Data / Mines / California / Silva Quarry
Silva Quarry, Siskiyou County, California: 0 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Silva Quarry is an intermittent crushed, broken stone surface mine in Siskiyou County, California, operated by Shasta Valley Rock with 2 employees on MSHA's record (mine ID 0405868). Since January 1, 2022 MSHA inspectors issued 0 citations and orders there with $0 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Silva Quarry (MSHA mine ID 0405868) in Siskiyou County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405868
- Status
- Intermittent since May 5, 2013
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Siskiyou County, California
- Nearest town
- Yreka
- Operator
- Shasta Valley Rock
- Employees
- 2
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 0
- Inspections
- 5
- Inspector hours on site
- 9
- Citations per inspection
- 0.00 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- May 6, 2026
Other open mines in Siskiyou County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Moores Gravel Inc | Moore's Gravel, Inc | Siskiyou County, CA | Crushed, broken stone | 2 | 37 |
| Sousa Ready Mix | Sousa Ready Mix LLC | Siskiyou County, CA | Construction sand and gravel | 6 | 19 |
| Cci Mobile Crusher #2 | Custom Crushing Industries, Inc | Siskiyou County, CA | Crushed, broken stone | 6 | 5 |
| Portable Screen Plant | County Of Siskiyou Dept of Public Works | Siskiyou County, CA | Construction sand and gravel | 1 | 5 |
| Rebecca De Boy Mine | C & C Cinder Company, LLC | Siskiyou County, CA | Crushed, broken stone | 4 | 2 |
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.