ACTIVE / CONTROLLER PORTFOLIO

USS Holdings Inc

Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.

MSHA CONTROLLER IDM11007

MINE PORTFOLIO

27 of 27 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	Hours worked	Violations	Accident records	On-site inspection hours
Berkeley Plant4602805 · Active6/8 quarters reported	Morgan, WVSurface · MSHA: Ground Silica	187,508	16	1	243.3
Celatom Mine3503237 · Active6/8 quarters reported	Malheur, ORSurface · MSHA: Diatomaceous Earth (Diatomite)	71,748	1	1	17.8
Celatom Plant3503236 · Active6/8 quarters reported	Malheur, ORFacility · MSHA: Diatomaceous Earth (Diatomite)	194,903	3	1	37.0
Clark Operations2600677 · Active6/8 quarters reported	Storey, NVSurface · MSHA: Diatomaceous Earth (Diatomite)	197,591	14	0	37.8
Colado Mine2600672 · Active6/8 quarters reported	Pershing, NVSurface · MSHA: Diatomaceous Earth (Diatomite)	88,634	4	1	25.5
Colado Plant2600680 · Active6/8 quarters reported	Pershing, NVSurface · MSHA: Diatomaceous Earth (Diatomite)	315,748	18	2	71.5
COLUMBIA PLANT3800138 · Active6/8 quarters reported	Lexington, SCSurface · MSHA: Sand, Industrial NEC	167,718	64	0	256.5
Crane County Plant4105331 · Active5/8 quarters reported	Crane, TXSurface · MSHA: Sand, Industrial NEC	198,772	33	3	191.5
Dubberly Plant1600489 · Active6/8 quarters reported	Webster, LASurface · MSHA: Construction Sand and Gravel	51,116	4	0	50.5
EP Engineered Clays Corporation2200415 · Active6/8 quarters reported	Hinds, MSFacility · MSHA: Clay, Ceramic, Refractory Mnls.	257,894	11	2	69.0
Fernley Operations2601950 · Active6/8 quarters reported	Churchill, NVSurface · MSHA: Diatomaceous Earth (Diatomite)	95,292	9	0	48.8
FOWLKES MINE2200460 · Active6/8 quarters reported	Monroe, MSSurface · MSHA: Bentonite	2,456	1	0	40.0
Hurtsboro Plant0100617 · Active6/8 quarters reported	Russell, ALSurface · MSHA: Construction Sand and Gravel	33,470	5	0	45.5
Jackson Plant4002937 · Active6/8 quarters reported	Madison, TNFacility · MSHA: Sand, Industrial NEC	35,444	0	0	35.3
Lamesa Plant4105363 · Active6/8 quarters reported	Dawson, TXSurface · MSHA: Construction Sand and Gravel	379,622	28	3	148.0
Mapleton Depot Plant3603122 · Active6/8 quarters reported	Huntingdon, PASurface · MSHA: Sand, Industrial NEC	162,554	8	2	136.5
Mauricetown Plant2800526 · Active6/8 quarters reported	Cumberland, NJSurface · MSHA: Sand, Industrial NEC	96,394	6	1	33.3
Middleton Operations4002968 · Active6/8 quarters reported	Hardeman, TNSurface · MSHA: Common Clays NEC	220,058	0	0	51.8
Mill Creek Plant #373400377 · Active6/8 quarters reported	Johnston, OKSurface · MSHA: Sand, Industrial NEC	79,653	4	0	29.3
Mill Creek Plant #393400836 · Active6/8 quarters reported	Johnston, OKSurface · MSHA: Crushed, Broken Sandstone	116,679	14	3	58.0
Millen Plant0901232 · Active6/8 quarters reported	Jenkins, GAFacility · MSHA: Kaolin and Ball Clay	95,835	1	0	37.8
Montpelier Plant4402829 · Active6/8 quarters reported	Hanover, VASurface · MSHA: Aplite	80,817	5	0	97.5
Ottawa Plant1101013 · Active6/8 quarters reported	La Salle, ILSurface · MSHA: Ground Silica	455,548	77	4	261.3
Pacific Plant2300544 · Active6/8 quarters reported	St Louis, MOSurface · MSHA: Quartz, Ground	174,132	11	1	86.3
Port Elizabeth Plant2800510 · Active6/8 quarters reported	Cumberland, NJSurface · MSHA: Construction Sand and Gravel	2,960	1	0	12.5
Rockwood Plant2000608 · Active6/8 quarters reported	Wayne, MISurface · MSHA: Sand, Industrial NEC	60,158	10	0	81.5
Sparta, WI Plant4703644 · Active6/8 quarters reported	Monroe, WISurface · MSHA: Sand, Industrial NEC	137,376	3	1	66.5

