3M CORONA PLANT
MSHA mine ID 0400191 · Riverside County, CA
- Operator
- 3M Company
- Controller
- Minnesota Mining & Manufacturing Company
- Mine status
- Active since May 25, 1973
- Mine type
- Surface
- Primary commodity
- Crushed, Broken Stone NEC
- Citations issued
- Jan 30, 2025 to Sep 29, 2026
Past 24 months at a glance
- Inspections
- 13
- Citations and orders
- 35
- Marked S&S by MSHA
- 7
- Assessed penalties
- $23,607
34 of 35 citations have an MSHA assessment so far, first proposed at $23,607. 0 are marked contested.
Citations by standard
The 30 CFR section MSHA cited, most cited first.
| Standard | Citations | Assessed |
|---|---|---|
| 56.20003(a) | 7 | $5,590 |
| 56.14100(b) | 3 | $825 |
| 56.14112(b) | 3 | $1,147 |
| 56.12008 | 2 | $344 |
| 56.14107(a) | 2 | $859 |
| 56.14207 | 2 | $626 |
| 56.11002 | 1 | $6,540 |
| 56.11004 | 1 | $151 |
| 56.12002 | 1 | $151 |
| 56.12032 | 1 | $1,968 |
| 56.12034 | 1 | $193 |
| 56.13020 | 1 | $151 |
| 56.13021 | 1 | $151 |
| 56.14112(a)(1) | 1 | $0 |
| 56.14132(a) | 1 | $209 |
| 56.14132(b)(1)(i) | 1 | $209 |
| 56.15001 | 1 | $398 |
| 56.15014 | 1 | $2,312 |
| 56.18002(a) | 1 | $398 |
| 56.4200(b)(1) | 1 | $151 |
| 56.4200(b)(2) | 1 | $592 |
| 56.4201(a)(2) | 1 | $642 |
Latest citations
| Issued | Assessed |
|---|---|
| Sep 29, 2026 No. 5166081 56.14112(a)(1) | Not yet assessed |
| Apr 7, 2026 No. 5162213 56.14100(b) | $209 Closed |
| Apr 7, 2026 No. 5162212 56.14132(a) | $209 Closed |
| Apr 7, 2026 No. 5162211 56.14132(b)(1)(i) | $209 Closed |
| Apr 7, 2026 No. 5162210 56.14100(b) | $465 Closed |
| Apr 7, 2026 No. 5162209 56.14207 | $313 Closed |
| Apr 7, 2026 No. 5162208 56.14207 | $313 Closed |
| Mar 3, 2026 No. 9890798 56.18002(a) | $398 Closed |
| Mar 3, 2026 No. 9890797 56.20003(a) | $398 Closed |
| Mar 3, 2026 No. 9890796 56.15001 | $398 Closed |
| Mar 3, 2026 No. 9890795 56.4200(b)(2) | $592 Closed |
| Mar 3, 2026 No. 9890794 56.20003(a) | $398 Closed |
| Dec 29, 2025 No. 9509700 56.11002 | $6,540 Closed |
| Dec 29, 2025 No. 9509699 56.20003(a) | $1,968 Closed |
| Dec 29, 2025 No. 5166002 56.12032 | $1,968 Closed |
| Dec 29, 2025 No. 5166001 56.14112(b) | $267 Closed |
| Aug 19, 2025 No. 9890537 56.15014 | $2,312 Closed |
| Aug 13, 2025 No. 5165462 56.20003(a) | $883 Closed |
| Aug 13, 2025 No. 5165461 56.20003(a) | $883 Closed |
| Aug 13, 2025 No. 5165460 56.14107(a) | $592 Closed |
| Aug 12, 2025 No. 5165459 56.14107(a) | $267 Closed |
| Aug 12, 2025 No. 5165458 56.20003(a) | $883 Closed |
| Aug 12, 2025 No. 5165457 56.14112(b) | $592 Closed |
| Apr 11, 2025 No. 9890210 56.20003(a) | $177 Closed |
| Feb 5, 2025 No. 9890508 56.13020 | $151 Closed |
Latest inspections
103 (g) Written Notification Hazard Complaint Inspectio
Event F03717B
Sep 29, 2026
Verbal Hazard Complaint Inspections
Event F02B382
Aug 26, 2026
Compliance Follow-up Inspection
Event F01788B
May 7, 2026
Regular Safety and Health Inspection
Event F037D7A
Apr 6, 2026 to Apr 8, 2026
Compliance Follow-up Inspection
Event F02C170
Mar 19, 2026
103 (g) Written Notification Hazard Complaint Inspectio
Event F037D75
Mar 2, 2026 to Mar 5, 2026
Regular Safety and Health Inspection
Event F016480
Dec 29, 2025 to Dec 30, 2025
Verbal Hazard Complaint Inspections
Event F01647F
Dec 29, 2025 to Dec 30, 2025
Spot Inspection
Event 6878915
Aug 19, 2025 to Aug 20, 2025
103 (g) Written Notification Hazard Complaint Inspectio
Event F017865
Aug 11, 2025 to Aug 14, 2025
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