Key Takeaway
Grimes Rock a CalPortland Company is a active surface mine producing SandAndGravel, located in Fillmore, Ventura County, CA. It has 216 violations on record (63 S&S) and $69K in proposed penalties. Operated by CalPortland.
Grimes Rock a CalPortland Company
Operator: CalPortland
Controller: Taiheiyo Cement Corp
Location: Fillmore, Ventura County, CA
Employees: 14
Recent Violations
View all 216 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 11/20/2025 | 56.12028 | Non-S&S | HighNegligence | $398 |
| 11/19/2025 | 56.14211(a) | S&S | LowNegligence | $267 |
| 11/19/2025 | 56.12028 | Non-S&S | ModNegligence | $151 |
| 11/19/2025 | 56.12041 | Non-S&S | ModNegligence | $151 |
| 11/18/2025 | 56.4101 | Non-S&S | ModNegligence | $151 |
| 11/18/2025 | 56.20003(a) | S&S | ModNegligence | $177 |
| 11/18/2025 | 56.18002 | S&S | ModNegligence | $177 |
| 04/01/2025 | 56.14100(a) | Non-S&S | LowNegligence | $151 |
| 04/01/2025 | 56.14130(g) | S&S | LowNegligence | $267 |
| 01/07/2025 | 56.4201(a)(2) | Non-S&S | ModNegligence | $151 |
| 01/07/2025 | 56.4200(b)(2) | Non-S&S | ModNegligence | $151 |
| 01/03/2025 | 56.14100(b) | Non-S&S | ModNegligence | $151 |
| 01/03/2025 | 56.14101(a)(2) | S&S | LowNegligence | $267 |
| 01/03/2025 | 56.14100(a) | S&S | LowNegligence | $267 |
| 01/03/2025 | 56.14100(b) | Non-S&S | ModNegligence | $151 |
| 07/16/2024 | 50.30(a) | Non-S&S | LowNegligence | $147 |
| 01/18/2024 | 56.14132(a) | Non-S&S | LowNegligence | $147 |
| 01/18/2024 | 56.12032 | Non-S&S | LowNegligence | $147 |
| 01/18/2024 | 56.12002 | Non-S&S | LowNegligence | $147 |
| 01/17/2024 | 56.16005 | Non-S&S | ModNegligence | $147 |
Accidents & Injuries
View all 14 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/07/2026 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | None |
| 08/25/2025 | OTHER | DAYS RESTRICTED ACTIVITY ONLY | 15d restricted |
| 11/29/2018 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 2d lost |
| 03/22/2010 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 11d lost |
| 07/08/2008 | OTHER | DAYS AWAY FROM WORK ONLY | 245d lost |
| 05/25/2008 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 3d lost |
| 01/19/2008 | OTHER | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 07/25/2007 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 07/19/2007 | OTHER | DAYS AWAY FROM WORK ONLY | 5d lost |
| 06/16/2007 | OTHER | DAYS AWAY FROM WORK ONLY | 1d lost |
Inspections
View all 87 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/14/2026 | 01/15/2026 | 6.50 | 1 |
| 11/17/2025 | 11/20/2025 | 35.00 | 1 |
| 03/31/2025 | 04/01/2025 | 10.50 | 1 |
| 01/14/2025 | 01/14/2025 | 4.75 | 1 |
| 01/06/2025 | 01/14/2025 | 29.75 | 1 |
| 01/02/2025 | 01/03/2025 | 17.25 | 1 |
| 11/04/2024 | 11/06/2024 | 24.00 | 1 |
| 08/23/2024 | 08/23/2024 | 3.00 | 1 |
| 04/19/2024 | 04/19/2024 | 4.00 | 1 |
| 04/18/2024 | 04/19/2024 | 24.50 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Grimes Rock a CalPortland Company have?
Grimes Rock a CalPortland Company has 216 MSHA violations on record, of which 63 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $69K.
What type of mine is Grimes Rock a CalPortland Company?
Grimes Rock a CalPortland Company is a Surface mine producing SandAndGravel, located in Fillmore, Ventura County, CA. It currently has 14 employees.
Has anyone been injured or killed at Grimes Rock a CalPortland Company?
According to MSHA records, Grimes Rock a CalPortland Company has 14 reported accident/injury records and 0 fatalities on file.
Who operates Grimes Rock a CalPortland Company?
Grimes Rock a CalPortland Company is operated by CalPortland and controlled by Taiheiyo Cement Corp. MSHA Mine ID: 0405432.