Key Takeaway
PLANT #5 is a active surface mine producing SandAndGravel, located in corona, Riverside County, CA. It has 75 violations on record (13 S&S) and $13K in proposed penalties. Operated by ONYX MATERIALS.
PLANT #5
Operator: ONYX MATERIALS
Controller: Anthony Steen; Corey Kirschner
Location: corona, Riverside County, CA
Employees: 3
Recent Violations
View all 75 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 11/19/2025 | 47.41(a) | Non-S&S | ModNegligence | $151 |
| 11/19/2025 | 56.14100(a) | Non-S&S | HighNegligence | $245 |
| 08/20/2025 | 56.14200 | Non-S&S | LowNegligence | $151 |
| 03/04/2025 | 56.9300(b) | Non-S&S | LowNegligence | $151 |
| 03/04/2025 | 56.16005 | S&S | ModNegligence | $151 |
| 03/04/2025 | 56.12032 | Non-S&S | LowNegligence | $151 |
| 01/16/2025 | 50.30(a) | Non-S&S | LowNegligence | $151 |
| 07/02/2024 | 56.14112(b) | Non-S&S | LowNegligence | $147 |
| 02/14/2024 | 50.30(a) | Non-S&S | HighNegligence | $161 |
| 02/13/2024 | 56.14107 | S&S | ModNegligence | $2,862 |
| 02/13/2024 | 56.14100(b) | Non-S&S | LowNegligence | $147 |
| 02/13/2024 | 56.12018 | Non-S&S | LowNegligence | $147 |
| 08/17/2023 | 56.12032 | S&S | LowNegligence | $167 |
| 08/17/2023 | 56.14107(a) | Non-S&S | ModNegligence | $143 |
| 08/17/2023 | 46.9(c)(1) | Non-S&S | HighNegligence | $143 |
| 08/17/2023 | 46.8(a)(2) | Non-S&S | HighNegligence | $159 |
| 08/17/2023 | 56.14100(b) | Non-S&S | LowNegligence | $143 |
| 01/16/2023 | 50.30(a) | Non-S&S | HighNegligence | $143 |
| 10/27/2022 | 56.14112(b) | S&S | LowNegligence | $133 |
| 10/27/2022 | 56.16005 | Non-S&S | LowNegligence | $133 |
Accidents & Injuries
View all 2 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 12/04/2007 | POWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/12/2006 | OTHER | DAYS AWAY FROM WORK ONLY | 158d lost |
Inspections
View all 48 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 11/19/2025 | 11/20/2025 | 25.00 | 1 |
| 09/02/2025 | 09/02/2025 | 2.00 | 1 |
| 08/20/2025 | 08/21/2025 | 26.75 | 1 |
| 03/13/2025 | 03/13/2025 | 3.50 | 1 |
| 03/04/2025 | 03/05/2025 | 16.50 | 1 |
| 07/02/2024 | 07/02/2024 | 12.50 | 1 |
| 02/13/2024 | 02/15/2024 | 29.00 | 1 |
| 08/29/2023 | 08/29/2023 | 3.00 | 1 |
| 08/17/2023 | 08/22/2023 | 19.75 | 1 |
| 08/17/2023 | 08/17/2023 | 3.00 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does PLANT #5 have?
PLANT #5 has 75 MSHA violations on record, of which 13 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $13K.
What type of mine is PLANT #5?
PLANT #5 is a Surface mine producing SandAndGravel, located in corona, Riverside County, CA. It currently has 3 employees.
Has anyone been injured or killed at PLANT #5?
According to MSHA records, PLANT #5 has 2 reported accident/injury records and 0 fatalities on file.
Who operates PLANT #5?
PLANT #5 is operated by ONYX MATERIALS and controlled by Anthony Steen; Corey Kirschner. MSHA Mine ID: 0405451.