Key Takeaway
MT. GAINES MINE is a active surface mine producing SandAndGravel, located in Hornitos, Mariposa County, CA. It has 49 violations on record (4 S&S) and $6K in proposed penalties. Operated by Mt Gaines Rock.
MT. GAINES MINE
Operator: Mt Gaines Rock
Controller: Jack Bankhead
Location: Hornitos, Mariposa County, CA
Employees: 3
Recent Violations
View all 49 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/19/2026 | 56.20010 | Non-S&S | ModNegligence | $0 |
| 02/18/2026 | 50.30(a) | Non-S&S | LowNegligence | $0 |
| 02/18/2026 | 56.23002(a) | Non-S&S | LowNegligence | $0 |
| 02/18/2026 | 56.18002(a) | Non-S&S | LowNegligence | $0 |
| 05/28/2025 | 56.9300(a) | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 56.12018 | Non-S&S | LowNegligence | $151 |
| 05/28/2025 | 46.5(b) | S&S | ModNegligence | $407 |
| 08/14/2024 | 56.14132(a) | Non-S&S | LowNegligence | $147 |
| 09/11/2023 | 56.9300(a) | Non-S&S | ModNegligence | $143 |
| 09/11/2023 | 47.41(a)(1) | Non-S&S | LowNegligence | $143 |
| 09/11/2023 | 50.30(a) | Non-S&S | LowNegligence | $143 |
| 09/11/2023 | 56.18010 | Non-S&S | ModNegligence | $143 |
| 08/23/2021 | 56.14101(a)(3) | Non-S&S | ModNegligence | $125 |
| 03/24/2021 | 56.9300 | Non-S&S | ModNegligence | $125 |
| 06/11/2020 | 56.12018 | Non-S&S | ModNegligence | $123 |
| 06/11/2020 | 56.14107(a) | Non-S&S | ModNegligence | $123 |
| 03/04/2020 | 56.11027 | Non-S&S | ModNegligence | $123 |
| 08/30/2019 | 56.14132(b)(2) | Non-S&S | ModNegligence | $121 |
| 12/07/2017 | 56.12004 | Non-S&S | ModNegligence | $118 |
| 08/01/2017 | 56.12008 | Non-S&S | ModNegligence | $116 |
Inspections
View all 55 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/19/2026 | 02/20/2026 | 0.00 | 0 |
| 02/17/2026 | 02/23/2026 | 29.00 | 1 |
| 07/07/2025 | 07/07/2025 | 8.75 | 1 |
| 07/02/2025 | 07/02/2025 | 9.75 | 1 |
| 05/27/2025 | 05/28/2025 | 18.00 | 1 |
| 12/12/2024 | 12/12/2024 | 3.00 | 1 |
| 08/20/2024 | 08/20/2024 | 4.00 | 1 |
| 08/14/2024 | 08/14/2024 | 6.75 | 1 |
| 08/14/2024 | 08/14/2024 | 1.00 | 1 |
| 06/26/2024 | 06/27/2024 | 9.50 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does MT. GAINES MINE have?
MT. GAINES MINE has 49 MSHA violations on record, of which 4 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $6K.
What type of mine is MT. GAINES MINE?
MT. GAINES MINE is a Surface mine producing SandAndGravel, located in Hornitos, Mariposa County, CA. It currently has 3 employees.
Has anyone been injured or killed at MT. GAINES MINE?
According to MSHA records, MT. GAINES MINE has 0 reported accident/injury records and 0 fatalities on file.
Who operates MT. GAINES MINE?
MT. GAINES MINE is operated by Mt Gaines Rock and controlled by Jack Bankhead. MSHA Mine ID: 0404794.