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
Regular Safety and Health Inspection · 64.3 on-site hours
- FORT DODGE QUARRY · 1300433
Regular Safety and Health Inspection · 9.3 on-site hours
- Shoals Mine · 1200427
57.5002 · S&S · $3,736.00 proposed
- PLASTER CITY QUARRY · 0400915
Regular Safety and Health Inspection · 7.8 on-site hours
- PLASTER CITY QUARRY · 0400915
56.16001 · $151.00 proposed
- PLASTER CITY QUARRY · 0400915
56.14100(c) · S&S · $151.00 proposed
- Shoals Mine · 1200427
57.5002 · S&S · $2,936.00 proposed
- Shoals Mine · 1200427
50.10(d) · S&S · $883.00 proposed
- Shoals Mine · 1200427
57.18002 · S&S · $883.00 proposed
- Shoals Mine · 1200427
INUNDATION · ACCIDENT ONLY
Accident narrative
During an MSHA inspection of the "HP7 area", H2S gas was found near barricade points from the water containment area that fluctuated under and over 25 ppm around the barricade. A "K" order was issued. The inspector made a phone call and was directed to make this a reportable incident categorized as an "inundation" at approximately 2:02 p.m. I reported to MSHA hotline at 2:10 p.m.
- Shoals Mine · 1200427
Non-Injury Accident Investigation · 68.0 on-site hours
- Shoals Mine · 1200427
Description not reported
- Shoals Mine · 1200427
57.5001(a)/57.5005 · S&S · $883.00 proposed
- Shoals Mine · 1200427
Regular Safety and Health Inspection · 28.8 on-site hours
- ALABASTER PLANT · 2000372
Regular Safety and Health Inspection · 9.3 on-site hours
- Sweetwater Quarry · 4100847
58.620 · $1,818.00 proposed
- Sweetwater Quarry · 4100847
56.14100(b) · $366.00 proposed
- Sweetwater Quarry · 4100847
47.41(a) · $366.00 proposed
- Sweetwater Quarry · 4100847
56.14107(a) · S&S · $2,712.00 proposed
- Sweetwater Quarry · 4100847
56.20003(b) · S&S · $1,818.00 proposed
- Sweetwater Quarry · 4100847
56.12002 · $366.00 proposed
- Sweetwater Quarry · 4100847
56.12006 · $1,219.00 proposed
- Sweetwater Quarry · 4100847
Regular Safety and Health Inspection · 29.0 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.