Data / Mines / California / Wilsey Ranch Quarry
Wilsey Ranch Quarry: 20 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Wilsey Ranch Quarry is an intermittent construction sand and gravel surface mine in Mendocino County, California, operated by Kibesillah Rock Company with 2 employees on MSHA's record (mine ID 0405353). Since January 1, 2022 MSHA inspectors issued 20 citations and orders there with $4,178 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Wilsey Ranch Quarry (MSHA mine ID 0405353) in Mendocino County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405353
- Status
- Intermittent since February 21, 2024
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Mendocino County, California
- Nearest town
- Kibesillah, CA
- Operator
- Kibesillah Rock Company
- Employees
- 2
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 20
- Significant and substantial
- 3 (15.0%)
- Closure orders
- 1
- High negligence or reckless
- 1
- Proposed penalties
- $4,178
- Amount paid so far
- $4,178
- Inspections
- 11
- Inspector hours on site
- 55
- Citations per inspection
- 1.82 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- March 25, 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 | 0 |
| 2023 | 5 | 0 | $715 | 0 |
| 2024 | 13 | 3 | $3,179 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Wilsey Ranch 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 56.14132 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14206 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.18010 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 1 |
Other open mines in Mendocino County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Grist Creek Aggregates, Longvale Plant | Grist Creek Aggregates LLC | Mendocino County, CA | Construction sand and gravel | 3 | 24 |
| Harris Quarry | Northern Aggregates Inc | Mendocino County, CA | Crushed, broken stone | 9 | 21 |
| Geo Plant | Geo Aggregates | Mendocino County, CA | Construction sand and gravel | 3 | 13 |
| Ford Gravel | Nor-Cal Recycled Rock & Aggregates, Inc. | Mendocino County, CA | Construction sand and gravel | 3 | 10 |
| Greenwood Aggregates | Greenwood Aggregates Inc | Mendocino County, CA | Sand, industrial | 2 | 4 |
| Ten Mile River Plant | Geo Aggregates | Mendocino County, CA | Construction sand and gravel | 1 | 1 |
| Sherwood Rd Quarry | Geo Aggregates | Mendocino County, CA | Construction sand and gravel | 1 | 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.