Key Takeaway
Irwindale Aggregates is a active surface mine producing SandAndGravel, located in Irwindale, Los Angeles County, CA. It has 230 violations on record (41 S&S) and $71K in proposed penalties. Operated by Martin Marietta Southern California Aggregates,LLC.
Irwindale Aggregates
Operator: Martin Marietta Southern California Aggregates,LLC
Controller: Martin Marietta Materials Inc
Location: Irwindale, Los Angeles County, CA
Employees: 43
Recent Violations
View all 230 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 07/30/2025 | 56.14107(a) | Non-S&S | LowNegligence | $151 |
| 03/12/2025 | 56.16005 | Non-S&S | ModNegligence | $151 |
| 12/19/2023 | 56.20003(a) | Non-S&S | LowNegligence | $147 |
| 08/15/2023 | 56.12004 | Non-S&S | LowNegligence | $143 |
| 08/15/2023 | 56.12025 | Non-S&S | LowNegligence | $143 |
| 03/15/2023 | 56.12002 | Non-S&S | LowNegligence | $518 |
| 04/29/2022 | 46.6(b) | Non-S&S | ModNegligence | $148 |
| 04/28/2022 | 56.11001 | S&S | ModNegligence | $215 |
| 04/28/2022 | 56.14103(c)(1) | Non-S&S | ModNegligence | $144 |
| 02/03/2022 | 56.14100(b) | S&S | ModNegligence | $1,156 |
| 02/01/2022 | 56.14112(b) | S&S | ModNegligence | $1,156 |
| 02/01/2022 | 56.14100(b) | Non-S&S | LowNegligence | $133 |
| 02/01/2022 | 56.12004 | Non-S&S | ModNegligence | $234 |
| 02/01/2022 | 46.5 | Non-S&S | ModNegligence | $234 |
| 08/02/2021 | 56.20003(a) | Non-S&S | LowNegligence | $125 |
| 08/02/2021 | 56.12004 | Non-S&S | LowNegligence | $237 |
| 03/11/2021 | 47.41(a) | Non-S&S | LowNegligence | $125 |
| 03/09/2021 | 56.14100(a) | Non-S&S | LowNegligence | $125 |
| 07/01/2020 | 56.12004 | Non-S&S | LowNegligence | $123 |
| 06/23/2020 | 56.4603(b) | Non-S&S | LowNegligence | $123 |
Accidents & Injuries
View all 59 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 10/16/2025 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 3d lost, 3d restricted |
| 03/07/2024 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 01/14/2024 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 1d restricted |
| 04/19/2022 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 7d restricted |
| 04/07/2020 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 02/05/2020 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 7d restricted |
| 11/25/2019 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 16d restricted |
| 07/31/2018 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 385d restricted |
| 06/08/2018 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 60d lost, 133d restricted |
| 11/13/2017 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 21d restricted |
Inspections
View all 81 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 10/07/2025 | 10/30/2025 | 55.50 | 1 |
| 07/30/2025 | 07/31/2025 | 22.75 | 1 |
| 03/12/2025 | 03/13/2025 | 32.25 | 2 |
| 07/09/2024 | 07/11/2024 | 31.50 | 1 |
| 12/18/2023 | 12/20/2023 | 27.25 | 1 |
| 08/16/2023 | 08/16/2023 | 3.25 | 1 |
| 08/14/2023 | 08/16/2023 | 33.25 | 1 |
| 05/17/2023 | 05/17/2023 | 2.50 | 1 |
| 03/20/2023 | 03/20/2023 | 7.00 | 1 |
| 03/14/2023 | 03/17/2023 | 24.50 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does Irwindale Aggregates have?
Irwindale Aggregates has 230 MSHA violations on record, of which 41 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $71K.
What type of mine is Irwindale Aggregates?
Irwindale Aggregates is a Surface mine producing SandAndGravel, located in Irwindale, Los Angeles County, CA. It currently has 43 employees.
Has anyone been injured or killed at Irwindale Aggregates?
According to MSHA records, Irwindale Aggregates has 59 reported accident/injury records and 0 fatalities on file.
Who operates Irwindale Aggregates?
Irwindale Aggregates is operated by Martin Marietta Southern California Aggregates,LLC and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 0401838.