MINE DETAILS

SUFCO

ActiveUndergroundCoal (Bituminous)

MSHA MINE ID4200089

OPERATORCANYON FUEL COMPANY LLC

CONTROLLERWolverine Fuels LLC

LOCATIONSevier, UT

PUBLIC RECORD44,899 linked rows

LOCATION

Mine location

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

Mine coordinates

SUFCO38.91333, -111.41694Open map ↗

Quarterly trends

2025 Q1 – 2026 Q4

JSON CSV

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

Coal production

5,173,855

reported short tons

2025 Q1717,529
2025 Q21,002,527
2025 Q31,132,773
2025 Q4744,754
2026 Q1776,730
2026 Q2799,542
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Hours worked

1,293,228

reported employee hours

2025 Q1254,765
2025 Q2210,231
2025 Q3215,020
2025 Q4212,066
2026 Q1192,191
2026 Q2208,955
2026 Q3—No usable value reported
2026 Q4 *—No usable value reported

Tons per hour

4.00

production ÷ hours worked

2025 Q12.82
2025 Q24.77
2025 Q35.27
2025 Q43.51
2026 Q14.04
2026 Q23.83
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 SUFCO
Quarter	Coal (short tons)	Hours worked	Tons / hour	Avg. employees	Coverage
2025 Q1	717,529	254,765	2.82	415	1/1 mines reporting
2025 Q2	1,002,527	210,231	4.77	417	1/1 mines reporting
2025 Q3	1,132,773	215,020	5.27	403	1/1 mines reporting
2025 Q4	744,754	212,066	3.51	400	1/1 mines reporting
2026 Q1	776,730	192,191	4.04	406	1/1 mines reporting
2026 Q2	799,542	208,955	3.83	399	1/1 mines reporting
2026 Q3	—	—	—	—	No report
2026 Q4	—	—	—	—	No report

Safety and enforcement

2025-01-01 – 2026-10-13

Violations

349

40 significant & substantial (S&S)

2025 Q159
2025 Q239
2025 Q365
2025 Q435
2026 Q148
2026 Q248
2026 Q342
2026 Q4 *13

Accident records

0 records classified as fatality

2025 Q13
2025 Q23
2025 Q33
2025 Q45
2026 Q12
2026 Q21
2026 Q34
2026 Q4 *0

Proposed penalties · USD

212,998.00

320 of 349 violations with amounts

2025 Q146,329
2025 Q221,269
2025 Q330,262
2025 Q471,079
2026 Q124,477
2026 Q212,734
2026 Q36,848
2026 Q4 *—

On-site inspection hours

3,416.75

24 inspections · 24 with hours

2025 Q1436.75
2025 Q2383.25
2025 Q3590.00
2025 Q4482.50
2026 Q1502.00
2026 Q2513.75
2026 Q3481.00
2026 Q4 *27.50

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	59	7	46,329.00	3	1	436.8
2025-Q2	39	3	21,269.00	3	2	383.3
2025-Q3	65	5	30,262.00	3	5	590.0
2025-Q4	35	10	71,079.00	5	3	482.5
2026-Q1	48	7	24,477.00	2	3	502.0
2026-Q2	48	5	12,734.00	1	5	513.8
2026-Q3	42	2	6,848.00	4	4	481.0
2026-Q4 *	13	1	—	0	1	27.5

Most cited CFR sections

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

Section	Violations	S&S
30 CFR 75.400Accumulation of combustible materials.	54	3
30 CFR 75.1731Maintenance of belt conveyors and belt conveyor entries.	23	2
30 CFR 75.333Ventilation controls.	19	0
30 CFR 75.512Electric equipment; examination, testing and maintenance.	18	1
30 CFR 75.370Mine ventilation plan; submission and approval.	15	2
30 CFR 75.1909Nonpermissible diesel-powered equipment; design and performance requirements.	13	0
30 CFR 75.360Preshift examination at fixed intervals.	12	1
30 CFR 75.380Escapeways; bituminous and lignite mines.	12	4
30 CFR 75.503Permissible electric face equipment; maintenance.	12	0
30 CFR 75.1722Mechanical equipment guards.	11	7

