Key Takeaway
ROSEMARY'S MOUNTAIN QUARRY is a active surface mine producing Metal, located in Pala, San Diego County, CA. It has 42 violations on record (18 S&S) and $10K in proposed penalties. Operated by HORIZON HILL MATERIALS, LLC.
ROSEMARY'S MOUNTAIN QUARRY
Operator: HORIZON HILL MATERIALS, LLC
Controller: Keeley RMQ LLC; Horizon Hill Materials RMQ LLC
Location: Pala, San Diego County, CA
Employees: 2
Recent Violations
View all 42 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/20/2026 | 46.9(a) | Non-S&S | ModNegligence | $0 |
| 02/20/2026 | 46.4(a)(1) | Non-S&S | ModNegligence | $0 |
| 02/19/2026 | 56.14107(a) | Non-S&S | ModNegligence | $0 |
| 02/19/2026 | 56.14112(b) | Non-S&S | ModNegligence | $0 |
| 02/19/2026 | 56.14107(a) | S&S | ModNegligence | $0 |
| 02/19/2026 | 56.14107(a) | S&S | ModNegligence | $0 |
| 06/27/2024 | 41.12 | Non-S&S | LowNegligence | $147 |
| 04/15/2024 | 50.30(a) | Non-S&S | LowNegligence | $147 |
| 08/10/2023 | 56.14101(a)(2) | S&S | ModNegligence | $143 |
| 08/10/2023 | 56.14101(a)(2) | S&S | ModNegligence | $143 |
| 01/03/2022 | 56.20003(a) | S&S | ModNegligence | $155 |
| 01/03/2022 | 56.14112(b) | Non-S&S | ModNegligence | $133 |
| 05/19/2021 | 56.12023 | Non-S&S | ModNegligence | $125 |
| 11/30/2020 | 56.16005 | Non-S&S | ModNegligence | $123 |
| 11/30/2020 | 56.12004 | Non-S&S | LowNegligence | $123 |
| 09/30/2020 | 56.1000 | Non-S&S | HighNegligence | $123 |
| 12/14/2017 | 56.3200 | S&S | ModNegligence | $429 |
| 08/01/2017 | 56.14101(a)(2) | S&S | ModNegligence | $126 |
| 08/01/2017 | 56.3430 | Non-S&S | ModNegligence | $280 |
| 07/16/2017 | 50.30(a) | Non-S&S | LowNegligence | $116 |
Accidents & Injuries
View all 1 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 07/19/2021 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 232d lost |
Inspections
View all 37 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/02/2026 | 0.00 | 0 | |
| 02/19/2026 | 02/20/2026 | 19.50 | 1 |
| 01/20/2025 | 01/23/2025 | 15.00 | 1 |
| 09/06/2024 | 09/06/2024 | 2.00 | 1 |
| 10/10/2023 | 10/10/2023 | 4.50 | 1 |
| 10/10/2023 | 10/12/2023 | 19.50 | 1 |
| 08/10/2023 | 08/10/2023 | 6.00 | 1 |
| 08/10/2023 | 08/10/2023 | 9.50 | 1 |
| 01/03/2022 | 01/06/2022 | 19.00 | 1 |
| 05/17/2021 | 05/24/2021 | 15.50 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does ROSEMARY'S MOUNTAIN QUARRY have?
ROSEMARY'S MOUNTAIN QUARRY has 42 MSHA violations on record, of which 18 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $10K.
What type of mine is ROSEMARY'S MOUNTAIN QUARRY?
ROSEMARY'S MOUNTAIN QUARRY is a Surface mine producing Metal, located in Pala, San Diego County, CA. It currently has 2 employees.
Has anyone been injured or killed at ROSEMARY'S MOUNTAIN QUARRY?
According to MSHA records, ROSEMARY'S MOUNTAIN QUARRY has 1 reported accident/injury records and 0 fatalities on file.
Who operates ROSEMARY'S MOUNTAIN QUARRY?
ROSEMARY'S MOUNTAIN QUARRY is operated by HORIZON HILL MATERIALS, LLC and controlled by Keeley RMQ LLC; Horizon Hill Materials RMQ LLC. MSHA Mine ID: 0405683.