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U.S. MINING ENTITIES / CONTROLLER / 0110263

ACTIVE / CONTROLLER PORTFOLIO

Wolverine Fuels LLC

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

MSHA CONTROLLER ID0110263

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.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
CASTLE VALLEY PREP PLANT4202455 · Active6/8 quarters reportedCarbon, UTFacility · MSHA: Coal (Bituminous)022,2760049.5
Emery Valley Mine4200079 · Active6/8 quarters reportedEmery, UTUnderground · MSHA: Coal (Bituminous)1,339,277506,090259152,051.3
Fossil Rock Mine4201211 · Active6/8 quarters reportedEmery, UTUnderground · MSHA: Coal (Bituminous)1,354,242602,74623072,135.3
HUNTER PREP PLANT4202052 · Active6/8 quarters reportedEmery, UTFacility · MSHA: Coal (Bituminous)047,2321066.8
SKYLINE MINE #34201566 · Active6/8 quarters reportedCarbon, UTUnderground · MSHA: Coal (Bituminous)3,131,2031,210,611275132,536.5
SUFCO4200089 · Active6/8 quarters reportedSevier, UTUnderground · MSHA: Coal (Bituminous)5,173,8551,293,228349213,416.8

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

6 of 6 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-13Applies to production, safety and portfolio metrics. Silica samples have separate filters.

2025 Q1 – 2026 Q4

JSONCSV

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.

Coal production

10,998,577

reported short tons

  1. 2025 Q12,130,151
  2. 2025 Q21,942,346
  3. 2025 Q32,300,771
  4. 2025 Q41,719,068
  5. 2026 Q11,192,085
  6. 2026 Q21,714,156
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Hours worked

3,682,183

reported employee hours

  1. 2025 Q1652,645
  2. 2025 Q2663,299
  3. 2025 Q3716,641
  4. 2025 Q4621,849
  5. 2026 Q1540,866
  6. 2026 Q2486,883
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Tons per hour

2.99

production ÷ hours worked

  1. 2025 Q13.26
  2. 2025 Q22.93
  3. 2025 Q33.21
  4. 2025 Q42.76
  5. 2026 Q12.20
  6. 2026 Q23.52
  7. 2026 Q3—No usable value reported
  8. 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 Wolverine Fuels LLC
QuarterCoal (short tons)Hours workedTons / hourAvg. employeesCoverage
2025 Q12,130,151652,6453.261,2746/6 mines reporting
2025 Q21,942,346663,2992.931,2826/6 mines reporting
2025 Q32,300,771716,6413.211,2266/6 mines reporting
2025 Q41,719,068621,8492.761,2456/6 mines reporting
2026 Q11,192,085540,8662.201,1616/6 mines reporting
2026 Q21,714,156486,8833.521,0046/6 mines reporting
2026 Q3————No report
2026 Q4————No report

Safety and enforcement

2025-01-01 – 2026-10-13

Violations

1,114

97 significant & substantial (S&S)

  1. 2025 Q1168
  2. 2025 Q2180
  3. 2025 Q3190
  4. 2025 Q4160
  5. 2026 Q199
  6. 2026 Q2135
  7. 2026 Q3160
  8. 2026 Q4 *22

Accident records

56

0 records classified as fatality

  1. 2025 Q111
  2. 2025 Q212
  3. 2025 Q37
  4. 2025 Q412
  5. 2026 Q14
  6. 2026 Q22
  7. 2026 Q38
  8. 2026 Q4 *0

Proposed penalties · USD

548,502.00

958 of 1,114 violations with amounts

  1. 2025 Q1157,881
  2. 2025 Q267,781
  3. 2025 Q3102,292
  4. 2025 Q4121,662
  5. 2026 Q132,696
  6. 2026 Q245,557
  7. 2026 Q320,633
  8. 2026 Q4 *—

On-site inspection hours

10,256.00

97 inspections · 97 with hours

  1. 2025 Q11,386.50
  2. 2025 Q21,399.75
  3. 2025 Q31,646.50
  4. 2025 Q41,569.25
  5. 2026 Q11,279.25
  6. 2026 Q21,391.00
  7. 2026 Q31,535.75
  8. 2026 Q4 *48.00

