Data / Mines / California / Martis Valley Plant
Martis Valley Plant: 13 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Martis Valley Plant is an intermittent construction sand and gravel surface mine in Nevada County, California, operated by Teichert Aggregates with 4 employees on MSHA's record (mine ID 0401679). Since January 1, 2022 MSHA inspectors issued 13 citations and orders there with $4,073 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Martis Valley Plant (MSHA mine ID 0401679) in Nevada County, California: each new citation and each accident report. $10 of work on sign-up, no card.
SpecStream is the live web data engine for teams and agents. It reads the mine, citation, inspection and accident files that MSHA publishes, and this page is that reading. Ask for the mines of a commodity, state or operator with the operator's headquarters, website and size added from the web, and new mines, new citations and new accident reports arrive in your sheet, CRM, Slack or agent as MSHA posts them.
- MSHA mine ID
- 0401679
- Status
- Intermittent since January 29, 2023
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Nevada County, California
- Nearest town
- Truckee
- Operator
- Teichert Aggregates
- Parent company
- Teichert Inc
- Employees
- 4
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 13
- Significant and substantial
- 3 (23.1%)
- Closure orders
- 1
- High negligence or reckless
- 1
- Proposed penalties
- $4,073
- Amount paid so far
- $4,073
- Inspections
- 7
- Inspector hours on site
- 64
- Citations per inspection
- 1.86 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- July 23, 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 | 5 | 3 | $2,901 | 1 |
| 2023 | 4 | 0 | $572 | 0 |
| 2024 | 1 | 0 | $147 | 0 |
| 2025 | 2 | 0 | $302 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Martis Valley 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 | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.1000 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.11016 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12016 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.7 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.12068 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Martis Valley Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| No lost time, or an occupational illness | 1 |
What the accident reports at Martis Valley Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 1 |
Other open mines in Nevada County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Greenhorn Pit & Mill | Hansen Bros Enterprises | Nevada County, CA | Construction sand and gravel | 11 | 14 |
| Ridge Rock Quarry | Hansen Bros Enterprises | Nevada County, CA | Construction sand and gravel | 2 | 13 |
| Ruby Mine | Ruby Gold, Inc. | Nevada County, CA | Gold ore | 2 | 7 |
| Boca Quarry | Teichert Aggregates | Nevada County, CA | Crushed, broken stone | 14 | 2 |
| Red Ledge Mine | Red Ledge Mining Company | Nevada County, CA | Gold ore | 3 | 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.