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

27 of 27 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

Berkeley Plant39.65778, -78.21000Open map ↗
Celatom Mine43.77389, -117.97778Open map ↗
Celatom Plant43.94639, -117.36556Open map ↗
Clark Operations39.56417, -119.48083Open map ↗
Colado Mine40.28278, -118.73111Open map ↗
Colado Plant40.24444, -118.39111Open map ↗
COLUMBIA PLANT33.88722, -81.16500Open map ↗
Crane County Plant31.60306, -102.69028Open map ↗
Dubberly Plant32.53694, -93.24250Open map ↗
EP Engineered Clays Corporation32.26833, -90.20778Open map ↗
Fernley Operations39.82889, -118.97222Open map ↗
FOWLKES MINE33.73889, -88.53278Open map ↗
Hurtsboro Plant32.24785, -85.41665Open map ↗
Jackson Plant35.59833, -88.88639Open map ↗
Lamesa Plant32.80639, -102.12528Open map ↗
Mapleton Depot Plant40.40806, -77.93556Open map ↗
Mauricetown Plant39.28444, -75.00472Open map ↗
Middleton Operations35.06444, -88.89083Open map ↗
Mill Creek Plant #3734.39028, -96.80417Open map ↗
Mill Creek Plant #3934.40417, -96.82639Open map ↗
Millen Plant32.75556, -81.89944Open map ↗
Montpelier Plant37.79056, -77.74500Open map ↗
Ottawa Plant41.34667, -88.86500Open map ↗
Pacific Plant38.48389, -90.72444Open map ↗
Port Elizabeth Plant39.32583, -74.95944Open map ↗
Rockwood Plant42.07083, -83.23472Open map ↗
Sparta, WI Plant43.92000, -90.85306Open map ↗

Quarterly trends

2025 Q1 – 2026 Q4

JSON CSV

Database snapshot · 2026-10-13. All 27 mines listed under this controller were checked; 27 have reports in the available quarters. Totals use current ownership.

Coal production

reported short tons

2025 Q10
2025 Q2 *0
2025 Q30
2025 Q40
2026 Q10
2026 Q20
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Hours worked

3,960,080

reported employee hours

2025 Q1675,271
2025 Q2 *653,766
2025 Q3700,270
2025 Q4650,097
2026 Q1642,437
2026 Q2638,239
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Tons per hour

0.00

production ÷ hours worked

2025 Q10.00
2025 Q2 *0.00
2025 Q30.00
2025 Q40.00
2026 Q10.00
2026 Q20.00
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

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

Quarterly production, employment and reporting coverage for USS Holdings Inc
Quarter	Coal (short tons)	Hours worked	Tons / hour	Avg. employees	Coverage
2025 Q1	0	675,271	0.00	1,319	27/27 mines reporting
2025 Q2	0	653,766	0.00	1,219	26/27 mines reporting
2025 Q3	0	700,270	0.00	1,278	27/27 mines reporting
2025 Q4	0	650,097	0.00	1,241	27/27 mines reporting
2026 Q1	0	642,437	0.00	1,221	27/27 mines reporting
2026 Q2	0	638,239	0.00	1,209	27/27 mines reporting
2026 Q3	—	—	—	—	No report
2026 Q4	—	—	—	—	No report

Safety and enforcement

2025-01-01 – 2026-10-13

Violations

351

45 significant & substantial (S&S)

