Data / Mines / California / Hidden Canyon Quarry
Hidden Canyon Quarry: 43 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Hidden Canyon Quarry is an active construction sand and gravel surface mine in Monterey County, California, operated by San Benito Supply with 5 employees on MSHA's record (mine ID 0405653). Since January 1, 2022 MSHA inspectors issued 43 citations and orders there with $21,272 in proposed penalties, and 8 accident reports were filed there, with 8 injury or illness cases.
The request: Watch Hidden Canyon Quarry (MSHA mine ID 0405653) in Monterey County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405653
- Status
- Active since August 6, 2014
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Monterey County, California
- Nearest town
- Greenfield
- Operator
- San Benito Supply
- Employees
- 5
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 43
- Significant and substantial
- 10 (23.3%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $21,272
- Amount paid so far
- $12,662
- Inspections
- 20
- Inspector hours on site
- 126
- Citations per inspection
- 2.15 (all mines 2.30)
- Accident reports
- 8
- Injury and illness cases
- 8
- Fatalities
- 0
- Latest MSHA record
- October 19, 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 | 11 | 3 | $2,126 | 2 |
| 2023 | 6 | 0 | $858 | 3 |
| 2024 | 14 | 5 | $4,091 | 0 |
| 2025 | 8 | 2 | $13,593 | 1 |
| 2026 | 4 | 0 | $604 | 2 |
Standards cited most at Hidden Canyon 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 56.14100 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4230 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4102 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12023 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Hidden Canyon Quarry
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 5 |
| No lost time, or an occupational illness | 3 |
What the accident reports at Hidden Canyon Quarry describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 3 |
| Machinery | 2 |
| Slip or fall of person | 2 |
| Handtools (nonpowered) | 1 |
Equipment named in accident reports at Hidden Canyon Quarry
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 2 |
| Bulldozer | 1 |
| Crusher | 1 |
Other open mines in Monterey County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Natividad Plant | Martin Marietta Materials, Inc. | Monterey County, CA | Crushed, broken limestone | 72 | 95 |
| Clark Pit | Wm J Clark Trucking Service Inc | Monterey County, CA | Construction sand and gravel | 3 | 37 |
| Marina Landfill | Don Chapin Company Inc | Monterey County, CA | Sand, industrial | 9 | 11 |
| Handley Ranch Quarry | Granite Construction Company | Monterey County, CA | Crushed, broken stone | 7 | 4 |
| Pine Canyon Quarry | Don Chapin Company Inc | Monterey County, CA | Construction sand and gravel | 3 | 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.