Key Takeaway
Diamond Quarry is a active surface mine producing Stone, located in Placerville, El Dorado County, CA. It has 289 violations on record (83 S&S) and $102K in proposed penalties. Operated by Sierra Rock LLC.
Diamond Quarry
Operator: Sierra Rock LLC
Controller: Linda S Brunius; Eric T Brunius
Location: Placerville, El Dorado County, CA
Employees: 10
Recent Violations
View all 289 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/20/2025 | 56.12004 | Non-S&S | LowNegligence | $151 |
| 04/29/2025 | 56.14132(b)(1)(i) | Non-S&S | LowNegligence | $151 |
| 04/29/2025 | 56.12025 | Non-S&S | LowNegligence | $151 |
| 04/10/2024 | 56.12004 | Non-S&S | ModNegligence | $147 |
| 04/10/2024 | 56.14132(a) | Non-S&S | ModNegligence | $147 |
| 04/10/2024 | 56.9300(a) | S&S | ModNegligence | $172 |
| 12/08/2023 | 56.9300(a) | Non-S&S | ModNegligence | $147 |
| 09/07/2023 | 56.14100(b) | Non-S&S | LowNegligence | $143 |
| 09/07/2023 | 56.14100(b) | Non-S&S | ModNegligence | $143 |
| 09/06/2023 | 56.14107(a) | Non-S&S | LowNegligence | $143 |
| 07/07/2023 | 56.14100(b) | Non-S&S | ModNegligence | $143 |
| 07/07/2023 | 56.14107(a) | Non-S&S | ModNegligence | $143 |
| 07/06/2023 | 56.14100(b) | Non-S&S | ModNegligence | $143 |
| 07/06/2023 | 41.11 | Non-S&S | LowNegligence | $143 |
| 05/04/2022 | 56.14112(b) | Non-S&S | ModNegligence | $133 |
| 05/04/2022 | 56.14107(a) | Non-S&S | ModNegligence | $133 |
| 05/04/2022 | 56.14107(a) | Non-S&S | ModNegligence | $133 |
| 10/26/2021 | 56.14115(b) | Non-S&S | ModNegligence | $125 |
| 04/15/2021 | 47.41(a)(1) | Non-S&S | ModNegligence | $125 |
| 04/15/2021 | 56.9301 | S&S | ModNegligence | $355 |
Accidents & Injuries
View all 3 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 03/30/2005 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 7d lost |
| 10/21/2003 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 1d lost |
| 03/19/2002 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 80 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 10/16/2025 | 10/20/2025 | 14.50 | 1 |
| 04/28/2025 | 04/29/2025 | 14.50 | 1 |
| 02/11/2025 | 02/11/2025 | 8.50 | 1 |
| 04/24/2024 | 04/24/2024 | 5.75 | 1 |
| 04/10/2024 | 04/11/2024 | 14.00 | 1 |
| 12/08/2023 | 12/08/2023 | 19.25 | 1 |
| 10/02/2023 | 10/03/2023 | 8.50 | 1 |
| 09/05/2023 | 09/07/2023 | 13.25 | 1 |
| 08/16/2023 | 08/17/2023 | 4.25 | 1 |
| 07/26/2023 | 07/27/2023 | 6.50 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Diamond Quarry have?
Diamond Quarry has 289 MSHA violations on record, of which 83 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $102K.
What type of mine is Diamond Quarry?
Diamond Quarry is a Surface mine producing Stone, located in Placerville, El Dorado County, CA. It currently has 10 employees.
Has anyone been injured or killed at Diamond Quarry?
According to MSHA records, Diamond Quarry has 3 reported accident/injury records and 0 fatalities on file.
Who operates Diamond Quarry?
Diamond Quarry is operated by Sierra Rock LLC and controlled by Linda S Brunius; Eric T Brunius. MSHA Mine ID: 0404031.