MINE DETAILS

No 4 Mine

ActiveUndergroundCoal (Bituminous)

MSHA MINE ID0101247

OPERATORWarrior Met Coal Mining, LLC

CONTROLLERWarrior Met Coal Intermediate Holdco LLC

LOCATIONTuscaloosa, AL

PUBLIC RECORD63,495 linked rows

LOCATION

Mine location

1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

No 4 Mine33.32861, -87.33139Open map ↗

Quarterly trends

2025 Q1 – 2026 Q4

JSON CSV

Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.

Coal production

4,628,761

reported short tons

2025 Q1703,971
2025 Q2709,591
2025 Q3731,790
2025 Q4853,352
2026 Q1813,438
2026 Q2816,619
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Hours worked

1,564,102

reported employee hours

2025 Q1264,653
2025 Q2259,236
2025 Q3256,523
2025 Q4257,238
2026 Q1257,767
2026 Q2268,685
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Tons per hour

2.96

production ÷ hours worked

2025 Q12.66
2025 Q22.74
2025 Q32.85
2025 Q43.32
2026 Q13.16
2026 Q23.04
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 No 4 Mine
Quarter	Coal (short tons)	Hours worked	Tons / hour	Avg. employees	Coverage
2025 Q1	703,971	264,653	2.66	404	1/1 mines reporting
2025 Q2	709,591	259,236	2.74	387	1/1 mines reporting
2025 Q3	731,790	256,523	2.85	381	1/1 mines reporting
2025 Q4	853,352	257,238	3.32	385	1/1 mines reporting
2026 Q1	813,438	257,767	3.16	381	1/1 mines reporting
2026 Q2	816,619	268,685	3.04	393	1/1 mines reporting
2026 Q3	—	—	—	—	No report
2026 Q4	—	—	—	—	No report

Safety and enforcement

2025-01-01 – 2026-10-13

Violations

918

258 significant & substantial (S&S)

2025 Q186
2025 Q2198
2025 Q349
2025 Q4179
2026 Q197
2026 Q2177
2026 Q3126
2026 Q4 *6

Accident records

0 records classified as fatality

2025 Q13
2025 Q27
2025 Q32
2025 Q46
2026 Q13
2026 Q21
2026 Q33
2026 Q4 *0

Proposed penalties · USD

937,971.00

843 of 918 violations with amounts

2025 Q178,706
2025 Q2265,347
2025 Q3129,602
2025 Q4149,975
2026 Q189,564
2026 Q2173,104
2026 Q351,673
2026 Q4 *—

On-site inspection hours

6,362.00

173 inspections · 173 with hours

2025 Q11,002.25
2025 Q2976.00
2025 Q3896.25
2025 Q4875.75
2026 Q1847.75
2026 Q2928.00
2026 Q3830.50
2026 Q4 *5.50

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

Quarter	Violations	S&S	Proposed USD	Accident records	Inspections	On-site hours
2025-Q1	86	18	78,706.00	3	26	1,002.3
2025-Q2	198	68	265,347.00	7	25	976.0
2025-Q3	49	20	129,602.00	2	25	896.3
2025-Q4	179	42	149,975.00	6	24	875.8
2026-Q1	97	20	89,564.00	3	23	847.8
2026-Q2	177	54	173,104.00	1	21	928.0
2026-Q3	126	35	51,673.00	3	27	830.5
2026-Q4 *	6	1	—	0	2	5.5

Most cited CFR sections

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

Section	Violations	S&S
30 CFR 75.202Protection from falls of roof, face and ribs.	161	91
30 CFR 75.400Accumulation of combustible materials.	98	8
30 CFR 75.220Roof control plan.	83	31
30 CFR 75.333Ventilation controls.	45	2
30 CFR 75.1731Maintenance of belt conveyors and belt conveyor entries.	36	7
30 CFR 75.370Mine ventilation plan; submission and approval.	32	7
30 CFR 75.1725Machinery and equipment; operation and maintenance.	31	10
30 CFR 75.403Maintenance of incombustible content of rock dust.	28	0
30 CFR 75.1910Nonpermissible diesel-powered equipment; electrical system design and performance requirements.	27	0
30 CFR 75.503Permissible electric face equipment; maintenance.	27	14

