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U.S. MINING ENTITIES / CONTROLLER / C02111

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Kiewit Peter Sons' Inc

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

MSHA CONTROLLER IDC02111

MINE PORTFOLIO

5 of 5 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
Buckskin Mine4801200 · Active6/8 quarters reportedCampbell, WYSurface · MSHA: Coal (Bituminous)9,049,560384,697342274.3
Grindstone4105586 · Active6/8 quarters reportedPalo Pinto, TXSurface · MSHA: Crushed, Broken Limestone NEC0204,94526251.0
Big Horn Coal Co4800090 · AbandonedSheridan, WYSurface · MSHA: Coal (Bituminous)——00—
Colowyo Mine0502962 · NonProducing6/8 quarters reportedMoffat, COSurface · MSHA: Coal (Bituminous)920,029348,505137322.5
Rosebud Coal Sales Company4800084 · Abandoned and SealedCarbon, WYSurface · 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

5 of 5 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 5 mines listed under this controller were checked; 3 have reports in the available quarters. Totals use current ownership.

Coal production

9,969,589

reported short tons

  1. 2025 Q12,448,692
  2. 2025 Q21,789,593
  3. 2025 Q32,123,009
  4. 2025 Q41,372,055
  5. 2026 Q11,205,153
  6. 2026 Q21,031,087
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Hours worked

938,147

reported employee hours

  1. 2025 Q1169,417
  2. 2025 Q2173,458
  3. 2025 Q3164,992
  4. 2025 Q4168,862
  5. 2026 Q195,982
  6. 2026 Q2165,436
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Tons per hour

10.63

production ÷ hours worked

  1. 2025 Q114.45
  2. 2025 Q210.32
  3. 2025 Q312.87
  4. 2025 Q48.13
  5. 2026 Q112.56
  6. 2026 Q26.23
  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 Kiewit Peter Sons' Inc
QuarterCoal (short tons)Hours workedTons / hourAvg. employeesCoverage
2025 Q12,448,692169,41714.453493/3 mines reporting
2025 Q21,789,593173,45810.323413/3 mines reporting
2025 Q32,123,009164,99212.873023/3 mines reporting
2025 Q41,372,055168,8628.133183/3 mines reporting
2026 Q11,205,15395,98212.561763/3 mines reporting
2026 Q21,031,087165,4366.233113/3 mines reporting
2026 Q3————No report
2026 Q4————No report

Safety and enforcement

2025-01-01 – 2026-10-18

Violations

73

13 significant & substantial (S&S)

  1. 2025 Q18
  2. 2025 Q21
  3. 2025 Q317
  4. 2025 Q47
  5. 2026 Q112
  6. 2026 Q211
  7. 2026 Q317
  8. 2026 Q4 *0

Accident records

11

0 records classified as fatality

  1. 2025 Q11
  2. 2025 Q24
  3. 2025 Q33
  4. 2025 Q41
  5. 2026 Q11
  6. 2026 Q20
  7. 2026 Q31
  8. 2026 Q4 *0

Proposed penalties · USD

26,785.00

62 of 73 violations with amounts

  1. 2025 Q11,324
  2. 2025 Q21,320
  3. 2025 Q39,798
  4. 2025 Q41,547
  5. 2026 Q17,818
  6. 2026 Q23,921
  7. 2026 Q31,057
  8. 2026 Q4 *—

On-site inspection hours

647.75

19 inspections · 19 with hours

  1. 2025 Q1113.50
  2. 2025 Q2100.75
  3. 2025 Q389.50
  4. 2025 Q416.50
  5. 2026 Q1151.50
  6. 2026 Q223.50
  7. 2026 Q3145.25
  8. 2026 Q4 *7.25

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-Q1801,324.00102113.5
2025-Q2111,320.00404100.8
2025-Q31759,798.0030289.5
2025-Q4711,547.0010216.5
2026-Q11227,818.00103151.5
2026-Q21123,921.0000223.5
2026-Q31721,057.00103145.3
2026-Q4 *00—0017.3

Most cited CFR sections

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

SectionViolationsS&S
30 CFR 77.1110Examination and maintenance of firefighting equipment.90
30 CFR 77.404Machinery and equipment; operation and maintenance.73
30 CFR 56.12004Electrical conductors.40
30 CFR 77.1104Accumulations of combustible materials.42
30 CFR 50.30Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.30
30 CFR 56.14100Safety defects; examination, correction and records.30
30 CFR 77.502Electric equipment; examination, testing, and maintenance.30
30 CFR 56.20003Housekeeping.21
30 CFR 56.4201Inspection.20
30 CFR 77.1605Loading and haulage equipment; installations.22

Safety activity

  1. violation5031896
    Colowyo Mine · 0502962

    77.1110 · $883.00 proposed

  2. accident220253520003
    Grindstone · 4105586

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee's right pinky finger was crushed between a 3" pipe and receiver hitch on a pickup resulting in a fracture of said pinky finger.

