Key Takeaway
Dunstone Rock Quarry is a intermittent surface mine producing SandAndGravel, located in Oroville, CA, Butte County, CA. It has 77 violations on record (9 S&S) and $9K in proposed penalties. Operated by Dunstone Rock Quarry.
Dunstone Rock Quarry
Operator: Dunstone Rock Quarry
Controller: Robert J Hammett
Location: Oroville, CA, Butte County, CA
Employees: 2
Recent Violations
View all 77 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/09/2025 | 56.23002(a) | Non-S&S | LowNegligence | $151 |
| 10/09/2025 | 50.30(a) | Non-S&S | LowNegligence | $151 |
| 10/12/2022 | 50.30(a) | Non-S&S | LowNegligence | $133 |
| 10/12/2022 | 56.14207 | Non-S&S | ModNegligence | $133 |
| 10/12/2022 | 56.14107(a) | S&S | ModNegligence | $144 |
| 10/12/2022 | 56.14107(a) | S&S | ModNegligence | $144 |
| 10/12/2022 | 56.14132(b)(2) | Non-S&S | ModNegligence | $133 |
| 10/12/2022 | 56.14101(a)(3) | S&S | ModNegligence | $321 |
| 10/12/2022 | 56.14132(b)(1)(i) | Non-S&S | ModNegligence | $133 |
| 10/12/2022 | 56.14105 | S&S | ModNegligence | $321 |
| 10/12/2022 | 56.4402 | Non-S&S | ModNegligence | $133 |
| 07/15/2021 | 50.30(a) | Non-S&S | ModNegligence | $125 |
| 07/15/2021 | 50.30(a) | Non-S&S | ModNegligence | $125 |
| 07/15/2021 | 50.30(a) | Non-S&S | ModNegligence | $125 |
| 07/15/2021 | 50.30(a) | Non-S&S | ModNegligence | $125 |
| 07/15/2021 | 56.14100(b) | Non-S&S | LowNegligence | $125 |
| 03/10/2020 | 56.12032 | Non-S&S | ModNegligence | $123 |
| 03/10/2020 | 56.12018 | Non-S&S | ModNegligence | $123 |
| 01/16/2020 | 50.30(a) | Non-S&S | ModNegligence | $123 |
| 07/16/2019 | 50.30(a) | Non-S&S | ModNegligence | $123 |
Inspections
View all 47 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 11/17/2025 | 11/17/2025 | 2.50 | 1 |
| 10/09/2025 | 10/09/2025 | 8.50 | 1 |
| 11/06/2024 | 11/07/2024 | 8.00 | 1 |
| 11/22/2023 | 11/22/2023 | 13.00 | 1 |
| 10/27/2022 | 12/01/2022 | 7.00 | 2 |
| 10/11/2022 | 10/13/2022 | 20.50 | 1 |
| 07/29/2022 | 07/29/2022 | 7.00 | 1 |
| 07/19/2021 | 07/19/2021 | 3.25 | 1 |
| 07/15/2021 | 07/16/2021 | 10.75 | 1 |
| 03/10/2020 | 03/11/2020 | 23.25 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Dunstone Rock Quarry have?
Dunstone Rock Quarry has 77 MSHA violations on record, of which 9 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $9K.
What type of mine is Dunstone Rock Quarry?
Dunstone Rock Quarry is a Surface mine producing SandAndGravel, located in Oroville, CA, Butte County, CA. It currently has 2 employees.
Has anyone been injured or killed at Dunstone Rock Quarry?
According to MSHA records, Dunstone Rock Quarry has 0 reported accident/injury records and 0 fatalities on file.
Who operates Dunstone Rock Quarry?
Dunstone Rock Quarry is operated by Dunstone Rock Quarry and controlled by Robert J Hammett. MSHA Mine ID: 0405372.