Safety activity

violation2026-10-075036043
75.400
violation2026-10-075035197
75.601-1
violation2026-10-075035196
75.360(g)
violation2026-10-065035195
75.360(g)
violation2026-10-055036165
75.380(d)(4)
violation2026-10-055036164
75.1731(b)
violation2026-10-025036163
75.202(a) · S&S
violation2026-10-025036162
75.1725(a)
violation2026-10-025036161
75.400
violation2026-10-025035194
75.400
violation2026-10-025035193
75.1725(a)
violation2026-10-025035192
75.370(a)(1)
violation2026-10-025035191
75.400
inspection2026-10-01F007265
Regular Safety and Health Inspection · 27.5 on-site hours
inspection2026-09-29F01E44B
Compliance Follow-up Inspection · 2.3 on-site hours
violation2026-09-235030710
75.1916(c)
violation2026-09-025036038
75.1914(f)(2)
accident2026-09-01220262520001
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
While traveling in the mantrip, the mantrip was unable to maneuver the turn and struck a rib and power center, EE was thrusted forward from EE's seat.
accident2026-09-01220262510022
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
While traveling in the mantrip, the mantrip was unable to maneuver the turn and struck a rib and power center, employee was thrusted forward from their seat.
accident2026-09-01220262510021
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
While traveling in the mantrip, the mantrip was unable to maneuver the turn and struck a rib and power center, employee was thrusted forward from their seat
accident2026-09-01220262520003
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
While traveling in the mantrip, the mantrip was unable to maneuver the turn and struck a rib and power center, EE was thrusted forward from EE's seat.
inspection2026-09-01F01E44A
Non-Fatal Accident Investigation · 5.5 on-site hours
violation2026-09-015030708
Description not reported
violation2026-09-015030707
75.1916(b) · S&S
violation2026-09-015036355
75.803

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 TONS3,811,84924 rows · 2 receiving plants

HEAT CONTENT · BTU/LB11,242Weighted by reported tons

SULFUR / ASH · % BY WEIGHT0.81 / 11.80Separate averages over measured receipts

DELIVERED COST · USD/TON84.25100.0% of reported tons have usable costs

Quarterly receipts and quality

Quarter	Short tons	Heat · Btu/lb	Sulfur %	Ash %	Delivered USD/ton
2025-Q3 *	611,662	10,988	0.96	12.05	80.72
2025-Q4	1,048,901	11,149	0.85	11.71	81.03
2026-Q1	837,174	11,344	0.71	11.33	85.66
2026-Q2	927,534	11,292	0.77	12.38	87.51
2026-Q3 *	386,578	11,558	0.75	11.29	87.65

Month / source	Receiving plant / supplier	Short tons	Delivered USD/ton	Heat · Btu/lb	Sulfur %	Ash %	Purchase	Transport
2026-07EIA row 12137 · preliminary	Hunter6165 · UT · SUFCO	315,970	87.51	11,454	0.70	11.80	ContractBIT	Truck
2026-07EIA row 12485 · preliminary	Huntington8069 · UT · SUFCO	70,608	88.28	12,024	0.97	9.00	ContractBIT	Truck
2026-06EIA row 10229 · preliminary	Hunter6165 · UT · SUFCO	312,884	87.65	11,472	0.70	11.80	ContractBIT	Truck
2026-06EIA row 10536 · preliminary	Huntington8069 · UT · SUFCO	54,941	90.37	10,685	1.04	15.10	ContractBIT	Truck
2026-05EIA row 8368 · preliminary	Hunter6165 · UT · SUFCO	236,923	86.56	11,324	0.70	11.80	ContractBIT	Truck
2026-05EIA row 8651 · preliminary	Huntington8069 · UT · SUFCO	53,983	89.64	10,579	1.12	16.30	ContractBIT	Truck
2026-04EIA row 6569 · preliminary	Hunter6165 · UT · SUFCO	230,479	87.08	11,402	0.70	11.80	ContractBIT	Truck
2026-04EIA row 6873 · preliminary	Huntington8069 · UT · SUFCO	38,324	87.83	10,854	1.24	14.80	ContractBIT	Truck
2026-03EIA row 4746 · preliminary	Hunter6165 · UT · SUFCO	185,283	86.53	11,320	0.70	11.80	ContractBIT	Truck
2026-03EIA row 5042 · preliminary	Huntington8069 · UT · SUFCO	36,738	87.52	11,847	1.08	9.40	ContractBIT	Truck
2026-02EIA row 2815 · preliminary	Hunter6165 · UT · SUFCO	241,228	86.36	11,298	0.70	11.80	ContractBIT	Truck
2026-02EIA row 3140 · preliminary	Huntington8069 · UT · SUFCO	41,285	87.34	11,749	1.07	9.50	ContractBIT	Truck
2026-01EIA row 835 · preliminary	Hunter6165 · UT · SUFCO	279,755	83.63	11,157	0.70	11.80	ContractBIT	Truck
2026-01EIA row 1163 · preliminary	Huntington8069 · UT · SUFCO	52,885	87.60	11,957	0.36	7.90	ContractBIT	Truck
2025-12EIA row 34866 · final	Hunter6165 · UT · SUFCO	306,108	83.63	11,157	0.81	11.80	ContractBIT	Truck
2025-12EIA row 35466 · final	Huntington8069 · UT · SUFCO	42,359	85.41	10,615	1.21	14.20	ContractBIT	Truck
2025-11EIA row 31874 · final	Hunter6165 · UT · SUFCO	304,251	78.29	11,162	0.82	11.50	ContractBIT	Truck
2025-11EIA row 32453 · final	Huntington8069 · UT · SKYLINE MINE	62,877	83.08	12,027	0.38	8.90	ContractBIT	Truck
2025-10EIA row 28929 · final	Hunter6165 · UT · SUFCO	258,997	78.39	11,171	0.86	11.20	ContractBIT	Truck
2025-10EIA row 29513 · final	Huntington8069 · UT · SUFCO	74,309	86.54	10,549	1.24	14.90	ContractBIT	Truck
2025-09EIA row 25863 · final	Hunter6165 · UT · SUFCO	210,080	78.54	11,015	0.89	11.30	ContractBIT	Truck
2025-09EIA row 26459 · final	Huntington8069 · UT · SUFCO	74,715	86.73	10,855	1.22	12.50	ContractBIT	Truck
2025-08EIA row 22733 · final	Hunter6165 · UT · SUFCO	241,667	78.28	11,054	0.87	11.90	ContractBIT	Truck
2025-08EIA row 23367 · final	Huntington8069 · UT · SUFCO	85,200	87.71	10,850	1.15	13.90	ContractBIT	Truck