Safety activity

violation2026-10-085192241
75.202(a) · S&S
inspection2026-10-07F026FAF
103(i) Spot Inspections · 0.0 on-site hours
violation2026-10-075192239
75.342(a)(4)
violation2026-10-075192796
75.1731(a)
violation2026-10-075192240
75.400
violation2026-10-055192795
75.1714-3(a)
violation2026-10-045192794
75.204(c)(1)
inspection2026-10-016972571
Regular Safety and Health Inspection · 5.5 on-site hours
inspection2026-09-29F03E4A8
103(i) Spot Inspections · 7.0 on-site hours
inspection2026-09-24F03E4A7
103(i) Spot Inspections · 7.5 on-site hours
violation2026-09-245190975
77.205(a)
violation2026-09-235191493
75.364(g)
inspection2026-09-22F03E4A6
103(i) Spot Inspections · 6.0 on-site hours
violation2026-09-185190702
75.370(a)(1)
violation2026-09-175191492
75.342(a)(4)
violation2026-09-175191491
75.1731(a)
violation2026-09-175190974
75.1002(a) · S&S
violation2026-09-175190973
75.202(a) · S&S
inspection2026-09-16F03E4A5
103(i) Spot Inspections · 5.5 on-site hours
violation2026-09-169709197
75.342(a)(4)
violation2026-09-165193666
75.403
violation2026-09-155190701
72.630(b) · S&S
violation2026-09-155190700
75.370(a)(1)
violation2026-09-155190699
75.370(a)(1)
violation2026-09-155069675
77.410(c)

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.

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 mine 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.

FOB PRICE BENCHMARK · USD/TON—Published county average

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 1 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 / county	Annual production · tons	County FOB · USD/ton	Est. sales · tons	Est. coal revenue · USD	Basis / availability
No 4 Mine0101247 · Tuscaloosa, Alabama	2,769,238	—	—	—	County sales or price not published7 eligible mines / 7 sales respondents

Method, assumptions and source records

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.
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.
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.
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.
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.
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.
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.

OWNERSHIP

Operator and controller history

Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.

CURRENT HIERARCHYWarrior Met Coal Intermediate Holdco LLC → Warrior Met Coal Mining, LLC → No 4 Mine

HISTORY RECORDS26 relationships

INTERVAL CHECKPASScontroller/operator overlap

Mar 31, 2016—CURRENT / OPEN

Warrior Met Coal Intermediate Holdco LLCcontrolsWarrior Met Coal Mining, LLCoperatesNo 4 Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 0101247

Jan 1, 1974—Mar 30, 2016

Walter Energy IncorporatedcontrolsJim Walter Resources IncoperatesNo 4 Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 0101247

Other historical summaries · source-specific periods

RECORD SUMMARY

Production, safety and enforcement

These summaries use the periods stated on each card, independently of the reporting period above.

01 / SAFETYwatch

Accidents and injuries

826 historical accident/injury rows; 3 coded fatalities and 29,732 lost days across the published record.

ACCIDENT + INJURY RECORD61 since 2021

accidentsmine-production-quarterly

02 / COMPLIANCEwatch

Violations and penalties

10,129 violation rows across the full record; 3,042 carry an S&S flag and $7,826,029 appears in current assessed amounts.

ENFORCEMENT ACTIVITY2,938 since 2021

inspectionsviolationsassessed-violationsorders-107a

03 / HEALTHwatch

Occupational health samples

20,152 coal dust; 1,034 coal quartz; 1,209 noise. 0 personal-sample rows have a published C/E ratio above 1; 460 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.

OCCUPATIONAL EXPOSURE22K samples

coal-dust-samplesquartz-samplesnoise-samples

04 / PRODUCTIONcontext

Quarterly production and employment

269K employee hours and 393 summed average employees across reported subunits in the latest published quarter.

2026-Q2817K tons

mine-production-quarterlymine-production-yearly

05 / LEGALwatch

Contests, conferences and decisions

3,722 contested-violation rows, 4,032 civil-penalty docket/decision rows, and 499 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE8,253 linked rows

conferencescontested-violationscivil-penalty-dockets-decisions

06 / CONTRACTORScontext

Contractors

Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.

ENTITY-LEVEL CONTEXT42 linked entities

contractor-production-quarterlycontractor-production-yearlyaccidentsviolations

07 / INSPECTIONScontext

Inspections

3,082 inspection events and 130K published inspection hours across the historical record.

OVERSIGHT COVERAGE629 since 2021

inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 1,034 silica records across the mine’s published history.

Matching records5050 coal · 0 personal · 0 area

Sample status48 not voided2 voided · 0 status not reported

Mean coal quartz concentration10.46 µg/m³48 eligible measurements · 0 missing concentration

Coal quartz concentration

Quarterly mean · µg/m³ · not-voided samples

2026-Q115.8318 measurements
2026-Q28.2914 measurements
2026-Q36.3116 measurements
2026-Q4*—0 measurements

— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.

Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.