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
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q116817157,881.0011061,386.5
2025-Q21801067,781.00120111,399.8
2025-Q319017102,292.0070151,646.5
2025-Q416019121,662.00120141,569.3
2026-Q1991432,696.0040101,279.3
2026-Q21351245,557.0020211,391.0
2026-Q3160620,633.0080161,535.8
2026-Q4 *222—00448.0

Most cited CFR sections

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

SectionViolationsS&S
30 CFR 75.400Accumulation of combustible materials.1244
30 CFR 75.333Ventilation controls.960
30 CFR 75.1725Machinery and equipment; operation and maintenance.652
30 CFR 75.512Electric equipment; examination, testing and maintenance.605
30 CFR 75.370Mine ventilation plan; submission and approval.584
30 CFR 75.1731Maintenance of belt conveyors and belt conveyor entries.473
30 CFR 75.503Permissible electric face equipment; maintenance.420
30 CFR 75.380Escapeways; bituminous and lignite mines.3418
30 CFR 75.360Preshift examination at fixed intervals.311
30 CFR 75.403Maintenance of incombustible content of rock dust.270

Safety activity

  1. violation5036043
    SUFCO · 4200089

    75.400

  2. violation5035197
    SUFCO · 4200089

    75.601-1

  3. violation5035196
    SUFCO · 4200089

    75.360(g)

  4. violation5030954
    SKYLINE MINE #3 · 4201566

    75.1100-3

  5. violation5035195
    SUFCO · 4200089

    75.360(g)

  6. violation5035814
    Fossil Rock Mine · 4201211

    75.370(a)(1)

  7. violation5035813
    Fossil Rock Mine · 4201211

    75.380(d)(1) · S&S

  8. violation5037232
    Emery Valley Mine · 4200079

    75.1600-2(e)

  9. violation5037231
    Emery Valley Mine · 4200079

    75.1100-3

  10. violation5036165
    SUFCO · 4200089

    75.380(d)(4)

  11. violation5036164
    SUFCO · 4200089

    75.1731(b)

  12. violation5030711
    Fossil Rock Mine · 4201211

    75.333(h)

  13. violation5037032
    Emery Valley Mine · 4200079

    75.370(a)(1)

  14. violation5037031
    Emery Valley Mine · 4200079

    75.1702

  15. violation5036163
    SUFCO · 4200089

    75.202(a) · S&S

  16. violation5036162
    SUFCO · 4200089

    75.1725(a)

  17. violation5036161
    SUFCO · 4200089

    75.400

  18. violation5035194
    SUFCO · 4200089

    75.400

  19. violation5035193
    SUFCO · 4200089

    75.1725(a)

  20. violation5035192
    SUFCO · 4200089

    75.370(a)(1)

  21. violation5035191
    SUFCO · 4200089

    75.400

  22. inspectionF010BB9
    Emery Valley Mine · 4200079

    Regular Safety and Health Inspection · 6.5 on-site hours

  23. inspectionF007265
    SUFCO · 4200089

    Regular Safety and Health Inspection · 27.5 on-site hours

  24. inspectionF01E44C
    Fossil Rock Mine · 4201211

    Regular Safety and Health Inspection · 0.0 on-site hours

  25. inspectionF020381
    SKYLINE MINE #3 · 4201566

    Regular Safety and Health Inspection · 14.0 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.

EIA-923 · COAL RECEIPTS

Coal shipments and quality

Receipts reported by power plants and terminals, matched by MSHA mine ID.

Latest EIA month: 2026-07Source checked 2026-10-13 · publication lag differs from MSHA.