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
Sufco4200089 · Sevier, Utah	3,099,164	—	—	—	County sales or price not published1 eligible mines / 1 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 HIERARCHYWolverine Fuels LLC → CANYON FUEL COMPANY LLC → SUFCO

HISTORY RECORDS38 relationships

INTERVAL CHECKPASScontroller/operator overlap

Aug 17, 2013—CURRENT / OPEN

Wolverine Fuels LLCcontrolsCanyon Fuel Company LLCoperatesSUFCO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4200089

Feb 6, 1997—Aug 16, 2013

Arch Resources InccontrolsCanyon Fuel Company LLCoperatesSUFCO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4200089

Feb 1, 1970—Feb 5, 1997

El Paso Energy CorpcontrolsSouthern Utah Fuel CompanyoperatesSUFCO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4200089

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

222 historical accident/injury rows; 2 coded fatalities and 6,634 lost days across the published record.

ACCIDENT + INJURY RECORD54 since 2021

accidentsmine-production-quarterly

02 / COMPLIANCEwatch

Violations and penalties

5,047 violation rows across the full record; 775 carry an S&S flag and $2,439,707 appears in current assessed amounts.

ENFORCEMENT ACTIVITY1,207 since 2021

inspectionsviolationsassessed-violationsorders-107a

03 / HEALTHwatch

Occupational health samples

23,999 coal dust; 924 coal quartz; 940 noise. 0 personal-sample rows have a published C/E ratio above 1; 141 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 EXPOSURE26K samples

coal-dust-samplesquartz-samplesnoise-samples

04 / PRODUCTIONcontext

Quarterly production and employment

209K employee hours and 399 summed average employees across reported subunits in the latest published quarter.

2026-Q2800K tons

mine-production-quarterlymine-production-yearly

05 / LEGALwatch

Contests, conferences and decisions

93 contested-violation rows, 94 civil-penalty docket/decision rows, and 105 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE292 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 CONTEXT31 linked entities

contractor-production-quarterlycontractor-production-yearlyaccidentsviolations

07 / INSPECTIONScontext

Inspections

401 inspection events and 83K published inspection hours across the historical record.

OVERSIGHT COVERAGE62 since 2021

inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 924 silica records across the mine’s published history.