  3. violation9678157
    Grindstone · 4105586

    56.4104(b) · $151.00 proposed

  4. violation9678156
    Grindstone · 4105586

    56.12004 · $267.00 proposed

  5. violation9678155
    Grindstone · 4105586

    56.12004 · $267.00 proposed

  6. violation9678154
    Grindstone · 4105586

    56.20003(a) · $267.00 proposed

  7. violation9678153
    Grindstone · 4105586

    56.12004 · $267.00 proposed

  8. violation9678152
    Grindstone · 4105586

    56.15004 · S&S · $177.00 proposed

  9. violation9678151
    Grindstone · 4105586

    56.14100(c) · $151.00 proposed

  10. inspectionF0048FF
    Grindstone · 4105586

    Regular Safety and Health Inspection · 14.8 on-site hours

  11. inspectionF0065CB
    Buckskin Mine · 4801200

    Compliance Follow-up Inspection · 1.8 on-site hours

  12. violation5034125
    Buckskin Mine · 4801200

    77.807 · $151.00 proposed

  13. violation5034124
    Buckskin Mine · 4801200

    47.42(a) · $177.00 proposed

  14. violation5033706
    Buckskin Mine · 4801200

    77.205(b) · $177.00 proposed

  15. violation9732353
    Buckskin Mine · 4801200

    77.509(c) · $177.00 proposed

  16. violation9732352
    Buckskin Mine · 4801200

    77.502 · $177.00 proposed

  17. violation9732351
    Buckskin Mine · 4801200

    77.800 · $177.00 proposed

  18. violation5034123
    Buckskin Mine · 4801200

    77.404(a) · S&S · $592.00 proposed

  19. violation5034122
    Buckskin Mine · 4801200

    77.1104 · $151.00 proposed

  20. violation5034121
    Buckskin Mine · 4801200

    77.404(a) · S&S · $592.00 proposed

  21. violation5034120
    Buckskin Mine · 4801200

    77.1104 · $151.00 proposed

  22. violation9732350
    Buckskin Mine · 4801200

    77.900 · S&S · $2,936.00 proposed

  23. violation9732597
    Buckskin Mine · 4801200

    45.4(b) · $151.00 proposed

  24. accident220252610019
    Buckskin Mine · 4801200

    FIRE · ACCIDENT ONLY

    Accident narrative

    We had another smoker start up and we have all our rubber tire dozers down. We are waiting to get a tire replaced on a rubber tire dozer then it will go out and put the smoker out.

  25. accident220252610018
    Buckskin Mine · 4801200

    FIRE · ACCIDENT ONLY

    Accident narrative

    We had a Smoker on our Anderson coal seam bench. We got our RTD working on getting them out.