REPORTED RECEIPTS · SHORT TONS5,087,46046 rows · 3 receiving plants
HEAT CONTENT · BTU/LB11,289Weighted by reported tons
SULFUR / ASH · % BY WEIGHT0.78 / 11.78Separate averages over measured receipts
DELIVERED COST · USD/TON85.09100.0% of reported tons have usable costs
Quarterly receipts and quality
QuarterShort tonsHeat · Btu/lbSulfur %Ash %Delivered USD/ton
2025-Q3 *911,43110,9730.9512.4382.75
2025-Q41,277,67011,1320.8711.8381.85
2026-Q11,074,88511,4200.6511.2286.06
2026-Q21,258,76511,4210.7111.9388.03
2026-Q3 *564,70911,6120.6711.3287.85
Month / sourceMineReceiving plant / supplierShort tonsDelivered USD/tonHeat · Btu/lbSulfur %Ash %PurchaseTransport
2026-07EIA row 12137 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO315,97087.5111,4540.7011.80ContractBITTruck
2026-07EIA row 12484 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · WOLVERINE FUELS LLC.178,13188.2811,7280.4911.40ContractBITTruck
2026-07EIA row 12485 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO70,60888.2812,0240.979.00ContractBITTruck
2026-06EIA row 10229 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO312,88487.6511,4720.7011.80ContractBITTruck
2026-06EIA row 10535 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · SKYLINE135,80290.3211,8230.4511.20ContractBITTruck
2026-06EIA row 10536 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO54,94190.3710,6851.0415.10ContractBITTruck
2026-06EIA row 10537 · preliminarySKYLINE MINE #34201566Huntington8069 · UT · WOLVERINE FUELS LLC.1,07090.3712,6640.519.00ContractBITTruck
2026-05EIA row 8368 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO236,92386.5611,3240.7011.80ContractBITTruck
2026-05EIA row 8650 · preliminarySKYLINE MINE #34201566Huntington8069 · UT · WOLVERINE FUELS LLC.39,37589.6411,5281.1310.40ContractBITTruck
2026-05EIA row 8651 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO53,98389.6410,5791.1216.30ContractBITTruck
2026-05EIA row 8652 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · SKYLINE71,38589.6712,0820.499.60ContractBITTruck
2026-04EIA row 6569 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO230,47987.0811,4020.7011.80ContractBITTruck
2026-04EIA row 6872 · preliminarySKYLINE MINE #34201566Huntington8069 · UT · WOLVERINE FUELS LLC.23,37887.8312,1720.378.80ContractBITTruck
2026-04EIA row 6873 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO38,32487.8310,8541.2414.80ContractBITTruck
2026-04EIA row 6874 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · SKYLINE MINE60,22187.8611,3280.4611.60ContractBITTruck
2026-03EIA row 4746 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO185,28386.5311,3200.7011.80ContractBITTruck
2026-03EIA row 5041 · preliminarySKYLINE MINE #34201566Huntington8069 · UT · SKYLINE MINE6,15787.5111,7710.449.10ContractBITTruck
2026-03EIA row 5042 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO36,73887.5211,8471.089.40ContractBITTruck
2026-03EIA row 5043 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · WOLVERINE FUELS LLC.57,70787.4811,5050.4711.50ContractBITTruck
2026-02EIA row 2815 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO241,22886.3611,2980.7011.80ContractBITTruck
2026-02EIA row 3138 · preliminaryFOSSIL ROCK MINE4201211Huntington8069 · UT · WOLVERINE FUELS LLC.30,08987.1611,2840.4311.70ContractBITTruck
2026-02EIA row 3139 · preliminarySKYLINE MINE #34201566Huntington8069 · UT · SKYLINE MINE35,55687.1411,9940.369.00ContractBITTruck
2026-02EIA row 3140 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO41,28587.3411,7491.079.50ContractBITTruck
2026-01EIA row 835 · preliminarySUFCO4200089Hunter6165 · UT · SUFCO279,75583.6311,1570.7011.80ContractBITTruck
2026-01EIA row 1163 · preliminarySUFCO4200089Huntington8069 · UT · SUFCO52,88587.6011,9570.367.90ContractBITTruck

Delivered cost includes transport and is not mine revenue. Missing prices remain blank. * Fewer than three months are published in the selected quarter. Receipts reflect the months EIA has published; an unfinished quarter is not comparable with a full quarter. Portfolio matches use current ownership.

Coverage, sources and calculations
  • Reported coal receipts at EIA-923 power plants/terminals; this is not a census of mine shipments, exports or metallurgical sales.
  • Matches use only the published MSHA ID, normalized to seven digits. Unidentified mine origins remain in the source table but are not assigned to a mine.
  • Portfolio attribution uses current MSHA ownership, not ownership at the shipment date. Receipts and production can differ because of timing, stocks and coverage.
  • Quality means are weighted by positive reported tons with that measurement. Delivered cost uses only rows with published cost, positive heat and positive tons; missing/withheld costs are never zero-filled.
  • USD/ton = (cents/MMBtu ÷ 100) × MMBtu/ton. This is plant delivered cost, not mine sales price or revenue.
  • Receipt month is as published, including records supplied by annual respondents. Recent months are preliminary and subject to revision. Missing rows do not prove zero shipments.

