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U.S. MINING ENTITIES / CONTROLLER / 0176802

ACTIVE / CONTROLLER PORTFOLIO

Knife River Corporation

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

MSHA CONTROLLER ID0176802

MINE PORTFOLIO

45 of 45 mines and facilities

2025-01-01 – 2026-10-13. Active 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
Ball Road Quarry3503771 · Active6/8 quarters reportedClackamas, ORSurface · MSHA: Crushed, Broken Basalt028,3681013.3
Belgrade Pit2400462 · Active6/8 quarters reportedGallatin, MTSurface · MSHA: Construction Sand and Gravel062,4557039.0
Concrete, Inc DBA Knife River0405140 · Active6/8 quarters reportedSan Joaquin, CASurface · MSHA: Construction Sand and Gravel023,3978135.8
Corson Sand Plant / Quarry3901478 · Active6/8 quarters reportedMinnehaha, SDSurface · MSHA: Quartz, Ground035,28312345.8
Crusher #11002089 · Active6/8 quarters reportedAda, IDSurface · MSHA: Construction Sand and Gravel041,4439238.3
Crusher #21002088 · Active6/8 quarters reportedBonneville, IDSurface · MSHA: Construction Sand and Gravel022,9634032.3
Farmington Pit3500634 · Active6/8 quarters reportedWashington, ORSurface · MSHA: Crushed, Broken Traprock0104,1473275.8
FISHER ISLAND PLANT3500463 · Active6/8 quarters reportedBenton, ORSurface · MSHA: Crushed, Broken Traprock020,1433124.5
Grantsville Pit4202675 · Active6/8 quarters reportedTooele, UTSurface · MSHA: Construction Sand and Gravel045,3488233.3
Halawa Valley5100036 · Active6/8 quarters reportedHonolulu, HISurface · MSHA: Crushed, Broken Stone NEC0176,0247372.8
Hallwood Plant0401698 · Active6/8 quarters reportedYuba, CASurface · MSHA: Construction Sand and Gravel053,7105030.0
Honey Creek Quarry4105492 · Active6/8 quarters reportedBurnet, TXSurface · MSHA: Crushed, Broken Limestone NEC071,31919252.3
JTL Portable Crusher #32402414 · Active6/8 quarters reportedYellowstone, MTSurface · MSHA: Construction Sand and Gravel029,5511023.3
KEIZER PIT & PLANT3500503 · Active6/8 quarters reportedMarion, ORSurface · MSHA: Construction Sand and Gravel08,6580010.5
KIRTLAND3500512 · Active6/8 quarters reportedJackson, ORSurface · MSHA: Construction Sand and Gravel059,7202044.8
Knife River Construction Vernalis Plant0405459 · Active6/8 quarters reportedSan Joaquin, CASurface · MSHA: Construction Sand and Gravel055,5571036.0
Knife River Newman Aggregate0401774 · Active6/8 quarters reportedStanislaus, CASurface · MSHA: Construction Sand and Gravel015,6152132.3
Knife River Portable Plant SD-13900292 · Active6/8 quarters reportedMinnehaha, SDSurface · MSHA: Construction Sand and Gravel014,0090012.3
Kona Sand Plant5100245 · Active6/8 quarters reportedHawaii, HISurface · MSHA: Construction Sand and Gravel08,7651019.8
METRO PORTABLE #13503558 · Active6/8 quarters reportedColumbia, ORSurface · MSHA: Crushed, Broken Stone NEC010,958125.5
METRO PORTABLE #23503527 · Active6/8 quarters reportedMultnomah, ORSurface · MSHA: Crushed, Broken Stone NEC022,7711238.0
METRO PORTABLE #33500426 · Active6/8 quarters reportedColumbia, ORSurface · MSHA: Crushed, Broken Stone NEC054,9311030.0
METRO PORTABLE #43500495 · Active6/8 quarters reportedColumbia, WASurface · MSHA: Construction Sand and Gravel06,004002.8
Mobile Crusher #43503590 · Active6/8 quarters reportedCoos, ORSurface · MSHA: Construction Sand and Gravel09,447009.5
MURPHY CREEK3502875 · Active6/8 quarters reportedJosephine, ORSurface · MSHA: Crushed, Broken Stone NEC015,5944010.0
Orland Plant0405156 · Active6/8 quarters reportedGlenn, CASurface · MSHA: Construction Sand and Gravel037,1171023.8
PEBBLY BEACH QUARRY0400081 · Active6/8 quarters reportedLos Angeles, CASurface · MSHA: Crushed, Broken Stone NEC066,3591332.8
Portable-15100242 · Active6/8 quarters reportedHawaii, HISurface · MSHA: Crushed, Broken Stone NEC023,0645023.0
Puunene Quarry5100192 · Active6/8 quarters reportedMaui, HISurface · MSHA: Crushed, Broken Stone NEC056,4003148.5
REED PIT3502968 · Active6/8 quarters reportedMarion, ORSurface · MSHA: Construction Sand and Gravel091,8789363.3
ROGUE PORTABLE #23503595 · Active6/8 quarters reportedKlamath, ORSurface · MSHA: Crushed, Broken Stone NEC015,9525030.8
ROGUE PORTABLE #33503667 · Active6/8 quarters reportedJackson, ORSurface · MSHA: Crushed, Broken Stone NEC014,6063024.5
ROGUE PORTABLE #43503131 · Active6/8 quarters reportedJackson, ORSurface · MSHA: Crushed, Broken Traprock016,4180222.0
ROGUE PORTABLE #83503639 · Active6/8 quarters reportedDeschutes, ORSurface · MSHA: Crushed, Broken Stone NEC018,9924028.8
Scarmardo4105498 · Active6/8 quarters reportedBurleson, TXSurface · MSHA: Construction Sand and Gravel045,8523028.8
Sioux Falls Quarry3900008 · Active6/8 quarters reportedMinnehaha, SDSurface · MSHA: Crushed, Broken Quartzite0128,66620292.3
Skyhigh Pit4103931 · Active6/8 quarters reportedLimestone, TXSurface · MSHA: Crushed, Broken Limestone NEC074,24823187.0
Star Pit #14801383 · Active5/8 quarters reportedLaramie, WYSurface · MSHA: Construction Sand and Gravel042,96818052.5
STAYTON ROCK PIT3500521 · Active6/8 quarters reportedLinn, ORSurface · MSHA: Construction Sand and Gravel08,9101011.0
Waikapu Quarry5100171 · Active6/8 quarters reportedMaui, HISurface · MSHA: Crushed, Broken Stone NEC033,7769059.3
Waimea Quarry5100195 · Active5/8 quarters reportedHawaii, HISurface · MSHA: Crushed, Broken Stone NEC016,5603021.0
Wash Plant1002170 · Active6/8 quarters reportedBonneville, IDSurface · MSHA: Construction Sand and Gravel06,1331013.3
WATERVIEW3503605 · Active6/8 quarters reportedColumbia, ORSurface · MSHA: Construction Sand and Gravel046,0155035.3
WILLAMETTE PORTABLE #13503321 · Active6/8 quarters reportedClatsop, ORSurface · MSHA: Crushed, Broken Traprock07,3532019.0
WILLAMETTE PORTABLE #33503642 · Active6/8 quarters reportedLinn, ORSurface · MSHA: Crushed, Broken Stone NEC015,9403032.5

