Coal production
0reported short tons
ACTIVE / OPERATOR PORTFOLIO
United States Gypsum Company
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL00537
MINE PORTFOLIO
7 of 7 mines and facilities
2025-01-01 – 2026-10-18. 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 |
|---|---|---|---|---|---|---|
| ALABASTER PLANT2000372 · Active6/8 quarters reported | Iosco, MISurface · MSHA: Gypsum | 0 | 112,870 | 1 | 3 | 55.5 |
| FORT DODGE QUARRY1300433 · Active6/8 quarters reported | Webster, IASurface · MSHA: Gypsum | 0 | 105,297 | 10 | 0 | 54.3 |
| PLASTER CITY QUARRY0400915 · Active6/8 quarters reported | Imperial, CASurface · MSHA: Gypsum | 0 | 98,859 | 6 | 2 | 46.0 |
| Shoals Mine1200427 · Active6/8 quarters reported | Martin, INUnderground · MSHA: Gypsum | 0 | 183,257 | 19 | 4 | 441.8 |
| Southard Mine And Plant3400266 · Active6/8 quarters reported | Blaine, OKSurface · MSHA: Gypsum | 0 | 177,683 | 18 | 4 | 78.8 |
| Sperry Mine1300434 · Active6/8 quarters reported | Des Moines, IAUnderground · MSHA: Gypsum | 0 | 185,697 | 33 | 3 | 453.5 |
| Sweetwater Quarry4100847 · Active6/8 quarters reported | Nolan, TXSurface · MSHA: Gypsum | 0 | 81,530 | 49 | 0 | 154.5 |
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
7 of 7 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- ALABASTER PLANT44.19556, -83.57139Open map ↗
- FORT DODGE QUARRY42.48500, -94.13139Open map ↗
- PLASTER CITY QUARRY33.02417, -116.08861Open map ↗
- Shoals Mine38.68389, -86.71417Open map ↗
- Southard Mine And Plant36.05583, -98.47667Open map ↗
- Sperry Mine40.98611, -91.19194Open map ↗
- Sweetwater Quarry32.48472, -100.36639Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 7 mines listed under this operator were checked; 7 have reports in the available quarters. Totals use current ownership.
Hours worked
945,193reported 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 | 165,817 | 0.00 | 334 | 7/7 mines reporting |
| 2025 Q2 | 0 | 166,620 | 0.00 | 337 | 7/7 mines reporting |
| 2025 Q3 | 0 | 169,928 | 0.00 | 340 | 7/7 mines reporting |
| 2025 Q4 | 0 | 154,529 | 0.00 | 338 | 7/7 mines reporting |
| 2026 Q1 | 0 | 141,977 | 0.00 | 332 | 7/7 mines reporting |
| 2026 Q2 | 0 | 146,322 | 0.00 | 315 | 7/7 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
13620 significant & substantial (S&S)
Accident records
160 records classified as fatality
Proposed penalties · USD
66,437.00129 of 136 violations with amounts
On-site inspection hours
1,284.2546 inspections · 46 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 | 30 | 10 | 25,873.00 | 2 | 0 | 8 | 231.3 |
| 2025-Q2 | 22 | 2 | 17,373.00 | 7 | 0 | 4 | 146.8 |
| 2025-Q3 | 13 | 1 | 2,445.00 | 2 | 0 | 12 | 210.8 |
| 2025-Q4 | 17 | 2 | 4,199.00 | 0 | 0 | 7 | 198.5 |
| 2026-Q1 | 10 | 0 | 1,568.00 | 0 | 0 | 3 | 107.0 |
| 2026-Q2 | 13 | 1 | 5,337.00 | 2 | 0 | 6 | 202.5 |
| 2026-Q3 | 25 | 4 | 9,642.00 | 3 | 0 | 5 | 164.0 |
| 2026-Q4 * | 6 | 0 | — | 0 | 0 | 1 | 23.5 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Sperry Mine · 1300434
HOISTING · ACCIDENT ONLY
Accident narrative
The 3rd shift relief hoist man was performing a pre-shift inspection on the #2 emergency hoist. The hoist did not pass inspection on the caliper test for the braking system. Mine maintenance was notified and upon investigation it was determined that the brake chamber was faulty. 19
- Sperry Mine · 1300434
50.10(d) · $7,555.00 proposed
- Sperry Mine · 1300434
57.12004 · $151.00 proposed
- Sperry Mine · 1300434
57.4102 · $151.00 proposed
- Sperry Mine · 1300434
57.4100(b) · $151.00 proposed
- Sperry Mine · 1300434
Regular Safety and Health Inspection · 58.0 on-site hours
- ALABASTER PLANT · 2000372
OTHER · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee was entering Volvo haul truck and felt a pop in their right knee on 3/12. Employee informed operator on 3/25 of the injury. Employee was seen by company doctor on 3/27 and released with no restrictions. Restrictions were instituted after employee consulted with their personal doctor and had a follow-up exam with the company physician on 4/10.
- Sperry Mine · 1300434
HOISTING · ACCIDENT ONLY
Accident narrative
The 1st shift hoistman had an issue with the hoist the afternoon of 4/8. Upon investigation it appeared that there was possibly something wrong with one of the brake valves. After troubleshooting, it was noticed that the brake arm linear position transducer was damaged. The team is currently investigating alternative means of control until a new transducer can be acquired.
- Southard Mine And Plant · 3400266
50.30(a) · $288.00 proposed
- Southard Mine And Plant · 3400266
56.12018 · $398.00 proposed
- Southard Mine And Plant · 3400266
56.14132(a) · $398.00 proposed
- Southard Mine And Plant · 3400266
56.14100(b) · $398.00 proposed
- Southard Mine And Plant · 3400266
56.4402 · $592.00 proposed
- Southard Mine And Plant · 3400266
56.12032 · $592.00 proposed
- Southard Mine And Plant · 3400266
56.20003(a) · S&S · $1,968.00 proposed
- Southard Mine And Plant · 3400266
56.14112(b) · $398.00 proposed
- Southard Mine And Plant · 3400266
56.12032 · $592.00 proposed
- Southard Mine And Plant · 3400266
Regular Safety and Health Inspection · 15.0 on-site hours
- PLASTER CITY QUARRY · 0400915
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
At around 5:10pm, employee was re-installing a cover plate after inspecting the inside of a rock transfer chute between two conveyor belts. All the fasteners on the cover plate were removed except the safety chain. As the employee was installing the first fastener, the plate slipped, and EE reacted by trying to catch the fall with EE's right hand.
- Sperry Mine · 1300434
57.8532 · $959.00 proposed
- Sperry Mine · 1300434
57.14100(c) · $151.00 proposed
- Sperry Mine · 1300434
57.20003(a) · S&S · $398.00 proposed
- Sperry Mine · 1300434
57.12018 · $151.00 proposed
- Sperry Mine · 1300434
57.16005 · $151.00 proposed
- Sperry Mine · 1300434
57.14112(b) · $151.00 proposed
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.