ACTIVE / CONTROLLER PORTFOLIO

Summit Materials LLC

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

MSHA CONTROLLER IDM02046

MINE PORTFOLIO

40 of 40 mines and facilities

2025-01-01 – 2026-10-17. Active records; production reporting is not required.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
Atoka Quarry3402026 · ActiveAtoka, OKSurface · MSHA: Crushed, Broken Limestone NEC——3029.8
Benjamin4202528 · ActiveUtah, UTSurface · MSHA: Construction Sand and Gravel——10127.3
Bluffdale Pit4202179 · ActiveUtah, UTSurface · MSHA: Construction Sand and Gravel——10131.5
Brigham Pit4202523 · ActiveBox Elder, UTSurface · MSHA: Construction Sand and Gravel——14028.5
Coleman Quarry-SCS Materials3402240 · ActiveAtoka, OKSurface · MSHA: Dimension Limestone——15140.3
Columbus Plant4104393 · ActiveColorado, TXSurface · MSHA: Construction Sand and Gravel——5133.0
Crusher LU300-LU4004102577 · ActiveGlasscock, TXSurface · MSHA: Crushed, Broken Stone NEC——7145.0
Duncan Plant4105187 · ActiveColorado, TXSurface · MSHA: Sand, Industrial NEC——7228.8
Durbin Quarry1401719 · ActiveElk, KSSurface · MSHA: Crushed, Broken Limestone NEC——6026.8
Eagle Lake Plant4104889 · ActiveColorado, TXSurface · MSHA: Construction Sand and Gravel——7139.5
Ellinger Plant4104154 · ActiveFayette, TXSurface · MSHA: Construction Sand and Gravel——4037.5
Erda Pit4201479 · ActiveSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——008.0
Grantsville Pit4202637 · ActiveTooele, UTSurface · MSHA: Construction Sand and Gravel——24045.0
Hanna's Bend Plant4104631 · ActiveLiberty, TXSurface · MSHA: Construction Sand and Gravel——8132.5
Hays Quarry4104514 · ActiveHays, TXSurface · MSHA: Crushed, Broken Limestone NEC——7242.3
Herriman Pit4201823 · ActiveSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——4022.0
HIGHLAND PIT4200941 · ActiveUtah, UTSurface · MSHA: Construction Sand and Gravel——19335.8
Hockley Plant4103491 · ActiveHarris, TXSurface · MSHA: Construction Sand and Gravel——9034.0
Hyrum Pit4202360 · ActiveCache, UTSurface · MSHA: Construction Sand and Gravel——12036.5
Maryland Creek0503800 · ActiveSummit, COSurface · MSHA: Construction Sand and Gravel——17048.3
MONA PIT4202212 · ActiveJuab, UTSurface · MSHA: Construction Sand and Gravel——8037.8
Oxford Sand and Gravel1400522 · ActiveSumner, KSSurface · MSHA: Construction Sand and Gravel——18061.0
Parley's Stone4202102 · ActiveSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——11041.8
Pit #1 43rd Ave0202867 · ActiveMaricopa, AZSurface · MSHA: Construction Sand and Gravel——16335.3
Plant 1 Avondale0203390 · ActiveMaricopa, AZSurface · MSHA: Construction Sand and Gravel——19133.5
Pope's Point3401930 · ActiveBryan, OKSurface · MSHA: Sand, Industrial NEC——9045.5
Portable Plant #21401463 · ActiveCrawford, KSSurface · MSHA: Crushed, Broken Stone NEC——1232.3
Portable Plant #31401464 · ActiveWilson, KSSurface · MSHA: Crushed, Broken Limestone NEC——7033.0
Portable Plant #61401828 · ActiveNeosho, KSSurface · MSHA: Crushed, Broken Limestone NEC——3133.3
Sawyer Quarry3401950 · ActiveChoctaw, OKSurface · MSHA: Crushed, Broken Sandstone——11087.5
SEVERY QUARRY1401584 · ActiveGreenwood, KSSurface · MSHA: Crushed, Broken Limestone NEC——7030.0
Smith Plant4105210 · ActiveColorado, TXSurface · MSHA: Crushed, Broken Stone NEC——6036.8
SPRING PLANT4105125 · ActiveHarris, TXSurface · MSHA: Construction Sand and Gravel——6240.5
STEWART STONE MITCHELL3401400 · ActivePawnee, OKSurface · MSHA: Crushed, Broken Limestone NEC——15037.8
Stockton Pit4202480 · ActiveTooele, UTSurface · MSHA: Construction Sand and Gravel——10134.5
Vines Sand & Gravel4103348 · ActiveWard, TXSurface · MSHA: Construction Sand and Gravel——4035.5
Vox Plant4105081 · ActiveColorado, TXSurface · MSHA: Construction Sand and Gravel——5022.8
Washplant 40503809 · ActiveLa Plata, COSurface · MSHA: Construction Sand and Gravel——3021.0
Wegenhoft Plant4102916 · ActiveFayette, TXSurface · MSHA: Construction Sand and Gravel——4038.0
Wichita Sand and Gravel1400543 · ActiveSedgwick, KSSurface · MSHA: Construction Sand and Gravel——30064.8

