Key Takeaway
Corona is a active surface mine producing SandAndGravel, located in Corona, Riverside County, CA. It has 42 violations on record (13 S&S) and $8K in proposed penalties. Operated by Robertson's.
Corona
Operator: Robertson's
Controller: RRM Development Corporation; Mitsubishi Corp
Location: Corona, Riverside County, CA
Employees: 27
Recent Violations
View all 42 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 12/03/2025 | 56.20003(a) | Non-S&S | LowNegligence | $151 |
| 05/06/2025 | 56.11002 | Non-S&S | ModNegligence | $151 |
| 05/06/2025 | 56.20011 | Non-S&S | ModNegligence | $151 |
| 05/06/2025 | 56.20003(a) | S&S | LowNegligence | $151 |
| 09/03/2024 | 50.20-1 | Non-S&S | ModNegligence | $147 |
| 10/11/2023 | 56.14100(b) | S&S | LowNegligence | $143 |
| 10/11/2023 | 56.4200(b)(2) | Non-S&S | LowNegligence | $143 |
| 12/28/2022 | 56.14105 | Non-S&S | LowNegligence | $143 |
| 05/05/2022 | 56.15001 | Non-S&S | ModNegligence | $133 |
| 05/05/2022 | 56.14207 | S&S | ModNegligence | $661 |
| 05/05/2022 | 56.14105 | Non-S&S | ModNegligence | $133 |
| 05/04/2022 | 56.4601 | Non-S&S | LowNegligence | $133 |
| 05/04/2022 | 56.14100(b) | Non-S&S | HighNegligence | $198 |
| 12/29/2021 | 56.4201(a) | Non-S&S | LowNegligence | $133 |
| 12/28/2021 | 56.4104(a) | Non-S&S | ModNegligence | $133 |
| 06/04/2021 | 56.14100(b) | Non-S&S | ModNegligence | $125 |
| 06/02/2021 | 56.16001 | Non-S&S | ModNegligence | $125 |
| 01/20/2021 | 56.14108 | Non-S&S | ModNegligence | $125 |
| 01/20/2021 | 56.13020 | Non-S&S | ModNegligence | $125 |
| 01/19/2021 | 56.14101(a)(2) | Non-S&S | ModNegligence | $125 |
Accidents & Injuries
View all 19 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 12/30/2025 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 1d lost, 31d restricted |
| 07/22/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/15/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 09/30/2024 | MACHINERY | DYS AWY FRM WRK & RESTRCTD ACT | 26d lost, 18d restricted |
| 06/22/2024 | STRIKING OR BUMPING | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
| 12/18/2023 | MACHINERY | DAYS AWAY FROM WORK ONLY | 1d lost |
| 03/27/2023 | HANDTOOLS (NONPOWERED) | DYS AWY FRM WRK & RESTRCTD ACT | 2d lost, 15d restricted |
| 10/17/2022 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 08/12/2021 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/25/2021 | STEPPING OR KNEELING ON OBJECT | DAYS AWAY FROM WORK ONLY | 1d lost |
Inspections
View all 29 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/03/2026 | 02/05/2026 | 27.00 | 1 |
| 12/03/2025 | 12/04/2025 | 26.25 | 1 |
| 05/05/2025 | 05/07/2025 | 20.75 | 1 |
| 03/18/2025 | 03/20/2025 | 21.50 | 1 |
| 09/03/2024 | 09/03/2024 | 6.00 | 1 |
| 08/13/2024 | 08/16/2024 | 17.00 | 1 |
| 10/11/2023 | 10/12/2023 | 26.50 | 1 |
| 08/30/2023 | 08/30/2023 | 3.50 | 1 |
| 08/29/2023 | 08/30/2023 | 14.00 | 1 |
| 05/17/2023 | 05/17/2023 | 4.75 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Corona have?
Corona has 42 MSHA violations on record, of which 13 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $8K.
What type of mine is Corona?
Corona is a Surface mine producing SandAndGravel, located in Corona, Riverside County, CA. It currently has 27 employees.
Has anyone been injured or killed at Corona?
According to MSHA records, Corona has 19 reported accident/injury records and 0 fatalities on file.
Who operates Corona?
Corona is operated by Robertson's and controlled by RRM Development Corporation; Mitsubishi Corp. MSHA Mine ID: 0405887.