Data / Mines / California / Humboldt Quarries
Humboldt Quarries: 1 MSHA citation
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Humboldt Quarries is an intermittent construction sand and gravel surface mine in Humboldt County, California, operated by County Of Humboldt with 2 employees on MSHA's record (mine ID 0402714). Since January 1, 2022 MSHA inspectors issued 1 citation and orders there with $133 in proposed penalties, and 2 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Humboldt Quarries (MSHA mine ID 0402714) in Humboldt County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0402714
- Status
- Intermittent since May 21, 2016
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Humboldt County, California
- Nearest town
- Eureka
- Operator
- County Of Humboldt
- Parent company
- Humboldt County-CA
- Employees
- 2
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 1
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $133
- Amount paid so far
- $133
- Inspections
- 6
- Inspector hours on site
- 11
- Citations per inspection
- 0.17 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- July 14, 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 | 1 | 0 | $133 | 2 |
Standards cited most at Humboldt Quarries
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 56.11012 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Humboldt Quarries
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| No lost time, or an occupational illness | 2 |
What the accident reports at Humboldt Quarries describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 1 |
| Handling of materials | 1 |
Equipment named in accident reports at Humboldt Quarries
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
Other open mines in Humboldt County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Hoopa Valley Tribe Roads Department | Hoopa Roads Aggregate and Ready Mix | Humboldt County, CA | Construction sand and gravel | 4 | 74 |
| Willow Creek Portable Crusher | Mercer Fraser Company | Humboldt County, CA | Dimension stone | 6 | 23 |
| Hatchery Road Crusher | Kernen Construction | Humboldt County, CA | Construction sand and gravel | 3 | 23 |
| Christie Bar | Eureka Sand & Gravel Co. Inc. | Humboldt County, CA | Construction sand and gravel | 4 | 14 |
| Bear Butte Quarry | Kernen Construction | Humboldt County, CA | Crushed, broken stone | 2 | 13 |
| Portable #1 | Mercer Fraser Company | Humboldt County, CA | Construction sand and gravel | 2 | 13 |
| Ford Quarries | Kernen Construction | Humboldt County, CA | Crushed, broken stone | 1 | 12 |
| Alton Pit & Mill | Eureka Sand & Gravel Co. Inc. | Humboldt County, CA | Construction sand and gravel | 3 | 10 |
| Bridgeville Quarry | Mercer Fraser Company | Humboldt County, CA | Crushed, broken stone | 4 | 9 |
| Wahlund Construction, Inc. | Wahlund Construction, Inc. | Humboldt County, CA | Construction sand and gravel | 4 | 7 |
| Mercer Fraser Plant B Portable Crusher | Mercer Fraser Company | Humboldt County, CA | Construction sand and gravel | 4 | 6 |
| Extec | Kernen Construction | Humboldt County, CA | Construction sand and gravel | 2 | 6 |
| Roads Extec Crusher | Humboldt Redwood Company LLC | Humboldt County, CA | Construction sand and gravel | 6 | 5 |
| El Jay Cone | Humboldt Redwood Company LLC | Humboldt County, CA | Construction sand and gravel | 7 | 4 |
| Sandy Prairie Portable Crusher Plant a | Mercer Fraser Company | Humboldt County, CA | Construction sand and gravel | 4 | 4 |
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.