LOCATION

Portfolio map

40 of 40 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-17Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

381

53 significant & substantial (S&S)

  1. 2025 Q145
  2. 2025 Q292
  3. 2025 Q340
  4. 2025 Q445
  5. 2026 Q177
  6. 2026 Q238
  7. 2026 Q338
  8. 2026 Q4 *6

Accident records

24

0 records classified as fatality

  1. 2025 Q12
  2. 2025 Q20
  3. 2025 Q35
  4. 2025 Q43
  5. 2026 Q16
  6. 2026 Q24
  7. 2026 Q34
  8. 2026 Q4 *0

Proposed penalties · USD

143,602.00

366 of 381 violations with amounts

  1. 2025 Q110,989
  2. 2025 Q230,947
  3. 2025 Q314,793
  4. 2025 Q434,389
  5. 2026 Q129,524
  6. 2026 Q213,431
  7. 2026 Q39,529
  8. 2026 Q4 *—

On-site inspection hours

1,474.25

191 inspections · 191 with hours

  1. 2025 Q1219.50
  2. 2025 Q2261.25
  3. 2025 Q3163.50
  4. 2025 Q4170.25
  5. 2026 Q1253.75
  6. 2026 Q2173.75
  7. 2026 Q3218.25
  8. 2026 Q4 *14.00
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q145910,989.002025219.5
2025-Q2921230,947.000031261.3
2025-Q340614,793.005027163.5
2025-Q4451134,389.003024170.3
2026-Q177829,524.006031253.8
2026-Q238313,431.004023173.8
2026-Q33849,529.004026218.3
2026-Q4 *60—00414.0

Most cited CFR sections

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

Safety activity

  1. violation5210239
    Bluffdale Pit · 4202179

    56.12004 · $366.00 proposed

  2. violation5174405
    Wegenhoft Plant · 4102916

    56.14100(b) · $151.00 proposed

  3. inspectionF043FF1
    Wegenhoft Plant · 4102916

    Regular Safety and Health Inspection · 8.5 on-site hours

  4. inspectionF03BA7B
    Hyrum Pit · 4202360

    Regular Safety and Health Inspection · 7.5 on-site hours

  5. violation5210233
    Hyrum Pit · 4202360

    56.12004 · $151.00 proposed

  6. violation5210232
    Hyrum Pit · 4202360

    56.12032 · $151.00 proposed

  7. violation5210231
    Hyrum Pit · 4202360

    56.12004 · $151.00 proposed

  8. inspectionF036D45
    Stockton Pit · 4202480

    Regular Safety and Health Inspection · 15.8 on-site hours

  9. violation9906805
    Stockton Pit · 4202480

    56.14107(a) · $151.00 proposed

  10. violation9906804
    Stockton Pit · 4202480

    56.14107(a) · $151.00 proposed

  11. violation9906803
    Stockton Pit · 4202480

    56.14112(b) · $151.00 proposed

  12. inspectionF02CC86
    Oxford Sand and Gravel · 1400522

    Regular Safety and Health Inspection · 14.3 on-site hours

  13. violation5042967
    Oxford Sand and Gravel · 1400522

    56.12004 · $1,126.00 proposed

  14. inspectionF03E086
    Duncan Plant · 4105187

    Regular Safety and Health Inspection · 16.0 on-site hours

  15. violation5009384
    SPRING PLANT · 4105125

    56.20003(a) · S&S · $209.00 proposed

  16. violation5174840
    Duncan Plant · 4105187

    56.4101 · $151.00 proposed

  17. inspectionF02F5C9
    SPRING PLANT · 4105125

    Regular Safety and Health Inspection · 16.0 on-site hours

  18. violation5009383
    SPRING PLANT · 4105125

    56.14103(b) · $267.00 proposed

  19. violation5009382
    SPRING PLANT · 4105125

    56.11001 · S&S · $398.00 proposed

  20. inspectionF031F16
    Hanna's Bend Plant · 4104631

    Regular Safety and Health Inspection · 5.3 on-site hours

  21. violation5007987
    Hanna's Bend Plant · 4104631

    56.14207 · $151.00 proposed

  22. inspectionF02BB5A
    Maryland Creek · 0503800

    Regular Safety and Health Inspection · 13.8 on-site hours

  23. violation5211335
    Maryland Creek · 0503800

    56.14205 · $642.00 proposed

  24. violation5211334
    Maryland Creek · 0503800

    56.4130(b) · $193.00 proposed

  25. accident220261590030
    Benjamin · 4202528

    POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    An employee was cleaning accumulated mud from around a machine guard when their tool contacted the moving conveyor belt. This contact caused the tool to pull forward, pinching the employee's hand against the gearbox. The incident resulted in lacerations that required medical treatment, including stitches.

Safety sources and definitions

MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.

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

8 linked operators.

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