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U.S. MINING ENTITIES / OPERATOR / P23835

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Mammoth Coal

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

MSHA OPERATOR IDP23835

MINE PORTFOLIO

31 of 31 mines and facilities

2025-01-01 – 2026-10-18. All statuses 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
Mammoth Coal Processing Pl & Riv Tipple4603317 · Active6/8 quarters reportedKanawha, WVFacility · MSHA: Coal (Bituminous)081,716282397.5
ROAD FORK #52 MINE4609522 · Active6/8 quarters reportedWyoming, WVUnderground · MSHA: Coal (Bituminous)2,659,4081,277,5541,358516,345.5
15-A Mine4603307 · AbandonedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Alloy No 14608007 · AbandonedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Alloy Powellton4609237 · Abandoned and SealedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Big Creek #14607904 · AbandonedFayette, WVSurface · MSHA: Coal (Bituminous)——00—
Coalburg Extension4609235 · AbandonedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Diamond Energy4608738 · AbandonedLogan, WVUnderground · MSHA: Coal (Bituminous)——00—
Eagle #1 Mine4609164 · Abandoned and SealedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Emerald mine4608980 · Abandoned and SealedMingo, WVUnderground · MSHA: Coal (Bituminous)——00—
Four Mile Deep Mine4609085 · Abandoned and SealedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Guyandotte Energy Slope Mine #24609270 · Abandoned and SealedWyoming, WVUnderground · MSHA: Coal (Bituminous)——00—
Jack's Branch Buffalo Creek4608513 · Abandoned and SealedBoone, WVUnderground · MSHA: Coal (Bituminous)——00—
Laurel Coalburg Tunnel Mine4609148 · Abandoned and SealedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Laurel Creek/Spirit Mine4608387 · Abandoned and SealedBoone, WVUnderground · MSHA: Coal (Bituminous)——00—
Mammoth #2 Gas4609108 · AbandonedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Mammoth Coal Co. Surface Mine4608110 · Abandoned and SealedKanawha, WVSurface · MSHA: Coal (Bituminous)——00—
Marianna No. 1 Mine4609391 · NonProducingWyoming, WVUnderground · MSHA: Coal (Bituminous)——0012.0
Matewan Energy Mine4609238 · Abandoned and SealedMingo, WVUnderground · MSHA: Coal (Bituminous)——00—
Midway Mine4609045 · AbandonedBoone, WVUnderground · MSHA: Coal (Bituminous)——00—
No 130 Mine4606051 · Abandoned and SealedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Pineville Processing4603933 · AbandonedWyoming, WVFacility · MSHA: Coal (Bituminous)——00—
Road Fork #51 Mine4601544 · AbandonedWyoming, WVUnderground · MSHA: Coal (Bituminous)——00—
Shadrick 5 Block4609275 · Abandoned and SealedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Slabcamp4609221 · Abandoned and SealedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Spirit #24609263 · AbandonedBoone, WVUnderground · MSHA: Coal (Bituminous)——00—
Spring Branch Mine4601387 · Abandoned and SealedLogan, WVUnderground · MSHA: Coal (Bituminous)——00—
Stockton Mine4608159 · Abandoned and SealedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—
Trace Creek Energy Mine4609264 · Abandoned and SealedMingo, WVUnderground · MSHA: Coal (Bituminous)——00—
Upper Winifrede Deep Mine4609119 · Abandoned and SealedFayette, WVUnderground · MSHA: Coal (Bituminous)——00—
Winifrede #1 Mine4608867 · AbandonedKanawha, WVUnderground · MSHA: Coal (Bituminous)——00—

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

31 of 31 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

2025 Q1 – 2026 Q4

JSONCSV

Database snapshot · 2026-10-18. All 31 mines listed under this operator were checked; 2 have reports in the available quarters. Totals use current ownership.

