Data / Mines / California / Napa Quarry
Napa Quarry, Napa County, California: 7 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Napa Quarry is an active sand, industrial surface mine in Napa County, California, operated by CalMat Co with 50 employees on MSHA's record (mine ID 0400023). Since January 1, 2022 MSHA inspectors issued 7 citations and orders there with $1,005 in proposed penalties, and 3 accident reports were filed there, with 3 injury or illness cases.
The request: Watch Napa Quarry (MSHA mine ID 0400023) in Napa County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0400023
- Status
- Active since March 6, 2024
- Main commodity
- Sand, industrial
- Mine type
- Surface
- County
- Napa County, California
- Nearest town
- Napa
- Operator
- CalMat Co
- Parent company
- Vulcan Materials Company
- Employees
- 50
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 7
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $1,005
- Amount paid so far
- $1,005
- Inspections
- 14
- Inspector hours on site
- 81
- Citations per inspection
- 0.50 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 3
- Fatalities
- 0
- Latest MSHA record
- October 8, 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 |
|---|---|---|---|---|
| 2022 | 5 | 0 | $711 | 0 |
| 2024 | 2 | 0 | $294 | 0 |
| 2025 | 0 | 0 | $0 | 1 |
| 2026 | 0 | 0 | $0 | 2 |
Standards cited most at Napa 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 56.4102 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.54 | Hazard communication | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 47.41 | Hazard communication | 1 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Napa Quarry
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 3 |
What the accident reports at Napa Quarry describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 1 |
| Handling of materials | 1 |
| Machinery | 1 |
Equipment named in accident reports at Napa Quarry
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Bulldozer | 1 |
| Hand tools (powered) | 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.