Data / Mines / California / Knife River Construction Vernalis Plant
Knife River Construction Vernalis Plant: 3 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Knife River Construction Vernalis Plant is an active construction sand and gravel surface mine in San Joaquin County, California, operated by Knife River Construction with 11 employees on MSHA's record (mine ID 0405459). Since January 1, 2022 MSHA inspectors issued 3 citations and orders there with $8,329 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Knife River Construction Vernalis Plant (MSHA mine ID 0405459) in San Joaquin County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0405459
- Status
- Active since April 30, 2013
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- San Joaquin County, California
- Nearest town
- Tracy
- Operator
- Knife River Construction
- Parent company
- Knife River Corporation
- Employees
- 11
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 3
- Significant and substantial
- 1 (33.3%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $8,329
- Amount paid so far
- $8,329
- Inspections
- 22
- Inspector hours on site
- 80
- Citations per inspection
- 0.14 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- July 29, 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 |
|---|---|---|---|---|
| 2023 | 0 | 0 | $0 | 1 |
| 2024 | 2 | 0 | $7,511 | 0 |
| 2025 | 1 | 1 | $818 | 0 |
Standards cited most at Knife River Construction Vernalis 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 50.10 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Knife River Construction Vernalis Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at Knife River Construction Vernalis Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 1 |
Equipment named in accident reports at Knife River Construction Vernalis Plant
| Equipment | Reports |
|---|---|
| Crane | 1 |
Other open mines in San Joaquin County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Waverly | San Joaquin County Aggregates | San Joaquin County, CA | Sand, industrial | 4 | 66 |
| Vernalis Plant | Teichert Aggregates | San Joaquin County, CA | Construction sand and gravel | 39 | 23 |
| Vernalis Plant | Granite Construction Company | San Joaquin County, CA | Sand, industrial | 20 | 18 |
| Mossdale Plant | Brown Sand Inc | San Joaquin County, CA | Construction sand and gravel | 18 | 11 |
| Munn & Perkins Pit & Mill | George Reed Inc | San Joaquin County, CA | Construction sand and gravel | 11 | 10 |
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.