Coal production
0reported short tons
ALL STATUSES / OPERATOR PORTFOLIO
M-I L L C
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL13501
MINE PORTFOLIO
10 of 10 mines and facilities
2025-01-01 – 2026-10-18. All statuses 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 |
|---|---|---|---|---|---|---|
| AMELIA BARITE PLANT1600825 · Active6/8 quarters reported | Assumption, LAFacility · MSHA: Barite Barium Ore | 0 | 45,896 | 8 | 0 | 42.3 |
| Battle Mountain Grinding Plant2600828 · Active6/8 quarters reported | Lander, NVFacility · MSHA: Barite Barium Ore | 0 | 74,535 | 14 | 1 | 25.3 |
| Mountain Springs Beneficiation Plant2601390 · Active6/8 quarters reported | Lander, NVFacility · MSHA: Barite Barium Ore | 0 | 22,799 | 2 | 0 | 8.8 |
| Clipper Mine2601418 · Abandoned | Lander, NVFacility · MSHA: Barite Barium Ore | — | — | 0 | 0 | — |
| Galveston GBT Barite Grinding Plant4104675 · Abandoned | Galveston, TXFacility · MSHA: Barite Barium Ore | — | — | 0 | 0 | — |
| Galveston Grinding Plant4102515 · Abandoned | Galveston, TXFacility · MSHA: Barite Barium Ore | — | — | 0 | 0 | — |
| Greystone Mine2600411 · Temporarily Idled6/8 quarters reported | Lander, NVSurface · MSHA: Barite Barium Ore | 0 | 56,682 | 5 | 1 | 23.5 |
| M-I L.L.C.-Brownsville Grinding Plant4103033 · Abandoned | Cameron, TXFacility · MSHA: Common Clays NEC | — | — | 0 | 0 | — |
| MI SWACO-Alpine4104829 · Abandoned | Brewster, TXSurface · MSHA: Bentonite | — | — | 0 | 0 | — |
| Westlake Plant1601299 · Abandoned | Calcasieu, LASurface · MSHA: Barite Barium Ore | — | — | 0 | 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
10 of 10 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- AMELIA BARITE PLANT29.65750, -91.11778Open map ↗
- Battle Mountain Grinding Plant40.64861, -116.94083Open map ↗
- Mountain Springs Beneficiation Plant40.64861, -116.94083Open map ↗
- Clipper Mine40.56096, -116.89479Open map ↗
- Galveston GBT Barite Grinding Plant29.30306, -94.81389Open map ↗
- Galveston Grinding Plant29.30175, -94.78918Open map ↗
- Greystone Mine40.27056, -116.87972Open map ↗
- M-I L.L.C.-Brownsville Grinding Plant25.95500, -97.38167Open map ↗
- MI SWACO-Alpine30.35861, -103.66111Open map ↗
- Westlake Plant30.22217, -93.25012Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 10 mines listed under this operator were checked; 4 have reports in the available quarters. Totals use current ownership.
Hours worked
199,912reported 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 | 31,755 | 0.00 | 55 | 4/4 mines reporting |
| 2025 Q2 | 0 | 31,435 | 0.00 | 49 | 4/4 mines reporting |
| 2025 Q3 | 0 | 32,319 | 0.00 | 45 | 4/4 mines reporting |
| 2025 Q4 | 0 | 30,019 | 0.00 | 44 | 4/4 mines reporting |
| 2026 Q1 | 0 | 36,495 | 0.00 | 56 | 4/4 mines reporting |
| 2026 Q2 | 0 | 37,889 | 0.00 | 54 | 4/4 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
294 significant & substantial (S&S)
Accident records
20 records classified as fatality
Proposed penalties · USD
7,980.0028 of 29 violations with amounts
On-site inspection hours
99.7522 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.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 2 | 1 | 418.00 | 1 | 0 | 3 | 11.5 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q3 | 11 | 1 | 2,043.00 | 0 | 0 | 9 | 34.5 |
| 2025-Q4 | 10 | 2 | 4,312.00 | 1 | 0 | 2 | 19.8 |
| 2026-Q1 | 2 | 0 | 487.00 | 0 | 0 | 3 | 15.0 |
| 2026-Q2 | 3 | 0 | 453.00 | 0 | 0 | 1 | 8.5 |
| 2026-Q3 | 1 | 0 | 267.00 | 0 | 0 | 4 | 10.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Greystone Mine · 2600411
56.4104(a) · S&S · $267.00 proposed
- Greystone Mine · 2600411
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Employee tested and had a standard threshold shift on EE's hearing test. Employee came in on day off
- Battle Mountain Grinding Plant · 2600828
Regular Safety and Health Inspection · 5.0 on-site hours
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.
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 controller.
Relationships reflect the selected mine status and current MSHA controller/operator fields.