MINE DETAILS
Wyodak Mine
MSHA MINE ID4800083
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Wyodak Mine44.50917, -105.64250Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
5,010,323reported short tons
Hours worked
134,957reported employee hours
Tons per hour
37.13production ÷ hours worked
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
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 900,806 | 22,887 | 39.36 | 53 | 1/1 mines reporting |
| 2025 Q2 | 729,703 | 21,959 | 33.23 | 54 | 1/1 mines reporting |
| 2025 Q3 | 882,722 | 22,174 | 39.81 | 54 | 1/1 mines reporting |
| 2025 Q4 | 832,271 | 23,225 | 35.84 | 54 | 1/1 mines reporting |
| 2026 Q1 | 811,951 | 23,366 | 34.75 | 54 | 1/1 mines reporting |
| 2026 Q2 | 852,870 | 21,346 | 39.95 | 53 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
222 significant & substantial (S&S)
Accident records
10 records classified as fatality
Proposed penalties · USD
3,322.0022 of 22 violations with amounts
On-site inspection hours
290.256 inspections · 6 with hours
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 | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 2 | 0 | 302.00 | 0 | 0 | 1 | 72.8 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q3 | 6 | 0 | 906.00 | 0 | 0 | 1 | 78.5 |
| 2025-Q4 | 1 | 0 | 151.00 | 0 | 0 | 1 | 0.0 |
| 2026-Q1 | 6 | 0 | 906.00 | 0 | 0 | 2 | 82.3 |
| 2026-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q3 | 7 | 2 | 1,057.00 | 1 | 0 | 1 | 56.8 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
77.1605(k) · S&S · $151.00 proposed
77.1102 · $151.00 proposed
77.1607(b) · S&S · $151.00 proposed
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
Water truck operator stated EE blacked out while traveling west from the loading area. The truck traveled over the berm, tipped onto its side, slid down the pond slope, and came to rest upside down in the water. The operator regained consciousness, exited the truck, swam to shore, and walked up the hill for assistance. EE was transported to the hospital.
77.1710(a) · $151.00 proposed
77.202 · $151.00 proposed
77.1710(a) · $151.00 proposed
Regular Safety and Health Inspection · 56.8 on-site hours
77.1110 · $151.00 proposed
Compliance Follow-up Inspection · 12.3 on-site hours
77.502 · $151.00 proposed
77.502 · $151.00 proposed
77.410(b) · $151.00 proposed
47.44(b) · $151.00 proposed
77.701 · $151.00 proposed
77.807 · $151.00 proposed
Regular Safety and Health Inspection · 70.0 on-site hours
Compliance Follow-up Inspection · 0.0 on-site hours
71.206(a) · $151.00 proposed
77.208(d) · $151.00 proposed
77.505 · $151.00 proposed
77.202 · $151.00 proposed
77.502 · $151.00 proposed
77.1104 · $151.00 proposed
77.1110 · $151.00 proposed
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.
Quarterly receipts and quality
| Quarter | Short tons | Heat · Btu/lb | Sulfur % | Ash % | Delivered USD/ton | |
|---|---|---|---|---|---|---|
| 2025-Q3 * | 558,096 | 8,045 | 0.52 | 6.62 | 21.19 | |
| 2025-Q4 | 829,041 | 7,980 | 0.51 | 6.48 | 21.03 | |
| 2026-Q1 | 510,125 | 7,951 | 0.49 | 6.46 | 22.74 | |
| 2026-Q2 | 415,514 | 7,979 | 0.48 | 6.36 | 23.04 | |
| 2026-Q3 * | 195,291 | 7,975 | 0.47 | 6.44 | 22.82 |
| Month / source | Receiving plant / supplier | Short tons | Delivered USD/ton | Heat · Btu/lb | Sulfur % | Ash % | Purchase | Transport |
|---|---|---|---|---|---|---|---|---|
| 2026-07EIA row 12114 · preliminary | Wyodak6101 · WY · WYODAK COAL MINE | 152,460 | 22.82 | 7,985 | 0.47 | 6.40 | ContractSUB | Tram/conveyor |
| 2026-07EIA row 12952 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 42,831 | —Not published | 7,940 | 0.49 | 6.60 | ContractSUB | Tram/conveyor |