2026 · Jan 20, 2026–Sep 9, 2026
Date / sample	Dataset / analyte	Occupation / area	Measurement	Sample status	Published action
Sep 9, 202658551187 / lab 2026037525	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	2 µg/m³0.7% quartz	Not voided	Not reported
Sep 9, 202658551043 / lab 2026037522	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	3 µg/m³1.5% quartz	Not voided	Not reported
Sep 9, 202658551047 / lab 2026037518	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	6 µg/m³1.5% quartz	Not voided	Not reported
Aug 25, 202658551165 / lab 2026035112	Coal quartzQuartz	HEADGATE OPERATORNON DESIGNATED OCCUPATION	17 µg/m³2.6% quartz	VoidedMMU NOT IN PRODUCING STATUS	Not reported
Aug 25, 202658551123 / lab 2026035117	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	0 µg/m³0.3% quartz	Not voided	Not reported
Aug 25, 202658551160 / lab 2026035118	Coal quartzQuartz	JACK SETTER (LONGWALL)NON DESIGNATED OCCUPATION	11 µg/m³2.2% quartz	Not voided	Not reported
Aug 25, 202658551176 / lab 2026035115	Coal quartzQuartz	LONGWALL OPERATOR (TAILGATE SIDE)DESIGNATED OCCUPATION	11 µg/m³2.2% quartz	Not voided	Not reported
Aug 25, 202658551164 / lab 2026035113	Coal quartzQuartz	MECHANICNON DESIGNATED OCCUPATION	3 µg/m³1.7% quartz	Not voided	Not reported
Aug 19, 202658551291 / lab 2026034439	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	5 µg/m³2.3% quartz	Not voided	Not reported
Aug 19, 202658551269 / lab 2026034443	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	1 µg/m³1.1% quartz	Not voided	Not reported
Aug 19, 202658551154 / lab 2026034438	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	9 µg/m³3.2% quartz	Not voided	Not reported
Aug 18, 202658551296 / lab 2026034493	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	22 µg/m³4.7% quartz	Not voided	Not reported
Aug 18, 202658551167 / lab 2026034490	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	0 µg/m³0.5% quartz	Not voided	Not reported
Aug 18, 202658551294 / lab 2026034496	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	4 µg/m³1.9% quartz	Not voided	Not reported
Aug 6, 202658551773 / lab 2026032736	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDDESIGNATED AREA	5 µg/m³0.9% quartz	Not voided	Not reported
Aug 6, 202658551849 / lab 2026032737	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDDESIGNATED AREA	19 µg/m³1.8% quartz	Not voided	Not reported
Jul 20, 202658551635 / lab 2026029772	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDDESIGNATED AREA	0 µg/m³—% quartz	Not voided	Not reported
Jun 24, 202658552036 / lab 2026026428	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	11 µg/m³3.4% quartz	Not voided	Not reported
Jun 24, 202658551809 / lab 2026026427	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	4 µg/m³1.9% quartz	Not voided	Not reported
Jun 24, 202658551806 / lab 2026026426	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	2 µg/m³1.7% quartz	Not voided	Not reported

Sources and interpretation

Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.

Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗

EIA + TITLE 30

EIA production and cited regulations

EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.

EIA MINE CONTEXT2024 record

ANNUAL COAL PRODUCTION2,769,238short tons

LABOR HOURS: 1,170,251
AVG EMPLOYEES: 428
SUPPLY REGION: Appalachia Southern
UNION: United Mine Workers Of America
OPERATION: Mine and Preparation Plant
COMPANY TYPE: Independent Producer Operator

1 published EIA row aggregated under this MSHA ID. Components remain available in JSON.

TITLE 30 CROSSWALKCurrent through 2026-08-19

30 CFR 75.202Protection from falls of roof, face and ribs.1 recent row ↗30 CFR 75.342Methane monitors.2 recent rows ↗30 CFR 75.1731Maintenance of belt conveyors and belt conveyor entries.2 recent rows ↗30 CFR 75.400Accumulation of combustible materials.1 recent row ↗30 CFR 75.1714-3Self-rescue devices; inspection, testing, maintenance, repair, and recordkeeping.1 recent row ↗30 CFR 75.204Roof bolting.1 recent row ↗30 CFR 77.205Travelways at surface installations.1 recent row ↗30 CFR 75.364Weekly examination.1 recent row ↗

RECENT PUBLIC RECORDS

Recent violations and samples

Latest records retained for inspection; aggregates above use the full source history.

VIOLATIONS12 latest shown

Oct 8, 2026519224175.202(a)S&S

Oct 7, 2026519223975.342(a)(4)Citation

Oct 7, 2026519279675.1731(a)Citation

Oct 7, 2026519224075.400Citation

Oct 5, 2026519279575.1714-3(a)Citation

Oct 4, 2026519279475.204(c)(1)Citation

Sep 24, 2026519097577.205(a)Citation

Sep 23, 2026519149375.364(g)Citation

OTHER HEALTH SAMPLES8 latest shown

Coal dust, noise and other contaminants. Silica records above ↑

Oct 7, 2026

Coal dustOCCUPATION CODE NOT FOUND

.223 mg/m³Not voided

Oct 7, 2026