Matching records3333 coal · 0 personal · 0 area

Sample status33 not voided0 voided · 0 status not reported

Mean coal quartz concentration8.09 µg/m³33 eligible measurements · 0 missing concentration

Coal quartz concentration

Quarterly mean · µg/m³ · not-voided samples

2026-Q17.8513 measurements
2026-Q26.449 measurements
2026-Q39.7311 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 14, 2026–Sep 8, 2026
Date / sample	Dataset / analyte	Occupation / area	Measurement	Sample status	Published action
Sep 8, 202658544818 / lab 2026037342	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	1 µg/m³0.5% quartz	Not voided	Not reported
Sep 8, 202658544597 / lab 2026037336	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	0 µg/m³—% quartz	Not voided	Not reported
Sep 8, 202658544808 / lab 2026037337	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	0 µg/m³—% quartz	Not voided	Not reported
Jul 29, 202658542601 / lab 2026031486	Coal quartzQuartz	LONGWALL OPERATOR (TAILGATE SIDE)DESIGNATED OCCUPATION	26 µg/m³3.8% quartz	Not voided	Not reported
Jul 29, 202658542523 / lab 2026031488	Coal quartzQuartz	MECHANICNON DESIGNATED OCCUPATION	6 µg/m³2.2% quartz	Not voided	Not reported
Jul 29, 202658542304 / lab 2026031485	Coal quartzQuartz	JACK SETTER (LONGWALL)NON DESIGNATED OCCUPATION	36 µg/m³6.1% quartz	Not voided	Not reported
Jul 29, 202658542599 / lab 2026031487	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	9 µg/m³2.6% quartz	Not voided	Not reported
Jul 15, 202658542524 / lab 2026029326	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	11 µg/m³1.6% quartz	Not voided	Not reported
Jul 15, 202658542522 / lab 2026029323	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	4 µg/m³1% quartz	Not voided	Not reported
Jul 8, 202658538438 / lab 2026027892	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	3 µg/m³1.1% quartz	Not voided	Not reported
Jul 8, 202658538315 / lab 2026027889	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	11 µg/m³2.6% quartz	Not voided	Not reported
Jun 16, 202658538311 / lab 2026025291	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	4 µg/m³1.7% quartz	Not voided	Not reported
Jun 16, 202658538307 / lab 2026025289	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	2 µg/m³0.9% quartz	Not voided	Not reported
May 6, 202658538421 / lab 2026019357	Coal quartzQuartz	MECHANICNON DESIGNATED OCCUPATION	3 µg/m³1.1% quartz	Not voided	Not reported
May 6, 202658538432 / lab 2026019362	Coal quartzQuartz	OCCUPATION CODE NOT FOUNDINTAKE AIR	17 µg/m³4% quartz	Not voided	Not reported
May 6, 202658538406 / lab 2026019358	Coal quartzQuartz	LONGWALL OPERATOR (TAILGATE SIDE)DESIGNATED OCCUPATION	19 µg/m³3.8% quartz	Not voided	Not reported
Apr 28, 202658538409 / lab 2026018281	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	1 µg/m³0.4% quartz	Not voided	Not reported
Apr 28, 202658538309 / lab 2026018280	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	2 µg/m³0.6% quartz	Not voided	Not reported
Apr 21, 202658516730 / lab 2026017032	Coal quartzQuartz	ROOF BOLTER (TWIN HEAD) (RETURN SIDE)NON DESIGNATED OCCUPATION	8 µg/m³1.5% quartz	Not voided	Not reported
Apr 21, 202658516709 / lab 2026017030	Coal quartzQuartz	CONTINUOUS MINER OPERATORDESIGNATED OCCUPATION	2 µg/m³0.6% 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 PRODUCTION3,099,164short tons

LABOR HOURS: 865,964
AVG EMPLOYEES: 438
SUPPLY REGION: Uinta Region
UNION: No union code published
OPERATION: Mine only
COMPANY TYPE: Operating Subsidiary

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

TITLE 30 CROSSWALKCurrent through 2026-08-19

30 CFR 75.400Accumulation of combustible materials.3 recent rows ↗30 CFR 75.601-1Short circuit protection; ratings and settings of circuit breakers.1 recent row ↗30 CFR 75.360Preshift examination at fixed intervals.2 recent rows ↗30 CFR 75.380Escapeways; bituminous and lignite mines.1 recent row ↗30 CFR 75.1731Maintenance of belt conveyors and belt conveyor entries.1 recent row ↗30 CFR 75.202Protection from falls of roof, face and ribs.1 recent row ↗30 CFR 75.1725Machinery and equipment; operation and maintenance.2 recent rows ↗30 CFR 75.370Mine ventilation plan; submission and approval.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 7, 2026503604375.400Citation

Oct 7, 2026503519775.601-1Citation

Oct 7, 2026503519675.360(g)Citation

Oct 6, 2026503519575.360(g)Citation

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OTHER HEALTH SAMPLES8 latest shown

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

Oct 7, 2026