2025 Q184
2025 Q228
2025 Q355
2025 Q443
2026 Q144
2026 Q258
2026 Q339
2026 Q4 *0

Accident records

0 records classified as fatality

2025 Q13
2025 Q22
2025 Q34
2025 Q45
2026 Q16
2026 Q23
2026 Q33
2026 Q4 *0

Proposed penalties · USD

138,160.00

328 of 351 violations with amounts

2025 Q131,107
2025 Q28,390
2025 Q331,281
2025 Q425,798
2026 Q19,028
2026 Q227,731
2026 Q34,825
2026 Q4 *—

On-site inspection hours

2,269.75

181 inspections · 181 with hours

2025 Q1434.75
2025 Q2356.25
2025 Q3283.25
2025 Q4276.50
2026 Q1348.25
2026 Q2310.00
2026 Q3260.75
2026 Q4 *0.00

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	Inspections	On-site hours
2025-Q1	84	10	31,107.00	3	32	434.8
2025-Q2	28	3	8,390.00	2	23	356.3
2025-Q3	55	4	31,281.00	4	26	283.3
2025-Q4	43	8	25,798.00	5	23	276.5
2026-Q1	44	7	9,028.00	6	24	348.3
2026-Q2	58	7	27,731.00	3	25	310.0
2026-Q3	39	6	4,825.00	3	26	260.8
2026-Q4 *	0	0	—	0	2	0.0

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Section	Violations	S&S
30 CFR 56.14100Safety defects; examination, correction and records.	36	9
30 CFR 56.20003Housekeeping.	27	8
30 CFR 56.14112Construction and maintenance of guards.	24	0
30 CFR 56.12004Electrical conductors.	22	0
30 CFR 56.11001Safe access.	21	5
30 CFR 56.14107Moving machine parts.	21	4
30 CFR 56.4201Inspection.	15	0
30 CFR 47.41Requirement for container labels.	10	0
30 CFR 56.12032Inspection and cover plates.	10	0
30 CFR 50.30Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.	9	0

Safety activity

inspection2026-10-06F00AB2A
Colado Mine · 2600672
Regular Safety and Health Inspection · 0.0 on-site hours
inspection2026-10-05F044510
COLUMBIA PLANT · 3800138
Compliance Follow-up Inspection · 0.0 on-site hours
inspection2026-09-30F046BBD
Mauricetown Plant · 2800526
Compliance Follow-up Inspection · 0.0 on-site hours
inspection2026-09-30F02E8DF
Berkeley Plant · 4602805
Spot Inspection · 6.0 on-site hours
inspection2026-09-29F04779C
Montpelier Plant · 4402829
Spot Inspection · 13.3 on-site hours
inspection2026-09-17F04450B
COLUMBIA PLANT · 3800138
Verbal Hazard Complaint Inspections · 2.3 on-site hours
inspection2026-09-17F04450C
COLUMBIA PLANT · 3800138
Spot Inspection · 2.0 on-site hours
violation2026-09-175193150
COLUMBIA PLANT · 3800138
56.20003(a) · S&S
violation2026-09-175193149
COLUMBIA PLANT · 3800138
56.20003(a)
violation2026-09-175193148
COLUMBIA PLANT · 3800138
56.12032
violation2026-09-175193147
COLUMBIA PLANT · 3800138
56.14112
inspection2026-09-15F048DFC
FOWLKES MINE · 2200460
Regular Safety and Health Inspection · 18.5 on-site hours
violation2026-09-155193271
FOWLKES MINE · 2200460
56.11003
inspection2026-09-09F03921C
Millen Plant · 0901232
Regular Safety and Health Inspection · 7.8 on-site hours
violation2026-09-095261125
Mauricetown Plant · 2800526
56.14100(b) · S&S
violation2026-09-095261124
Mauricetown Plant · 2800526
56.14100(b)
violation2026-09-095261123
Mauricetown Plant · 2800526
56.14112(a)(1)
violation2026-09-095261122
Mauricetown Plant · 2800526
56.14205 · S&S
inspection2026-09-08F046BB5
Mauricetown Plant · 2800526
Regular Safety and Health Inspection · 13.8 on-site hours
inspection2026-09-076880761
Colado Plant · 2600680
Special Emphasis Programs · 0.8 on-site hours
violation2026-08-279216896
Montpelier Plant · 4402829
56.12028
violation2026-08-269216895
Montpelier Plant · 4402829
56.12008
inspection2026-08-25F02F03A
Montpelier Plant · 4402829
Regular Safety and Health Inspection · 19.3 on-site hours
inspection2026-08-20F0458AB
Lamesa Plant · 4105363
Spot Inspection · 0.0 on-site hours
violation2026-08-205174116
Lamesa Plant · 4105363
50.20-1

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

2 linked operators.

Relationships reflect the selected mine status and current MSHA controller/operator fields.