| 2026-06EIA row 10206 · preliminary | Wyodak6101 · WY · WYODAK | 109,259 | 22.45 | 8,002 | 0.48 | 6.40 | ContractSUB | Tram/conveyor |
| 2026-06EIA row 11004 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 39,128 | —Not published | 7,895 | 0.50 | 6.60 | ContractSUB | Tram/conveyor |
| 2026-05EIA row 8352 · preliminary | Wyodak6101 · WY · WYODAK | 117,045 | 23.34 | 7,994 | 0.48 | 6.20 | ContractSUB | Tram/conveyor |
| 2026-05EIA row 9101 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 21,593 | —Not published | 7,915 | 0.49 | 7.10 | ContractSUB | Tram/conveyor |
| 2026-04EIA row 6546 · preliminary | Wyodak6101 · WY · WYODAK | 92,463 | 23.36 | 7,999 | 0.50 | 6.30 | ContractSUB | Tram/conveyor |
| 2026-04EIA row 7323 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 36,026 | —Not published | 7,945 | 0.44 | 6.20 | ContractSUB | Tram/conveyor |
| 2026-03EIA row 4721 · preliminary | Wyodak6101 · WY · WYODAK | 97,289 | 23.04 | 7,955 | 0.48 | 6.60 | ContractSUB | Tram/conveyor |
| 2026-03EIA row 5505 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 37,152 | —Not published | 7,985 | 0.46 | 6.40 | ContractSUB | Tram/conveyor |
| 2026-02EIA row 2789 · preliminary | Wyodak6101 · WY · WYODAK | 148,241 | 22.96 | 7,954 | 0.47 | 6.20 | ContractSUB | Tram/conveyor |
| 2026-02EIA row 3633 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 34,297 | —Not published | 7,940 | 0.51 | 6.60 | ContractSUB | Tram/conveyor |
| 2026-01EIA row 808 · preliminary | Wyodak6101 · WY · WYODAK | 153,629 | 22.34 | 7,957 | 0.52 | 6.60 | ContractSUB | Tram/conveyor |
| 2026-01EIA row 1680 · preliminary | Wygen 155479 · WY · WYODAK COAL MINE | 39,517 | —Not published | 7,880 | 0.49 | 6.50 | ContractSUB | Tram/conveyor |
| 2025-12EIA row 34845 · final | Wyodak6101 · WY · WYODAK | 172,502 | 22.37 | 7,968 | 0.52 | 6.40 | ContractSUB | Tram/conveyor |
| 2025-12EIA row 35062 · final | Neil Simpson II7504 · WY · WYODAK RESOURCES | 34,988 | 16.42 | 8,050 | 0.52 | 6.70 | ContractSUB | Tram/conveyor |
| 2025-12EIA row 36318 · final | Wygen 155479 · WY · WYODAK COAL MINE | 33,829 | —Not published | 7,895 | 0.46 | 6.30 | ContractSUB | Tram/conveyor |
| 2025-12EIA row 36482 · final | Wygen 256319 · WY · WYODAK RESOURCES | 38,966 | 16.34 | 8,000 | 0.51 | 6.60 | ContractSUB | Tram/conveyor |
| 2025-12EIA row 36527 · final | Wygen III56596 · WY · WYODAK COAL MINE | 6,093 | 16.34 | 8,025 | 0.50 | 6.40 | ContractSUB | Tram/conveyor |
| 2025-11EIA row 31854 · final | Wyodak6101 · WY · WYODAK | 144,947 | 22.84 | 8,002 | 0.48 | 6.40 | ContractSUB | Tram/conveyor |
| 2025-11EIA row 32044 · final | Neil Simpson II7504 · WY · WYODAK RESOURCES | 40,862 | 20.74 | 8,050 | 0.52 | 6.70 | ContractSUB | Tram/conveyor |
| 2025-11EIA row 33321 · final | Wygen 155479 · WY · WYODAK COAL MINE | 29,761 | —Not published | 7,975 | 0.47 | 6.40 | ContractSUB | Tram/conveyor |
| 2025-11EIA row 33501 · final | Wygen 256319 · WY · WYODAK RESOURCES | 45,508 | 20.62 | 8,000 | 0.51 | 6.60 | ContractSUB | Tram/conveyor |
| 2025-11EIA row 33545 · final | Wygen III56596 · WY · WYODAK COAL MINE | 7,116 | 20.62 | 8,025 | 0.50 | 6.40 | ContractSUB | Tram/conveyor |
| 2025-10EIA row 28907 · final | Wyodak6101 · WY · WYODAK | 143,334 | 22.36 | 7,925 | 0.53 | 6.50 | ContractSUB | Tram/conveyor |
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.
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. All producing annual records in this selection have estimates. 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 |
|---|---|---|---|---|---|
| Wyodak Mine4800083 · Campbell, Wyoming | 3,686,049 | 13.96 | 3,685,770 | 51,453,344 | County allocation estimate2.17% of eligible county production11 eligible mines / 11 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.
