Coal production
0reported short tons
ACTIVE / OPERATOR PORTFOLIO
Buzzi Unicem USA
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL17977
MINE PORTFOLIO
4 of 4 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 |
|---|---|---|---|---|---|---|
| Lone Star Industries1200064 · Active6/8 quarters reported | Putnam, INFacility · MSHA: Cement | 0 | 616,921 | 51 | 11 | 276.0 |
| LONE STAR PRYOR PLT MILL & QY3401289 · Active6/8 quarters reported | Mayes, OKSurface · MSHA: Cement | 0 | 393,442 | 101 | 13 | 212.8 |
| Lone Star Quarry & Mill2300134 · Active6/8 quarters reported | Cape Girardeau, MOSurface · MSHA: Cement | 0 | 629,593 | 41 | 6 | 258.5 |
| MARYNEAL QUARRY AND MILL4100283 · Active6/8 quarters reported | Nolan, TXFacility · MSHA: Cement | 0 | 446,802 | 342 | 4 | 551.8 |
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
4 of 4 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Lone Star Industries39.61167, -86.87889Open map ↗
- LONE STAR PRYOR PLT MILL & QY35.98694, -95.28111Open map ↗
- Lone Star Quarry & Mill37.31944, -89.53806Open map ↗
- MARYNEAL QUARRY AND MILL32.21194, -100.50722Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. All 4 mines listed under this operator were checked; 4 have reports in the available quarters. Totals use current ownership.
Hours worked
2,086,758reported 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 | 376,932 | 0.00 | 665 | 4/4 mines reporting |
| 2025 Q2 | 0 | 342,545 | 0.00 | 658 | 4/4 mines reporting |
| 2025 Q3 | 0 | 349,126 | 0.00 | 654 | 4/4 mines reporting |
| 2025 Q4 | 0 | 336,905 | 0.00 | 653 | 4/4 mines reporting |
| 2026 Q1 | 0 | 340,812 | 0.00 | 634 | 4/4 mines reporting |
| 2026 Q2 | 0 | 340,438 | 0.00 | 629 | 4/4 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
535121 significant & substantial (S&S)
Accident records
340 records classified as fatality
Proposed penalties · USD
983,800.00519 of 535 violations with amounts
On-site inspection hours
1,299.0066 inspections · 66 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 | 78 | 19 | 184,792.00 | 5 | 0 | 9 | 185.8 |
| 2025-Q2 | 129 | 34 | 281,481.00 | 7 | 0 | 14 | 379.0 |
| 2025-Q3 | 22 | 9 | 21,341.00 | 3 | 0 | 9 | 42.5 |
| 2025-Q4 | 78 | 9 | 276,172.00 | 4 | 0 | 6 | 180.8 |
| 2026-Q1 | 12 | 4 | 16,548.00 | 6 | 0 | 7 | 83.5 |
| 2026-Q2 | 204 | 41 | 200,070.00 | 3 | 0 | 13 | 367.3 |
| 2026-Q3 | 9 | 2 | 3,396.00 | 6 | 0 | 6 | 55.8 |
| 2026-Q4 * | 3 | 3 | — | 0 | 0 | 2 | 4.5 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- MARYNEAL QUARRY AND MILL · 4100283
56.20003(a) · S&S
- MARYNEAL QUARRY AND MILL · 4100283
Verbal Hazard Complaint Inspections · 0.0 on-site hours
- Lone Star Industries · 1200064
Verbal Hazard Complaint Inspections · 4.5 on-site hours
- Lone Star Industries · 1200064
56.4104(a) · S&S
- Lone Star Industries · 1200064
56.14100(c) · S&S
- Lone Star Industries · 1200064
Spot Inspection · 16.8 on-site hours
- Lone Star Industries · 1200064
FIRE · ACCIDENT ONLY
Accident narrative
Fire in coal mill baghouse, extinguished in under 30 minutes. Cause unknown.
- LONE STAR PRYOR PLT MILL & QY · 3401289
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee was sitting in a buggy under the overhang at the storage hall crane entrance. A piece of material broke free and fell and hit the roof of the buggy. A small piece struck the employee on the wrist/hand.
- Lone Star Quarry & Mill · 2300134
EXPLODING VESSELS UNDER PRESSURE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was using CO2 to dislodge a chunk of material in the preheater tower. When the shot went off, it dislodged a small port door, which contacted the employee's left elbow. This caused a small laceration.
- MARYNEAL QUARRY AND MILL · 4100283
Verbal Hazard Complaint Inspections · 5.0 on-site hours
- MARYNEAL QUARRY AND MILL · 4100283
56.9315
- Lone Star Quarry & Mill · 2300134
Spot Inspection · 12.0 on-site hours
- Lone Star Quarry & Mill · 2300134
56.20003(a)
- MARYNEAL QUARRY AND MILL · 4100283
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was using a hammer to strike a metal chute that was plugged with material. EE caught the top of their hand on the flange of the chute during the striking motion casing a laceration to the top of their hand.
- LONE STAR PRYOR PLT MILL & QY · 3401289
Spot Inspection · 2.0 on-site hours
- LONE STAR PRYOR PLT MILL & QY · 3401289
56.14100(a)
- LONE STAR PRYOR PLT MILL & QY · 3401289
56.14100(b)
- Lone Star Industries · 1200064
Verbal Hazard Complaint Inspections · 4.5 on-site hours
- LONE STAR PRYOR PLT MILL & QY · 3401289
103 (g) Written Notification Hazard Complaint Inspectio · 15.5 on-site hours
- Lone Star Industries · 1200064
56.14107(a)
- Lone Star Quarry & Mill · 2300134
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was driving a concrete mixer truck approx. 15-18 mph on the plant road toward the river shop. The driver's side front steer tire blew out causing the truck to immediately pull to the left and struck an abandoned fix support structure. This caused the employee to strike the steering wheel, resulting in laceration that required sutures.
- Lone Star Industries · 1200064
56.14112(b) · $151.00 proposed
- Lone Star Industries · 1200064
56.20003(a) · S&S · $1,968.00 proposed
- Lone Star Industries · 1200064
56.14101(a)(2) · $151.00 proposed
- Lone Star Industries · 1200064
56.14112(b) · S&S · $1,126.00 proposed
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 controller.
Relationships reflect the selected mine status and current MSHA controller/operator fields.