Coal production

2,659,408

reported short tons

  1. 2025 Q1422,500
  2. 2025 Q2428,925
  3. 2025 Q3435,782
  4. 2025 Q4402,754
  5. 2026 Q1457,918
  6. 2026 Q2511,529
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Hours worked

1,359,270

reported employee hours

  1. 2025 Q1230,041
  2. 2025 Q2225,625
  3. 2025 Q3223,487
  4. 2025 Q4208,957
  5. 2026 Q1244,352
  6. 2026 Q2226,808
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Tons per hour

1.96

production ÷ hours worked

  1. 2025 Q11.84
  2. 2025 Q21.90
  3. 2025 Q31.95
  4. 2025 Q41.93
  5. 2026 Q11.87
  6. 2026 Q22.26
  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 Spartan Mining Company
QuarterCoal (short tons)Hours workedTons / hourAvg. employeesCoverage
2025 Q1422,500230,0411.843672/2 mines reporting
2025 Q2428,925225,6251.903662/2 mines reporting
2025 Q3435,782223,4871.953672/2 mines reporting
2025 Q4402,754208,9571.933652/2 mines reporting
2026 Q1457,918244,3521.873712/2 mines reporting
2026 Q2511,529226,8082.263652/2 mines reporting
2026 Q3————No report
2026 Q4————No report

Safety and enforcement

2025-01-01 – 2026-10-18

Violations

1,386

255 significant & substantial (S&S)

  1. 2025 Q1175
  2. 2025 Q2242
  3. 2025 Q3159
  4. 2025 Q4171
  5. 2026 Q1185
  6. 2026 Q2197
  7. 2026 Q3209
  8. 2026 Q4 *48

Accident records

53

0 records classified as fatality

  1. 2025 Q12
  2. 2025 Q210
  3. 2025 Q311
  4. 2025 Q48
  5. 2026 Q12
  6. 2026 Q29
  7. 2026 Q311
  8. 2026 Q4 *0

Proposed penalties · USD

1,763,258.00

1,267 of 1,386 violations with amounts

  1. 2025 Q1163,401
  2. 2025 Q2371,525
  3. 2025 Q3289,004
  4. 2025 Q4289,326
  5. 2026 Q1219,221
  6. 2026 Q2241,838
  7. 2026 Q3188,943
  8. 2026 Q4 *—

On-site inspection hours

6,755.00

226 inspections · 226 with hours

  1. 2025 Q1883.75
  2. 2025 Q21,106.00
  3. 2025 Q3791.75
  4. 2025 Q4949.25
  5. 2026 Q1895.00
  6. 2026 Q21,012.75
  7. 2026 Q31,032.00
  8. 2026 Q4 *84.50

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-Q117528163,401.002032883.8
2025-Q224243371,525.00100311,106.0
2025-Q315940289,004.0011033791.8
2025-Q417129289,326.008036949.3
2026-Q118528219,221.002029895.0
2026-Q219739241,838.0090311,012.8
2026-Q320938188,943.00110291,032.0
2026-Q4 *4810—00584.5

Most cited CFR sections

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

SectionViolationsS&S
30 CFR 75.370Mine ventilation plan; submission and approval.13022
30 CFR 75.400Accumulation of combustible materials.1293
30 CFR 75.342Methane monitors.1164
30 CFR 75.220Roof control plan.11328
30 CFR 75.512Electric equipment; examination, testing and maintenance.874
30 CFR 75.202Protection from falls of roof, face and ribs.8374
30 CFR 75.503Permissible electric face equipment; maintenance.791
30 CFR 75.517Power wires and cables; insulation and protection.4634
30 CFR 75.604Permanent splicing of trailing cables.3820
30 CFR 75.1725Machinery and equipment; operation and maintenance.3325

Safety activity

  1. violation5135051
    ROAD FORK #52 MINE · 4609522

    75.517

  2. violation5134651
    ROAD FORK #52 MINE · 4609522

    75.517

  3. violation5134650
    ROAD FORK #52 MINE · 4609522

    75.605

  4. violation5134649
    ROAD FORK #52 MINE · 4609522

    75.220(a)(1)

  5. violation5134648
    ROAD FORK #52 MINE · 4609522

    75.512

  6. violation5094896
    ROAD FORK #52 MINE · 4609522

    75.517 · S&S

  7. violation5094895
    ROAD FORK #52 MINE · 4609522

    75.400

  8. violation5094894
    ROAD FORK #52 MINE · 4609522

    75.512

  9. inspectionF02EE11
    ROAD FORK #52 MINE · 4609522

    103(i) Spot Inspections · 6.0 on-site hours

  10. violation5131424
    ROAD FORK #52 MINE · 4609522

    75.342(a)(4)

  11. violation5135050
    ROAD FORK #52 MINE · 4609522

    75.220(a)(1)

  12. violation5135049
    ROAD FORK #52 MINE · 4609522

    75.342(a)(4)

