Data / Mines / California / Ruby Mine
Ruby Mine, Nevada County, California: 7 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Ruby Mine is an active gold ore underground mine in Nevada County, California, operated by Ruby Gold, Inc. with 2 employees on MSHA's record (mine ID 0403108). Since January 1, 2022 MSHA inspectors issued 7 citations and orders there with $1,482 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Ruby Mine (MSHA mine ID 0403108) in Nevada County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0403108
- Status
- Active since September 8, 2025
- Main commodity
- Gold ore
- Mine type
- Underground
- County
- Nevada County, California
- Nearest town
- Downieville
- Operator
- Ruby Gold, Inc.
- Parent company
- Cirrus Holdings LLC
- Employees
- 2
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 7
- Significant and substantial
- 1 (14.3%)
- Closure orders
- 2
- High negligence or reckless
- 1
- Proposed penalties
- $1,482
- Amount paid so far
- $0
- Inspections
- 6
- Inspector hours on site
- 81
- Citations per inspection
- 1.17 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- August 25, 2026
- Citations issued to contractors here
- 7 ($1,423 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 |
|---|---|---|---|---|
| 2025 | 7 | 1 | $1,482 | 0 |
Standards cited most at Ruby Mine
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 48.25 | Training of miners | 1 |
| 30 CFR 48.31 | Training of miners | 1 |
| 30 CFR 48.29 | Training of miners | 1 |
| 30 CFR 48.23 | Training of miners | 1 |
| 30 CFR 57.1000 | Underground metal and nonmetal mines | 1 |
| 30 CFR 41.20 | Notice of legal identity | 1 |
| 30 CFR 57.12028 | Underground metal and nonmetal mines | 1 |
Other open mines in Nevada County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Greenhorn Pit & Mill | Hansen Bros Enterprises | Nevada County, CA | Construction sand and gravel | 11 | 14 |
| Martis Valley Plant | Teichert Aggregates | Nevada County, CA | Construction sand and gravel | 4 | 13 |
| Ridge Rock Quarry | Hansen Bros Enterprises | Nevada County, CA | Construction sand and gravel | 2 | 13 |
| Boca Quarry | Teichert Aggregates | Nevada County, CA | Crushed, broken stone | 14 | 2 |
| Red Ledge Mine | Red Ledge Mining Company | Nevada County, CA | Gold ore | 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.