—
Black Hills CorpcontrolsBlack Hills EnergyoperatesWyodak Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 4800083Other 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
59 historical accident/injury rows; 1 coded fatalities and 318 lost days across the published record.
ACCIDENT + INJURY RECORD6 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
316 violation rows across the full record; 54 carry an S&S flag and $191,687 appears in current assessed amounts.
ENFORCEMENT ACTIVITY60 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
560 coal dust; 8 coal quartz; 207 noise. 0 personal-sample rows have a published C/E ratio above 1; 2 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 EXPOSURE775 samples
coal-dust-samplesquartz-samplesnoise-samples04 / PRODUCTIONcontext
Quarterly production and employment
21K employee hours and 53 summed average employees across reported subunits in the latest published quarter.
2026-Q2853K tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
10 contested-violation rows, 10 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE23 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions06 / 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 CONTEXT25 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
131 inspection events and 6K published inspection hours across the historical record.
OVERSIGHT COVERAGE18 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 8 silica records across the mine’s published history.
Coal quartz concentration
Quarterly mean · µg/m³ · not-voided samples
— 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.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published action |
|---|---|---|---|---|---|
| No silica records match these filters. Missing samples do not establish safe conditions. | |||||
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.
ANNUAL COAL PRODUCTION3,686,049short tons
- LABOR HOURS
- 88,664
- AVG EMPLOYEES
- 53
- SUPPLY REGION
- Powder River Basin
- 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.
30 CFR 77.1605Loading and haulage equipment; installations.1 recent row ↗30 CFR 77.1102Warning signs; smoking and open flame.1 recent row ↗30 CFR 77.1607Loading and haulage equipment; operation.1 recent row ↗30 CFR 77.1710Protective clothing; requirements.2 recent rows ↗30 CFR 77.202Dust accumulations in surface installations.1 recent row ↗30 CFR 77.1110Examination and maintenance of firefighting equipment.1 recent row ↗30 CFR 77.502Electric equipment; examination, testing, and maintenance.2 recent rows ↗30 CFR 77.410Mobile equipment; automatic warning devices.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
503330677.1605(k)S&S
973263677.1102Citation
503330577.1607(b)S&S
503455477.1710(a)Citation
503455377.202Citation
503455277.1710(a)Citation
503455177.1110Citation
503352977.502Citation
Coal dust, noise and other contaminants. Silica records above ↑
Coal dustBULLDOZER OPERATOR
.031 mg/m³Not voided
Coal dustBULLDOZER OPERATOR
.02 mg/m³Not voided
Coal dustROAD GRADER OPERATOR
.017 mg/m³Not voided
Coal dustHIGHWALL DRILL OPERATOR
.078 mg/m³Not voided
Coal dustHIGHLIFT OPERATOR/FRONT END LOADER
.185 mg/m³Not voided
Coal dustHIGHLIFT OPERATOR/FRONT END LOADER
.098 mg/m³Not voided
NoiseBULLDOZER OPERATOR
PEL dose: 8%Action-level dose: 31%
NoiseHIGHLIFT OPERATOR/FRONT END LOADER
PEL dose: 9%Action-level dose: 40%
SOURCE COVERAGE
Reporting dates and coverage
17 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors59Feb 24, 2000—Aug 8, 2026mine-keyed
Addresses of Recordidentity · logistics1Jan 1, 1925—Jan 1, 1925mine-keyed
Assessed Violationscompliance · legal310May 2, 2002—Aug 20, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal10Oct 20, 2010—Dec 4, 2013mine-keyed
Coal Dust Sampleshealth · safety560Jun 8, 2000—Aug 20, 2026mine-keyed
Conferencescompliance · legal3Jul 10, 2012—May 3, 2016mine-keyed
Contested Violationscompliance · legal10May 19, 2008—Jan 4, 2013mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety4,090Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety954Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance1Jan 1, 1950—Jan 1, 1950mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance306Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance55Not published—Not publishedmine-keyed
Inspectionssafety · compliance131Jun 6, 2000—Aug 3, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety—No published rowsabsent / not applicable
Noise Sampleshealth · safety · equipment207Jun 7, 2000—Aug 11, 2026mine-keyed
Quartz Samples — Coalhealth · safety8Mar 7, 2006—Jan 20, 2022mine-keyed
Violationscompliance · safety · legal316May 2, 2002—Aug 20, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable
NOTES
Limitations
- Contractor production is entity-level and is never represented as mine-attributable.
- Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.