  13. violation5135048
    ROAD FORK #52 MINE · 4609522

    75.604(b) · S&S

  14. violation5135047
    ROAD FORK #52 MINE · 4609522

    75.606

  15. violation5134647
    ROAD FORK #52 MINE · 4609522

    75.503 · S&S

  16. violation5135046
    ROAD FORK #52 MINE · 4609522

    75.220(a)(1)

  17. violation5135045
    ROAD FORK #52 MINE · 4609522

    75.400

  18. violation5135044
    ROAD FORK #52 MINE · 4609522

    75.1725(a) · S&S

  19. violation5135043
    ROAD FORK #52 MINE · 4609522

    75.370(a)(1)

  20. violation5135042
    ROAD FORK #52 MINE · 4609522

    75.220(a)(1)

  21. violation5135041
    ROAD FORK #52 MINE · 4609522

    75.400

  22. violation5134646
    ROAD FORK #52 MINE · 4609522

    75.1600-3(a)(1)

  23. violation5134645
    ROAD FORK #52 MINE · 4609522

    75.220(a)(1)

  24. violation5134644
    ROAD FORK #52 MINE · 4609522

    75.1403-10(e)

  25. violation5134643
    ROAD FORK #52 MINE · 4609522

    Description not reported

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.

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 2026-10-18 · publication lag differs from MSHA.

REPORTED RECEIPTS · SHORT TONS—0 rows · 0 receiving plants
HEAT CONTENT · BTU/LB—Weighted by reported tons
SULFUR / ASH · % BY WEIGHT— / —Separate averages over measured receipts
DELIVERED COST · USD/TON—No price coverage

No receipts matched this operator in the selected period. EIA-923 does not cover all mine sales, exports or metallurgical coal shipments.

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 2026-10-18. Prices apply only to their calendar year.

FOB PRICE BENCHMARK · USD/TON151.85Weighted by estimated sales of covered mines
ESTIMATED SALES · SHORT TONS1,806,196Allocated from published county sales
ESTIMATED COAL REVENUE · USD274,270,869Covered mines only · not reported revenue
ANNUAL PRODUCTION COVERED100.0%1 of 2 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. 28 current coal members have no matching annual record; their coverage is unknown. Annual price data uses a separate window from the MSHA charts.

Mine / countyAnnual production · tonsCounty FOB · USD/tonEst. sales · tonsEst. coal revenue · USDBasis / availability
Road Fork #52 Mine4609522 · Wyoming, West Virginia1,772,725151.851,806,196274,270,869County allocation estimate26.80% of eligible county production18 eligible mines / 18 sales respondents
Spring Branch Mine4601387 · Location unavailable————No matching annual production record
Road Fork #51 Mine4601544 · Location unavailable————No matching annual production record
15-A Mine4603307 · Location unavailable————No matching annual production record
Mammoth Coal Processing Pl &4603317 · Kanawha, West Virginia099.79——Preparation plant5 eligible mines / 5 sales respondents
Pineville Processing4603933 · Location unavailable————No matching annual production record
No 130 Mine4606051 · Location unavailable————No matching annual production record
Big Creek #14607904 · Location unavailable————No matching annual production record
Alloy No 14608007 · Location unavailable————No matching annual production record
Mammoth Coal Co. Surface Mine4608110 · Location unavailable————No matching annual production record
Stockton Mine4608159 · Location unavailable————No matching annual production record
Laurel Creek/Spirit Mine4608387 · Location unavailable————No matching annual production record
Jack's Branch Buffalo Creek4608513 · Location unavailable————No matching annual production record
Diamond Energy4608738 · Location unavailable————No matching annual production record
Winifrede #1 Mine4608867 · Location unavailable————No matching annual production record
Emerald mine4608980 · Location unavailable————No matching annual production record
Midway Mine4609045 · Location unavailable————No matching annual production record
Four Mile Deep Mine4609085 · Location unavailable————No matching annual production record
Mammoth #2 Gas4609108 · Location unavailable————No matching annual production record
Upper Winifrede Deep Mine4609119 · Location unavailable————No matching annual production record
Laurel Coalburg Tunnel Mine4609148 · Location unavailable————No matching annual production record
Eagle #1 Mine4609164 · Location unavailable————No matching annual production record
Slabcamp4609221 · Kanawha, West Virginia62299.79——Below EIA sales-reporting threshold5 eligible mines / 5 sales respondents
Coalburg Extension4609235 · Location unavailable————No matching annual production record
Alloy Powellton4609237 · Location unavailable————No matching annual production record
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

1 linked controller.

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

CONTROLLER / 0127321Alpha Metallurgical Resources Inc31 selected mines →