Data / Mines / California / Boca Quarry
Boca Quarry, Nevada County, California: 2 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Boca Quarry is an intermittent crushed, broken stone surface mine in Nevada County, California, operated by Teichert Aggregates with 14 employees on MSHA's record (mine ID 0404708). Since January 1, 2022 MSHA inspectors issued 2 citations and orders there with $298 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Boca Quarry (MSHA mine ID 0404708) 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
- 0404708
- Status
- Intermittent since May 19, 2024
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Nevada County, California
- Nearest town
- Truckee
- Operator
- Teichert Aggregates
- Parent company
- Teichert Inc
- Employees
- 14
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 2
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $298
- Amount paid so far
- $298
- Inspections
- 5
- Inspector hours on site
- 25
- Citations per inspection
- 0.40 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- July 16, 2026
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 |
|---|---|---|---|---|
| 2024 | 1 | 0 | $147 | 0 |
| 2025 | 1 | 0 | $151 | 0 |
Standards cited most at Boca Quarry
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 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.20011 | Surface 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 |
| Ruby Mine | Ruby Gold, Inc. | Nevada County, CA | Gold ore | 2 | 7 |
| 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.