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 TONS6,015,80185 rows · 8 receiving plants
HEAT CONTENT · BTU/LB8,503Weighted by reported tons
SULFUR / ASH · % BY WEIGHT0.33 / 5.34Separate averages over measured receipts
DELIVERED COST · USD/TON51.8544.8% of reported tons have usable costs
Quarterly receipts and quality
QuarterShort tonsHeat · Btu/lbSulfur %Ash %Delivered USD/ton
2025-Q3 *1,563,9458,4080.295.1943.94
2025-Q41,405,4878,2290.405.3645.41
2026-Q11,362,9438,5770.335.1455.07
2026-Q21,359,8748,8070.355.9462.09
2026-Q3 *323,5528,5710.244.2748.60
Month / sourceMineReceiving plant / supplierShort tonsDelivered USD/tonHeat · Btu/lbSulfur %Ash %PurchaseTransport
2026-07EIA row 11526 · preliminaryBUCKSKIN MINE4801200Muscatine Plant #11167 · IA · BUCKSKIN58,57340.378,5720.234.30SpotSUBRail
2026-07EIA row 11899 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN62,032—Not published8,6100.264.20ContractSUBRail
2026-07EIA row 11900 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN138,996—Not published8,5350.234.30ContractSUBRail
2026-07EIA row 12202 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO15,99556.168,6340.264.30ContractSUBRail
2026-07EIA row 12204 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO47,95656.138,6010.234.20ContractSUBRail
2026-06EIA row 9474 · preliminaryBUCKSKIN MINE4801200Limestone298 · TX · BUCKSKIN15,509—Not published8,4950.314.60ContractSUBRail
2026-06EIA row 9641 · preliminaryBUCKSKIN MINE4801200Muscatine Plant #11167 · IA · BUCKSKIN58,59039.768,5730.274.50SpotSUBRail
2026-06EIA row 10005 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN138,336—Not published8,5200.284.60ContractSUBRail
2026-06EIA row 10008 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN62,031—Not published8,6600.264.50ContractSUBRail
2026-06EIA row 10108 · preliminaryCOLOWYO MINE0502962Craig (CO)6021 · CO · COLOWYO MINE57,74277.969,5520.389.40ContractSUBRail
2026-06EIA row 10294 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO15,97555.938,6440.274.20ContractSUBRail
2026-06EIA row 10295 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO63,21154.948,5400.284.50ContractSUBRail
2026-05EIA row 7834 · preliminaryBUCKSKIN MINE4801200Muscatine Plant #11167 · IA · BUCKSKIN73,08538.868,4770.304.90SpotSUBRail
2026-05EIA row 8164 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN31,036—Not published8,5000.394.90ContractSUBRail
2026-05EIA row 8165 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN155,095—Not published8,5100.294.90ContractSUBRail
2026-05EIA row 8262 · preliminaryCOLOWYO MINE0502962Craig (CO)6021 · CO · COLOWYO MINE128,36877.429,4900.4110.30ContractSUBRail
2026-05EIA row 8428 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO15,97050.668,5690.404.90ContractSUBRail
2026-05EIA row 8434 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO63,40853.168,4930.314.90ContractSUBRail
2026-04EIA row 5864 · preliminaryBUCKSKIN MINE4801200Limestone298 · TX · BUCKSKIN46,719—Not published8,4850.395.30ContractSUBRail
2026-04EIA row 6001 · preliminaryBUCKSKIN MINE4801200Muscatine Plant #11167 · IA · BUCKSKIN58,61937.478,4660.805.00SpotSUBRail
2026-04EIA row 6347 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN77,094—Not published8,5550.414.90ContractSUBRail
2026-04EIA row 6348 · preliminaryBUCKSKIN MINE4801200W A Parish3470 · TX · BUCKSKIN108,554—Not published8,4750.375.00ContractSUBRail
2026-04EIA row 6457 · preliminaryCOLOWYO MINE0502962Craig (CO)6021 · CO · COLOWYO MINE174,55179.559,6960.348.10ContractSUBRail
2026-04EIA row 6642 · preliminaryBUCKSKIN MINE4801200Scherer6257 · GA · BUCKSKIN MINING CO15,98150.578,4740.364.70ContractSUBRail
2026-03EIA row 4010 · preliminaryBUCKSKIN MINE4801200Limestone298 · TX · BUCKSKIN15,517—Not published8,5300.314.80ContractSUBRail

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/TON22.52Weighted by estimated sales of covered mines
ESTIMATED SALES · SHORT TONS8,480,841Allocated from published county sales
ESTIMATED COAL REVENUE · USD191,018,720Covered mines only · not reported revenue
ANNUAL PRODUCTION COVERED100.0%2 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. 2 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
Colowyo Mine0502962 · Moffat, Colorado1,713,91955.971,728,78396,759,987County allocation estimate32.95% of eligible county production4 eligible mines / 4 sales respondents
Buckskin Mine4801200 · Campbell, Wyoming6,752,57013.966,752,05894,258,733County allocation estimate3.97% of eligible county production11 eligible mines / 11 sales respondents
Rosebud Coal Sales Company4800084 · Location unavailable————No matching annual production record
Big Horn Coal Co4800090 · 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

4 linked operators.

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

OPERATOR / 0138733Buckskin Mining Company1 selected mine →OPERATOR / 0053919Kiewit Mining Group2 selected mines →OPERATOR / P02453Big Horn Coal Co1 selected mine →OPERATOR / P02454Rosebud Coal Sales Company1 selected mine →