Data / Mines / California / Rockfield Plant
Rockfield Plant: 23 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Rockfield Plant is an active construction sand and gravel surface mine in Fresno County, California, operated by Cemex Construction Materials Pacific, LLC with 12 employees on MSHA's record (mine ID 0401897). Since January 1, 2022 MSHA inspectors issued 23 citations and orders there with $5,038 in proposed penalties, and 2 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Rockfield Plant (MSHA mine ID 0401897) in Fresno County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0401897
- Status
- Active since February 21, 1989
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Fresno County, California
- Nearest town
- Herndon
- Operator
- Cemex Construction Materials Pacific, LLC
- Parent company
- Cemex S a
- Employees
- 12
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 23
- Significant and substantial
- 1 (4.3%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $5,038
- Amount paid so far
- $5,038
- Inspections
- 15
- Inspector hours on site
- 141
- Citations per inspection
- 1.53 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- November 2, 2026
- Citations issued to contractors here
- 4 ($6,479 proposed)
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 | 3 | 0 | $549 | 0 |
| 2024 | 7 | 0 | $1,071 | 2 |
| 2025 | 6 | 0 | $1,510 | 0 |
| 2026 | 7 | 1 | $1,908 | 0 |
Standards cited most at Rockfield Plant
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 56.12032 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 62.130 | Occupational noise exposure | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12025 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12006 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Rockfield Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
What the accident reports at Rockfield Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Powered haulage | 2 |
Equipment named in accident reports at Rockfield Plant
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Ore haulage trucks - off highway trucks | 1 |
Other open mines in Fresno County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Seirra Pacific Materials | Granite Construction Company | Fresno County, CA | Construction sand and gravel | 22 | 218 |
| Sanger Aggregate Plant | Martin Marietta Northern California Aggregates,LLC | Fresno County, CA | Sand, industrial | 10 | 30 |
| Coalinga Pit | Granite Construction Company | Fresno County, CA | Construction sand and gravel | 23 | 21 |
| Sanger Plant | CalMat Co | Fresno County, CA | Construction sand and gravel | 18 | 21 |
| Academy Black | Cold Spring Granite Company | Fresno County, CA | Dimension stone | 5 | 15 |
| SP1 | El Dorado Materials LLC | Fresno County, CA | Sand, common | 2 | 11 |
| Portable #1 | Kroeker Inc | Fresno County, CA | Construction sand and gravel | 4 | 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.