ACTIVE / CONTROLLER PORTFOLIO
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MINE PORTFOLIO
2025-01-01 – 2026-10-17. 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 |
|---|---|---|---|---|---|---|
| Big Horn Basin Mines4800974 · Active | Big Horn, WYSurface · MSHA: Bentonite | — | — | 5 | 0 | 35.3 |
| Lucerne Mill4801191 · Active | Hot Springs, WYSurface · MSHA: Bentonite | — | — | 2 | 4 | 13.5 |
| Magnet Cove Mill4800602 · Active | Big Horn, WYFacility · MSHA: Bentonite | — | — | 7 | 3 | 26.3 |
| Magnet Cove Mine4800603 · Active | Big Horn, WYSurface · MSHA: Bentonite | — | — | 7 | 2 | 28.0 |
| Sage Creek Mill4800612 · Active | Big Horn, WYFacility · MSHA: Bentonite | — | — | 1 | 4 | 17.5 |
| Stucco Mill4800611 · Active | Big Horn, WYFacility · MSHA: Bentonite | — | — | 2 | 3 | 34.0 |
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
6 of 6 mines with usable MSHA coordinates. Select a marker to open a mine.
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-17. All 6 mines listed under this controller were checked; 0 have reports in the available quarters. Totals use current ownership.
reported short tons
reported employee hours
production ÷ 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.
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | — | — | — | — | No report |
| 2025 Q2 | — | — | — | — | No report |
| 2025 Q3 | — | — | — | — | No report |
| 2025 Q4 | — | — | — | — | No report |
| 2026 Q1 | — | — | — | — | No report |
| 2026 Q2 | — | — | — | — | No report |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
2025-01-01 – 2026-10-17
0 significant & substantial (S&S)
0 records classified as fatality
21 of 24 violations with amounts
22 inspections · 22 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.
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 0 | 0 | — | 4 | 0 | 2 | 2.3 |
| 2025-Q2 | 0 | 0 | — | 1 | 0 | 1 | 4.5 |
| 2025-Q3 | 6 | 0 | 906.00 | 3 | 0 | 5 | 40.8 |
| 2025-Q4 | 6 | 0 | 906.00 | 1 | 0 | 6 | 49.5 |
| 2026-Q1 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q2 | 0 | 0 | — | 4 | 0 | 2 | 13.5 |
| 2026-Q3 | 12 | 0 | 1,359.00 | 2 | 0 | 6 | 44.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
All violations issued in the selected period. Counts combine subsections.
56.14103(b) · $151.00 proposed
56.16003 · $151.00 proposed
47.41(a) · $151.00 proposed
Regular Safety and Health Inspection · 7.5 on-site hours
Regular Safety and Health Inspection · 4.5 on-site hours
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Weather during the day created slick conditions around the plant. EE was walking from the parking area over to the plant when EE slipped and fell. EE was diagnosed with a lateral knee strain.
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Employee went to stand up in work area when employee felt pain in ankle. The employee was taken to the ER and found to have a sprained ankle. Employee has been removed from work as of 2/24/2025 until 3/6/2025 as per doctor.
HANDLING OF MATERIALS · DYS AWY FRM WRK & RESTRCTD ACT
Employee was opening the door to #2 crusher to clean it out when EE felt pain in the shoulder. The employee went to the doctor on 2/18/25 when they diagnosed EE with a rotator cuff sprain and needs to be on light duty.
HANDLING OF MATERIALS · DYS AWY FRM WRK & RESTRCTD ACT
Employee hurt EE's shoulder while dragging a fuel hose. We were waiting upon diagnostics to figure out what was wrong to know whether it was reportable or not. Employee has been placed on light duty until surgery for a torn rotator cuff.
103 (g) Written Notification Hazard Complaint Inspectio · 0.0 on-site hours
Verbal Hazard Complaint Inspections · 2.3 on-site hours
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
EE was cleaning the feed chute. EE repetitively struck and scraped the bentonite off the bottom of the chute. After performing the task EE felt pain in the right hand and wrist. EE did not seek medical attention at the time. EE sought medical attention on 1/21/25. EE was put on restrictive duty on 1/21/25. The diagnosis is possible tendinitis in the right wrist.
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.
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
Relationships reflect the selected mine status and current MSHA controller/operator fields.