Key Takeaway
IRWINDALE PLANT is a active surface mine producing SandAndGravel, located in Irwindale, Los Angeles County, CA. It has 456 violations on record (86 S&S) and $443K in proposed penalties. Operated by UNITED ROCK PRODUCTS CORP.
IRWINDALE PLANT
Operator: UNITED ROCK PRODUCTS CORP
Controller: Colas S A
Location: Irwindale, Los Angeles County, CA
Employees: 35
Recent Violations
View all 456 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/18/2026 | 56.20011 | Non-S&S | LowNegligence | $0 |
| 02/18/2026 | 56.14100(b) | Non-S&S | LowNegligence | $0 |
| 02/18/2026 | 56.14100(b) | S&S | ModNegligence | $0 |
| 02/18/2026 | 56.14100(b) | S&S | ModNegligence | $0 |
| 08/13/2025 | 56.20003(a) | Non-S&S | LowNegligence | $697 |
| 08/13/2025 | 56.20003(a) | Non-S&S | LowNegligence | $3,448 |
| 08/12/2025 | 56.11001 | Non-S&S | LowNegligence | $165 |
| 08/12/2025 | 56.12004 | Non-S&S | LowNegligence | $549 |
| 03/11/2025 | 56.14107(a) | Non-S&S | LowNegligence | $245 |
| 03/11/2025 | 56.12032 | Non-S&S | LowNegligence | $2,712 |
| 03/11/2025 | 56.20003(a) | S&S | ModNegligence | $1,818 |
| 03/11/2025 | 56.12023 | Non-S&S | LowNegligence | $592 |
| 03/11/2025 | 56.11002 | Non-S&S | ModNegligence | $366 |
| 03/11/2025 | 56.16006 | Non-S&S | ModNegligence | $1,219 |
| 03/11/2025 | 56.12068 | Non-S&S | LowNegligence | $549 |
| 03/11/2025 | 56.14107(a) | Non-S&S | ModNegligence | $549 |
| 03/11/2025 | 56.4101 | Non-S&S | ModNegligence | $1,219 |
| 03/11/2025 | 56.11003 | S&S | LowNegligence | $818 |
| 03/11/2025 | 56.16001 | S&S | ModNegligence | $1,818 |
| 03/11/2025 | 56.14101(a)(2) | Non-S&S | LowNegligence | $549 |
Accidents & Injuries
View all 28 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 07/19/2021 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 232d lost |
| 10/18/2017 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 5d restricted |
| 10/17/2017 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/16/2016 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
| 12/03/2015 | IGNITION OR EXPLOSION OF GAS OR DUST | DAYS AWAY FROM WORK ONLY | 145d lost |
| 11/13/2015 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 08/22/2015 | MACHINERY | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 12/09/2014 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 8d restricted |
| 04/16/2012 | FIRE | ACCIDENT ONLY | None |
| 11/12/2010 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 3d restricted |
Inspections
View all 93 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/17/2026 | 02/23/2026 | 26.00 | 1 |
| 09/08/2025 | 09/09/2025 | 6.50 | 1 |
| 08/12/2025 | 08/14/2025 | 31.00 | 1 |
| 03/10/2025 | 03/13/2025 | 52.75 | 2 |
| 09/24/2024 | 09/24/2024 | 8.00 | 1 |
| 08/22/2024 | 08/22/2024 | 9.00 | 1 |
| 07/31/2024 | 08/05/2024 | 32.00 | 2 |
| 07/31/2024 | 08/05/2024 | 38.50 | 2 |
| 11/16/2023 | 11/16/2023 | 1.25 | 1 |
| 11/14/2023 | 11/16/2023 | 34.25 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does IRWINDALE PLANT have?
IRWINDALE PLANT has 456 MSHA violations on record, of which 86 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $443K.
What type of mine is IRWINDALE PLANT?
IRWINDALE PLANT is a Surface mine producing SandAndGravel, located in Irwindale, Los Angeles County, CA. It currently has 35 employees.
Has anyone been injured or killed at IRWINDALE PLANT?
According to MSHA records, IRWINDALE PLANT has 28 reported accident/injury records and 0 fatalities on file.
Who operates IRWINDALE PLANT?
IRWINDALE PLANT is operated by UNITED ROCK PRODUCTS CORP and controlled by Colas S A. MSHA Mine ID: 0401763.