Data / Mines / Martin Marietta Northern California Aggregates,LLC
Martin Marietta Northern California: MSHA record
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Martin Marietta Northern California Aggregates,LLC (MSHA operator ID 0064607) operates 8 open mines with 72 employees in California, mostly construction sand and gravel. Since January 1, 2022 MSHA inspectors issued it 89 citations and orders with $28,842 in proposed penalties, and it reported 5 injury or illness cases. Data from MSHA, November 6, 2026.
The request: Watch Martin Marietta Northern California Aggregates,LLC (MSHA operator ID 0064607): each new citation, each accident report and each new mine. $10 of work on sign-up, no card.
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- MSHA operator ID
- 0064607
- Open mines
- 8
- Employees at open mines
- 72
- States
- California
- Parent company
- Martin Marietta Materials Inc
- Citations and orders since January 1, 2022
- 89
- Significant and substantial
- 10 (11.2%)
- Closure orders
- 2
- High negligence or reckless
- 3
- Proposed penalties
- $28,842
- Amount paid so far
- $27,977
- Inspections
- 110
- Inspector hours on site
- 708
- Citations per inspection
- 0.81 (all mines 2.30)
- Accident reports
- 5
- Injury and illness cases
- 5
- Fatalities
- 0
- Latest MSHA record
- November 2, 2026
Open mines of Martin Marietta Northern California Aggregates,LLC
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Sanger Aggregate Plant | Martin Marietta Northern California Aggregates,LLC | Fresno County, CA | Sand, industrial | 10 | 30 |
| Santa Margarita Aggregates | Martin Marietta Northern California Aggregates,LLC | San Luis Obispo County, CA | Construction sand and gravel | 13 | 17 |
| Clayton Aggregates | Martin Marietta Northern California Aggregates,LLC | Contra Costa County, CA | Crushed, broken stone | 15 | 15 |
| Sisquoc Aggregates | Martin Marietta Northern California Aggregates,LLC | Santa Barbara County, CA | Construction sand and gravel | 12 | 15 |
| Merced Aggregates | Martin Marietta Northern California Aggregates,LLC | Merced County, CA | Construction sand and gravel | 10 | 9 |
| Pier 92 Marine Aggregate | Martin Marietta Northern California Aggregates,LLC | San Francisco County, CA | Construction sand and gravel | 3 | 5 |
| Hughson Aggregates | Martin Marietta Northern California Aggregates,LLC | Stanislaus County, CA | Construction sand and gravel | 3 | 4 |
| Tidewater Oakland Marine Aggregate | Martin Marietta Northern California Aggregates,LLC | Alameda County, CA | Construction sand and gravel | 6 | 3 |
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 | 22 | 3 | $10,965 | 1 |
| 2023 | 14 | 2 | $3,335 | 1 |
| 2024 | 25 | 3 | $8,196 | 1 |
| 2025 | 19 | 0 | $3,956 | 0 |
| 2026 | 9 | 2 | $2,390 | 2 |
Standards cited most at Martin Marietta Northern California Aggregates,LLC
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 56.20003 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.13015 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9301 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4203 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
Injury and illness cases at Martin Marietta Northern California Aggregates,LLC
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 3 |
What the accident reports at Martin Marietta Northern California Aggregates,LLC describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 2 |
| Stepping or kneeling on object | 1 |
| Slip or fall of person | 1 |
| Powered haulage | 1 |
Equipment named in accident reports at Martin Marietta Northern California Aggregates,LLC
| Equipment | Reports |
|---|---|
| Forklift | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Construction sand and gravel | 6 |
| Crushed, broken stone | 1 |
| Sand, industrial | 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.