Coal production
0reported short tons
ACTIVE / CONTROLLER PORTFOLIO
NG Operations LLC
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA CONTROLLER ID0160281
MINE PORTFOLIO
6 of 6 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 |
|---|---|---|---|---|---|---|
| Feldman #20202160 · Active6/8 quarters reported | Pinal, AZSurface · MSHA: Gypsum | 0 | 66,030 | 6 | 0 | 32.5 |
| GREBNER-OLESON PIT1301615 · Active6/8 quarters reported | Webster, IASurface · MSHA: Gypsum | 0 | 36,363 | 2 | 1 | 38.3 |
| HARPER QUARRY4102822 · Active6/8 quarters reported | Kimble, TXSurface · MSHA: Gypsum | 0 | 29,596 | 5 | 0 | 46.5 |
| Posey Pit4102670 · Active6/8 quarters reported | Fisher, TXSurface · MSHA: Gypsum | 0 | 24,804 | 11 | 0 | 33.8 |
| SUN CITY MINE1400308 · Active6/8 quarters reported | Barber, KSSurface · MSHA: Gypsum | 0 | 43,900 | 2 | 0 | 17.8 |
| TAWAS QUARRY2000375 · Active6/8 quarters reported | Iosco, MISurface · MSHA: Gypsum | 0 | 75,046 | 4 | 0 | 57.3 |
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
6 of 6 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Feldman #232.86472, -110.69722Open map ↗
- GREBNER-OLESON PIT42.52306, -94.08972Open map ↗
- HARPER QUARRY30.47000, -99.32611Open map ↗
- Posey Pit32.85194, -100.46556Open map ↗
- SUN CITY MINE37.35139, -98.95917Open map ↗
- TAWAS QUARRY44.26417, -83.67528Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. All 6 mines listed under this controller were checked; 6 have reports in the available quarters. Totals use current ownership.
Hours worked
275,739reported 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 | 45,126 | 0.00 | 82 | 6/6 mines reporting |
| 2025 Q2 | 0 | 46,456 | 0.00 | 86 | 6/6 mines reporting |
| 2025 Q3 | 0 | 47,986 | 0.00 | 86 | 6/6 mines reporting |
| 2025 Q4 | 0 | 46,539 | 0.00 | 90 | 6/6 mines reporting |
| 2026 Q1 | 0 | 40,560 | 0.00 | 90 | 6/6 mines reporting |
| 2026 Q2 | 0 | 49,072 | 0.00 | 91 | 6/6 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
303 significant & substantial (S&S)
Accident records
10 records classified as fatality
Proposed penalties · USD
8,164.0030 of 30 violations with amounts
On-site inspection hours
226.0028 inspections · 28 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 | 3 | 1 | 453.00 | 0 | 0 | 5 | 44.5 |
| 2025-Q2 | 9 | 1 | 4,673.00 | 0 | 0 | 6 | 45.3 |
| 2025-Q3 | 1 | 0 | 151.00 | 0 | 0 | 4 | 24.3 |
| 2025-Q4 | 6 | 1 | 1,064.00 | 0 | 0 | 5 | 51.0 |
| 2026-Q1 | 3 | 0 | 615.00 | 0 | 0 | 2 | 10.0 |
| 2026-Q2 | 3 | 0 | 453.00 | 1 | 0 | 3 | 22.8 |
| 2026-Q3 | 5 | 0 | 755.00 | 0 | 0 | 3 | 28.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- GREBNER-OLESON PIT · 1301615
Regular Safety and Health Inspection · 6.0 on-site hours
- TAWAS QUARRY · 2000375
Regular Safety and Health Inspection · 14.3 on-site hours
- Posey Pit · 4102670
56.12006 · $151.00 proposed
- Posey Pit · 4102670
56.12006 · $151.00 proposed
- Posey Pit · 4102670
56.4201(a)(2) · $151.00 proposed
- Posey Pit · 4102670
56.12004 · $151.00 proposed
- Posey Pit · 4102670
56.14205 · $151.00 proposed
- Posey Pit · 4102670
Regular Safety and Health Inspection · 8.0 on-site hours
- SUN CITY MINE · 1400308
Regular Safety and Health Inspection · 8.3 on-site hours
- SUN CITY MINE · 1400308
56.15001 · $151.00 proposed
- SUN CITY MINE · 1400308
56.9300(b) · $151.00 proposed
- Feldman #2 · 0202160
56.14100(b) · $151.00 proposed
- Feldman #2 · 0202160
Regular Safety and Health Inspection · 8.5 on-site hours
- GREBNER-OLESON PIT · 1301615
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
EE was exiting the 980loader in the shop,maintaining 3-points of contact,EE's L foot was on the ground & EEs R foot got stuck in the bottom step.This threw the EE off balance and EE fell backwards and EEs L side landed on a pallet with a cylinder on it.The pallet was approx 10'away from the loader.EE broke 4 ribs on EEs L side from the fall onto the pallet with the cylinder on it.
- HARPER QUARRY · 4102822
Regular Safety and Health Inspection · 6.0 on-site hours
- Feldman #2 · 0202160
56.12032 · $151.00 proposed
- Feldman #2 · 0202160
56.12004 · $151.00 proposed
- Feldman #2 · 0202160
56.6132(b) · $313.00 proposed
- Feldman #2 · 0202160
Regular Safety and Health Inspection · 10.0 on-site hours
- SUN CITY MINE · 1400308
Regular Safety and Health Inspection · 0.0 on-site hours
- TAWAS QUARRY · 2000375
56.12028 · $151.00 proposed
- TAWAS QUARRY · 2000375
Regular Safety and Health Inspection · 14.5 on-site hours
- TAWAS QUARRY · 2000375
103 (g) Written Notification Hazard Complaint Inspectio · 2.0 on-site hours
- TAWAS QUARRY · 2000375
56.9300(b) · S&S · $267.00 proposed
- HARPER QUARRY · 4102822
Regular Safety and Health Inspection · 7.0 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.