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

45 of 45 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-13Applies to production, safety and portfolio metrics. Silica samples have separate filters.

2025 Q1 – 2026 Q4

JSONCSV

Database snapshot · 2026-10-13. All 45 mines listed under this controller were checked; 45 have reports in the available quarters. Totals use current ownership.

Coal production

0

reported short tons

  1. 2025 Q10
  2. 2025 Q20
  3. 2025 Q30
  4. 2025 Q4 *0
  5. 2026 Q10
  6. 2026 Q2 *0
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Hours worked

1,763,387

reported employee hours

  1. 2025 Q1281,608
  2. 2025 Q2306,962
  3. 2025 Q3316,332
  4. 2025 Q4 *276,858
  5. 2026 Q1279,194
  6. 2026 Q2 *302,433
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Tons per hour

0.00

production ÷ hours worked

  1. 2025 Q10.00
  2. 2025 Q20.00
  3. 2025 Q30.00
  4. 2025 Q4 *0.00
  5. 2026 Q10.00
  6. 2026 Q2 *0.00
  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 Knife River Corporation
QuarterCoal (short tons)Hours workedTons / hourAvg. employeesCoverage
2025 Q10281,6080.0050245/45 mines reporting
2025 Q20306,9620.0052945/45 mines reporting
2025 Q30316,3320.0052745/45 mines reporting
2025 Q40276,8580.0051344/45 mines reporting
2026 Q10279,1940.0051245/45 mines reporting
2026 Q20302,4330.0051444/45 mines reporting
2026 Q3————No report
2026 Q4————No report

Safety and enforcement

2025-01-01 – 2026-10-13

Violations

219

33 significant & substantial (S&S)

  1. 2025 Q121
  2. 2025 Q256
  3. 2025 Q39
  4. 2025 Q433
  5. 2026 Q116
  6. 2026 Q252
  7. 2026 Q332
  8. 2026 Q4 *0

Accident records

33

0 records classified as fatality

  1. 2025 Q11
  2. 2025 Q22
  3. 2025 Q37
  4. 2025 Q41
  5. 2026 Q14
  6. 2026 Q27
  7. 2026 Q311
  8. 2026 Q4 *0

Proposed penalties · USD

87,354.00

208 of 219 violations with amounts

  1. 2025 Q111,244
  2. 2025 Q214,651
  3. 2025 Q31,359
  4. 2025 Q46,566
  5. 2026 Q119,653
  6. 2026 Q222,816
  7. 2026 Q311,065
  8. 2026 Q4 *—

On-site inspection hours

1,516.25

191 inspections · 191 with hours

  1. 2025 Q1146.00
  2. 2025 Q2307.75
  3. 2025 Q3101.75
  4. 2025 Q4234.25
  5. 2026 Q1244.25
  6. 2026 Q2255.25
  7. 2026 Q3227.00
  8. 2026 Q4 *—

