Key Takeaway
Bonanza Mines is a active underground mine producing Nonmetal, located in Bonanza, Uintah County, UT. It has 500 violations on record (100 S&S) and $178K in proposed penalties. Operated by American Gilsonite Company.
Bonanza Mines
Operator: American Gilsonite Company
Controller: American Gilsonite Company
Location: Bonanza, Uintah County, UT
Employees: 70
Recent Violations
View all 500 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 01/28/2026 | 57.14100(b) | Non-S&S | ModNegligence | $0 |
| 01/28/2026 | 57.12004 | S&S | ModNegligence | $0 |
| 01/28/2026 | 57.4201(a)(1) | Non-S&S | ModNegligence | $0 |
| 12/02/2025 | 62.130(a) | Non-S&S | ModNegligence | $151 |
| 08/26/2025 | 56.4101 | Non-S&S | ModNegligence | $151 |
| 08/26/2025 | 57.12028 | Non-S&S | ModNegligence | $151 |
| 05/29/2025 | 56.12018 | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 57.12004 | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 57.12025 | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 57.4201(a)(1) | Non-S&S | ModNegligence | $151 |
| 05/28/2025 | 57.4201(a)(2) | Non-S&S | ModNegligence | $151 |
| 02/05/2025 | 57.15005 | S&S | LowNegligence | $336 |
| 02/05/2025 | 57.19109 | S&S | ModNegligence | $755 |
| 02/05/2025 | 62.130(a) | Non-S&S | ModNegligence | $151 |
| 02/05/2025 | 62.130(a) | Non-S&S | ModNegligence | $151 |
| 01/29/2025 | 57.3200 | Non-S&S | ModNegligence | $151 |
| 10/09/2024 | 57.11051(a) | Non-S&S | ModNegligence | $161 |
| 10/09/2024 | 57.13021 | Non-S&S | ModNegligence | $147 |
| 10/09/2024 | 57.14107(a) | Non-S&S | ModNegligence | $147 |
| 07/10/2024 | 57.3200 | S&S | ModNegligence | $280 |
Accidents & Injuries
View all 158 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/27/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 14d restricted |
| 01/30/2024 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/19/2023 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 10/03/2023 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/08/2023 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 23d lost |
| 05/11/2023 | STEPPING OR KNEELING ON OBJECT | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 04/10/2023 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/29/2022 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 23d restricted |
| 06/08/2022 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 2d lost, 3d restricted |
| 05/18/2022 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 161 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/07/2026 | 02/02/2026 | 105.00 | 3 |
| 11/17/2025 | 12/11/2025 | 154.00 | 5 |
| 09/08/2025 | 09/08/2025 | 3.50 | 1 |
| 08/22/2025 | 08/28/2025 | 64.25 | 3 |
| 05/23/2025 | 06/16/2025 | 163.75 | 5 |
| 03/11/2025 | 03/11/2025 | 8.00 | 1 |
| 01/29/2025 | 02/12/2025 | 65.00 | 1 |
| 12/23/2024 | 12/23/2024 | 13.50 | 1 |
| 10/09/2024 | 10/22/2024 | 55.50 | 3 |
| 07/08/2024 | 07/11/2024 | 50.50 | 2 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Bonanza Mines have?
Bonanza Mines has 500 MSHA violations on record, of which 100 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $178K.
What type of mine is Bonanza Mines?
Bonanza Mines is a Underground mine producing Nonmetal, located in Bonanza, Uintah County, UT. It currently has 70 employees.
Has anyone been injured or killed at Bonanza Mines?
According to MSHA records, Bonanza Mines has 158 reported accident/injury records and 0 fatalities on file.
Who operates Bonanza Mines?
Bonanza Mines is operated by American Gilsonite Company and controlled by American Gilsonite Company. MSHA Mine ID: 4200854.