Data / Mines / California / Natividad Plant
Natividad Plant: 95 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Natividad Plant is an active crushed, broken limestone surface mine in Monterey County, California, operated by Martin Marietta Materials, Inc. with 72 employees on MSHA's record (mine ID 0400156). Since January 1, 2022 MSHA inspectors issued 95 citations and orders there with $105,131 in proposed penalties, and 10 accident reports were filed there, with 10 injury or illness cases.
The request: Watch Natividad Plant (MSHA mine ID 0400156) in Monterey County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0400156
- Status
- Active since May 24, 1973
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Monterey County, California
- Nearest town
- Salinas
- Operator
- Martin Marietta Materials, Inc.
- Parent company
- Martin Marietta Materials Inc
- Employees
- 72
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 95
- Significant and substantial
- 12 (12.6%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $105,131
- Amount paid so far
- $104,426
- Inspections
- 26
- Inspector hours on site
- 278
- Citations per inspection
- 3.65 (all mines 2.30)
- Accident reports
- 10
- Injury and illness cases
- 10
- Fatalities
- 0
- Latest MSHA record
- June 10, 2026
- Citations issued to contractors here
- 2 ($276 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 | 57 | 10 | $48,290 | 4 |
| 2023 | 18 | 2 | $51,937 | 4 |
| 2024 | 12 | 0 | $3,696 | 1 |
| 2025 | 6 | 0 | $906 | 0 |
| 2026 | 2 | 0 | $302 | 1 |
Standards cited most at Natividad 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 56.14107 | Surface metal and nonmetal mines | 18 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.16001 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12034 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14114 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.13015 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Natividad Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| Days away from work or restricted activity | 7 |
| No lost time, or an occupational illness | 2 |
What the accident reports at Natividad Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 5 |
| Machinery | 1 |
| Stepping or kneeling on object | 1 |
| Slip or fall of person | 1 |
| Other | 1 |
| Powered haulage | 1 |
Equipment named in accident reports at Natividad Plant
| Equipment | Reports |
|---|---|
| Flotation and filters | 1 |
| Hand tools (powered) | 1 |
| Ore haulage trucks - off highway trucks | 1 |
| Forklift | 1 |
Other open mines in Monterey County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Hidden Canyon Quarry | San Benito Supply | Monterey County, CA | Construction sand and gravel | 5 | 43 |
| Clark Pit | Wm J Clark Trucking Service Inc | Monterey County, CA | Construction sand and gravel | 3 | 37 |
| Marina Landfill | Don Chapin Company Inc | Monterey County, CA | Sand, industrial | 9 | 11 |
| Handley Ranch Quarry | Granite Construction Company | Monterey County, CA | Crushed, broken stone | 7 | 4 |
| Pine Canyon Quarry | Don Chapin Company Inc | Monterey County, CA | Construction sand and gravel | 3 | 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.