Imported releases start 2008-01. This window includes 12 published months. EIA releases · Survey instructions

  • 2026 · preliminary · EIA923_Schedules_2_3_4_5_M_07_2026_21SEP2026.xlsx · Page 5 Fuel Receipts and Costs
  • 2025 · final · EIA923_Schedules_2_3_4_5_M_12_2025_Final.xlsx · Page 5 Fuel Receipts and Costs

EIA ANNUAL COAL REPORT · 2024

Coal prices and estimated revenue

Annual county prices and a production-based allocation of county coal sales.

Latest priced year: 2024Source checked 2026-10-13. Prices apply only to their calendar year.

FOB PRICE BENCHMARK · USD/TON—Weighted by estimated sales of covered mines
ESTIMATED SALES · SHORT TONS—Allocated from published county sales
ESTIMATED COAL REVENUE · USD—Covered mines only · not reported revenue
ANNUAL PRODUCTION COVERED0.0%0 of 4 producing annual mine records

The estimate assumes each eligible mine receives its county-average price and shares county sales in proportion to production. Actual sales and prices can differ substantially. Unavailable estimates are excluded; this is not a total for the whole portfolio. Annual price data uses a separate window from the MSHA charts.

Mine / countyAnnual production · tonsCounty FOB · USD/tonEst. sales · tonsEst. coal revenue · USDBasis / availability
Emery Mine4200079 · Emery, Utah1,064,605———County sales or price not published2 eligible mines / 2 sales respondents
Sufco4200089 · Sevier, Utah3,099,164———County sales or price not published1 eligible mines / 1 sales respondents
Fossil Rock Mine4201211 · Emery, Refuse Recovery44,687———Recovery operation excluded
Skyline Mine #34201566 · Carbon, Utah2,963,808———County sales or price not published1 eligible mines / 1 sales respondents
Hunter Prep Plant4202052 · Emery, Utah0———Preparation plant2 eligible mines / 2 sales respondents
Castle Valley Prep Plant4202455 · Carbon, Utah0———Preparation plant1 eligible mines / 1 sales respondents
Method, assumptions and source records
  1. This is an annual county-sales allocation, not reported mine or company revenue. Currency is nominal USD in the source year; quantities are short tons.
  2. Mine share = same-year annual mine production / eligible same-county production. Estimated sales = published county sales × share. Estimated coal revenue = estimated sales × published county average FOB price.
  3. The model assumes eligible mines share county sales in proportion to production and receive the county-average price. Matching mine counts is a check, not proof of identical respondents. Mine quality, contracts and sales timing can differ substantially. No statistical confidence interval is implied.
  4. FOB excludes transport and insurance. EIA-923 delivered costs do not enter this model. No grade premium, state/national fallback, quarterly apportionment or carry-forward to a later year is applied.
  5. Eligibility follows the source's production threshold and excludes preparation-only and refuse operations. Withheld values, inconsistent county counts and missing/ambiguous locations produce no estimate.
  6. County sales are published in thousands of tons and prices to cents. Calculations retain precision, but the inputs are rounded and the allocation is approximate.
  7. Portfolio attribution uses current MSHA ownership, not ownership during the sales year. Covered-mine sums exclude unavailable estimates and must not be read as whole-company revenue. Coverage denominators use the annual EIA mine-production release.

Sales-reporting threshold: 50,000 short tons per mine in 2024. Withheld sales or prices stay unavailable.

EIA Table 30 · county sales and FOB prices · EIA annual mine production · Release index

Annual report released November 19, 2025. Method: county-sales-allocation-v1. JSON and CSV preserve source row numbers and file checksums.

SELECTED PORTFOLIO

4 linked operators.

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

OPERATOR / P23684CANYON FUEL COMPANY LLC3 selected mines →OPERATOR / 0207813Emery Valley Resources, LLC.1 selected mine →OPERATOR / 0139473Fossil Rock Resources, LLC.1 selected mine →OPERATOR / 0139196HUNTER PREP PLANT, LLC1 selected mine →