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-Q121411,244.001023146.0
2025-Q256514,651.002036307.8
2025-Q3911,359.007016101.8
2025-Q43346,566.001029234.3
2026-Q116619,653.004026244.3
2026-Q252822,816.007025255.3
2026-Q332511,065.0011036227.0
2026-Q4 *00—000—

Most cited CFR sections

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

SectionViolationsS&S
30 CFR 56.12004Electrical conductors.301
30 CFR 56.14100Safety defects; examination, correction and records.172
30 CFR 56.14107Moving machine parts.131
30 CFR 56.4201Inspection.130
30 CFR 56.12032Inspection and cover plates.91
30 CFR 56.20003Housekeeping.73
30 CFR 50.30Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.60
30 CFR 56.11001Safe access.63
30 CFR 56.12028Testing grounding systems.60
30 CFR 56.14112Construction and maintenance of guards.60

Safety activity

  1. inspectionF050300
    REED PIT · 3502968

    Special Emphasis Programs · 0.8 on-site hours

  2. inspectionF005BEF
    Concrete, Inc DBA Knife River · 0405140

    Impoundment Spot Inspection · 0.0 on-site hours

  3. inspectionF046911
    Sioux Falls Quarry · 3900008

    Spot Inspection · 12.8 on-site hours

  4. inspectionF043817
    Halawa Valley · 5100036

    Other Technical Compliance Investigations · 0.0 on-site hours

  5. inspectionF036E03
    Hallwood Plant · 0401698

    Spot Inspection · 8.5 on-site hours

  6. violation5211392
    Star Pit #1 · 4801383

    56.20003(a)

  7. violation5211391
    Star Pit #1 · 4801383

    56.12004

  8. violation5211390
    Star Pit #1 · 4801383

    56.14132(b)(1)(i) · S&S

  9. inspectionF03FBDC
    Star Pit #1 · 4801383

    Regular Safety and Health Inspection · 14.5 on-site hours

  10. violation5211389
    Star Pit #1 · 4801383

    56.12032

  11. violation5211388
    Star Pit #1 · 4801383

    56.12032

  12. violation5211387
    Star Pit #1 · 4801383

    56.14107(a)

  13. inspectionF043814
    Halawa Valley · 5100036

    Other Technical Compliance Investigations · 0.0 on-site hours

  14. accident220262600016
    PEBBLY BEACH QUARRY · 0400081

    MACHINERY · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was cutting hoisting pins on 773F #16 when a hot piece of slag burned through their sock and boot causing a burn on their left ankle

  15. accident220262460032
    Halawa Valley · 5100036

    SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    While conducting a post-operational inspection of a water truck, the Team Member tripped while walking in the work area and lost balance. While attempting to brace the fall, the Team Member's right hand contacted a wheel lug, resulting in a laceration between the ring and little finger.

  16. violation9826396
    Grantsville Pit · 4202675

    50.30(a) · $151.00 proposed

  17. inspectionF043121
    Crusher #2 · 1002088

    Compliance Follow-up Inspection · 10.5 on-site hours

  18. inspectionF02C5A7
    PEBBLY BEACH QUARRY · 0400081

    Regular Safety and Health Inspection · 5.8 on-site hours

  19. inspectionF00B1E1
    Grantsville Pit · 4202675

    Verbal Hazard Complaint Inspections · 0.0 on-site hours

  20. inspectionF00B1E0
    Grantsville Pit · 4202675

    103 (g) Written Notification Hazard Complaint Inspectio · 2.0 on-site hours

  21. violation5160639
    FISHER ISLAND PLANT · 3500463

    56.14100(b) · $151.00 proposed

  22. violation5160638
    FISHER ISLAND PLANT · 3500463

    56.12004 · $151.00 proposed

  23. violation9826395
    Grantsville Pit · 4202675

    50.10(b) · $7,555.00 proposed

  24. inspectionF04298B
    FISHER ISLAND PLANT · 3500463

    Regular Safety and Health Inspection · 6.3 on-site hours

  25. violation5160637
    REED PIT · 3502968

    46.9(d)(1) · $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.

SELECTED PORTFOLIO

14 linked operators.

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

OPERATOR / L16679Knife River Corporation-Northwest18 selected mines →OPERATOR / L17688Knife River2 selected mines →OPERATOR / 0109965Knife River2 selected mines →OPERATOR / L15666Knife River - South Dakota3 selected mines →OPERATOR / 0190793Knife River Corporation Mountain West3 selected mines →OPERATOR / 0075003JTL GROUP,INC.1 selected mine →OPERATOR / 0052886Knife River Materials2 selected mines →OPERATOR / 0152673Knife River1 selected mine →OPERATOR / L08811Hawaiian Cement3 selected mines →OPERATOR / L14838Knife River Const2 selected mines →OPERATOR / 0065163Knife River Corporation South3 selected mines →OPERATOR / L17655Knife River Construction1 selected mine →OPERATOR / 0050680West Hawaii Concrete3 selected mines →OPERATOR / L17618Connolly-Pacific Company1 selected mine →