surface mine in Butte County, California, operated by Industrial Silica Products, LLC with 30 employees on MSHA's record (mine ID 0405879). Since January 1, 2022 MSHA inspectors issued 52 citations and orders there with $46,575 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Sierra Silica Resources (MSHA mine ID 0405879) in Butte County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405879
- Status
- Active since February 8, 2015
- Main commodity
- Sand, industrial
- Mine type
- Surface
- County
- Butte County, California
- Nearest town
- Oroville
- Operator
- Industrial Silica Products, LLC
- Employees
- 30
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 52
- Significant and substantial
- 9 (17.3%)
- Closure orders
- 2
- High negligence or reckless
- 2
- Proposed penalties
- $46,575
- Amount paid so far
- $32,682
- Inspections
- 19
- Inspector hours on site
- 132
- Citations per inspection
- 2.74 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- June 3, 2026
- Citations issued to contractors here
- 1 ($385 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 | 4 | 0 | $1,159 | 0 |
| 2023 | 26 | 6 | $41,586 | 0 |
| 2024 | 3 | 0 | $458 | 0 |
| 2025 | 8 | 0 | $1,208 | 0 |
| 2026 | 11 | 3 | $2,164 | 0 |
Standards cited most at Sierra Silica Resources
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 56.20003 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12025 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.15005 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.17001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
Other open mines in Butte County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Morris Ravine Mine | Mineral Resources LLC | Butte County, CA | Construction sand and gravel | 8 | 57 |
| Reynoso Brothers Quarry | Reynoso Brothers Construction | Butte County, CA | Sand, common | 5 | 34 |
| Wheelock Road Rock Pit | Brown General Engineering, Inc | Butte County, CA | Crushed, broken stone | 2 | 30 |
| Bangor Quarry | Bangor Aggregates LLC | Butte County, CA | Dimension traprock | 3 | 5 |
| TRP Table Mountain Plant | Triangle Rock Products | Butte County, CA | Crushed, broken stone | 19 | 2 |
| Almond Avenue Mine | Franklin Construction Inc | Butte County, CA | Construction sand and gravel | 4 | 1 |
| Little Chico Creek | Franklin Construction Inc | Butte County, CA | Crushed, broken stone | 3 | 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.