Coal production
0reported short tons
ACTIVE / CONTROLLER PORTFOLIO
American Gilsonite Company
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA CONTROLLER IDM09488
MINE PORTFOLIO
3 of 3 mines and facilities
2025-01-01 – 2026-10-13. Active records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| Bonanza Mines4200854 · Active6/8 quarters reported | Uintah, UTUnderground · MSHA: Gilsonite | 0 | 146,040 | 17 | 3 | 370.8 |
| Bonanza Process Plant4202702 · Active6/8 quarters reported | Uintah, UTFacility · MSHA: Gilsonite | 0 | 61,669 | 9 | 4 | 94.5 |
| COTTONWOOD MINES4202044 · Active6/8 quarters reported | Uintah, UTUnderground · MSHA: Gilsonite | 0 | 31,067 | 7 | 2 | 210.0 |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
Portfolio map
3 of 3 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Bonanza Mines40.01944, -109.17667Open map ↗
- Bonanza Process Plant40.01639, -109.17417Open map ↗
- COTTONWOOD MINES40.23278, -109.80778Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. All 3 mines listed under this controller were checked; 3 have reports in the available quarters. Totals use current ownership.
Hours worked
238,776reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 40,237 | 0.00 | 70 | 3/3 mines reporting |
| 2025 Q2 | 0 | 40,502 | 0.00 | 81 | 3/3 mines reporting |
| 2025 Q3 | 0 | 34,170 | 0.00 | 73 | 3/3 mines reporting |
| 2025 Q4 | 0 | 38,795 | 0.00 | 73 | 3/3 mines reporting |
| 2026 Q1 | 0 | 37,842 | 0.00 | 74 | 3/3 mines reporting |
| 2026 Q2 | 0 | 47,230 | 0.00 | 77 | 3/3 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
333 significant & substantial (S&S)
Accident records
90 records classified as fatality
Proposed penalties · USD
6,222.0033 of 33 violations with amounts
On-site inspection hours
675.2521 inspections · 21 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 10 | 2 | 2,749.00 | 1 | 0 | 5 | 79.5 |
| 2025-Q2 | 12 | 0 | 1,812.00 | 0 | 0 | 3 | 165.5 |
| 2025-Q3 | 3 | 0 | 453.00 | 3 | 0 | 3 | 59.8 |
| 2025-Q4 | 1 | 0 | 151.00 | 1 | 0 | 2 | 89.0 |
| 2026-Q1 | 6 | 1 | 906.00 | 1 | 0 | 3 | 90.0 |
| 2026-Q2 | 1 | 0 | 151.00 | 1 | 0 | 2 | 86.0 |
| 2026-Q3 | 0 | 0 | — | 2 | 0 | 3 | 105.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Bonanza Process Plant · 4202702
Regular Safety and Health Inspection · 33.5 on-site hours
- Bonanza Mines · 4200854
Regular Safety and Health Inspection · 50.5 on-site hours
- Bonanza Mines · 4200854
HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY
Accident narrative
A miner was using a hammer to nail in 2-inch shaft boards. The miner felt a pop in their shoulder while swinging the hammer. The next day, the miner's bicep was bruised and swollen.
- COTTONWOOD MINES · 4202044
Regular Safety and Health Inspection · 21.5 on-site hours
- COTTONWOOD MINES · 4202044
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
A miner was removing 3"x8"x6' boards from the cage. When the miner turned with boards in their hands, they injured their lower back.
- Bonanza Process Plant · 4202702
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
A miner was installing a 6-inch 60D nail into a board. The miner missed the nail and struck their left thumb causing a crushing injury that required stitches.
- Bonanza Mines · 4200854
57.4201(a)(1) · $151.00 proposed
- Bonanza Mines · 4200854
Regular Safety and Health Inspection · 49.0 on-site hours
- COTTONWOOD MINES · 4202044
Regular Safety and Health Inspection · 37.0 on-site hours
- Bonanza Mines · 4200854
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
A miner was standing on a 3"x8"x12' board, mining ore. The board broke under the miner's weight, and the miner rolled their ankle. The ankle sustained a displacement fracture at the bottom of the tibia at the ankle.
- Bonanza Process Plant · 4202702
56.14107(a) · $151.00 proposed
- Bonanza Process Plant · 4202702
56.4130(b) · $151.00 proposed
- Bonanza Process Plant · 4202702
56.4104(a) · $151.00 proposed
- Bonanza Process Plant · 4202702
Regular Safety and Health Inspection · 21.5 on-site hours
- Bonanza Mines · 4200854
57.4201(a)(1) · $151.00 proposed
- Bonanza Mines · 4200854
57.12004 · S&S · $151.00 proposed
- Bonanza Mines · 4200854
57.14100(b) · $151.00 proposed
- COTTONWOOD MINES · 4202044
Regular Safety and Health Inspection · 16.0 on-site hours
- Bonanza Mines · 4200854
Regular Safety and Health Inspection · 52.5 on-site hours
- Bonanza Mines · 4200854
62.130(a) · $151.00 proposed
- Bonanza Mines · 4200854
Regular Safety and Health Inspection · 69.0 on-site hours
- COTTONWOOD MINES · 4202044
Regular Safety and Health Inspection · 20.0 on-site hours
- Bonanza Process Plant · 4202702
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
A miner was turning a pipe with a pipe wrench in one hand, and their other hand on the top of the pipe where an elbow was located. The pipe turned faster than the miner expected, and the miners thumb got caught in the elbow, bending it back.
- Bonanza Process Plant · 4202702
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
A miner was conducting an inspection on an agitator. As the agitator turned, a bolt contacted the miner's finger, resulting in lacerations.
- Bonanza Mines · 4200854
Compliance Follow-up Inspection · 0.0 on-site hours
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
SELECTED PORTFOLIO
1 linked operator.
Relationships reflect the selected mine status and current MSHA controller/operator fields.