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. violation5055479
    Benjamin · 4202528

    56.12004 · $151.00 proposed

  2. violation5058366
    HIGHLAND PIT · 4200941

    41.12 · $151.00 proposed

  3. inspectionF0211F0
    Washplant 4 · 0503809

    Regular Safety and Health Inspection · 4.5 on-site hours

  4. violation5037348
    Washplant 4 · 0503809

    56.18002(b) · $151.00 proposed

  5. accident220261100022
    Pit #1 43rd Ave · 0202867

    HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE was changing screens at the washplant and was cutting a piece of rubber using a utility knife. During the cutting motion the knife slipped past the rubber and stabbed the EEs thumb.

  6. violation9826361
    HIGHLAND PIT · 4200941

    56.20010 · $151.00 proposed

  7. accident220261100005
    HIGHLAND PIT · 4200941

    INUNDATION · ACCIDENT ONLY

    Accident narrative

    Highland city started to fill the canal earlier than what was communicated. When the canal was filled (pressurized) the valve that feeds water to the plant was in an open position to prevent water from freezing over the winter months. With the canal being pressurized and the valve in the open position, water started to flow into the pond causing the damn embankment to fail.

  8. inspectionF02DDA7
    Columbus Plant · 4104393

    Regular Safety and Health Inspection · 5.3 on-site hours

  9. inspectionF02D43E
    HIGHLAND PIT · 4200941

    Regular Safety and Health Inspection · 6.8 on-site hours

  10. inspectionF03A027
    Brigham Pit · 4202523

    Regular Safety and Health Inspection · 6.0 on-site hours

  11. violation5058357
    HIGHLAND PIT · 4200941

    47.41(a) · $465.00 proposed

  12. violation5058356
    HIGHLAND PIT · 4200941

    56.14107(a) · $3,448.00 proposed

  13. violation5058355
    HIGHLAND PIT · 4200941

    56.14107(a) · $465.00 proposed

  14. violation5058354
    HIGHLAND PIT · 4200941

    56.14107(a) · $465.00 proposed

  15. violation5055839
    Brigham Pit · 4202523

    56.12004 · $959.00 proposed

  16. accident220260980003
    Columbus Plant · 4104393

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE stepped on platform of an isolated catwalk that collapsed beneath them causing them to fall approximately 7 feet to the next level. EE sustained superficial lacerations and bruising/soreness.

  17. inspectionF042CF0
    Pope's Point · 3401930

    Regular Safety and Health Inspection · 7.8 on-site hours

  18. violation5172239
    Pope's Point · 3401930

    56.20003(a) · $151.00 proposed

  19. accident220260990010
    Pit #1 43rd Ave · 0202867

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    While cleaning in the wash plant tunnel, employee slipped on aggregate material on the floor and hurt EE's knee. EE requested to be evaluated at the occupational clinic where they prescribed restrictions along with medication for the knee injury.

  20. inspectionF042CEF
    Pope's Point · 3401930

    Spot Inspection · 6.5 on-site hours

  21. inspectionF0370D5
    Plant 1 Avondale · 0203390

    Compliance Follow-up Inspection · 0.8 on-site hours

  22. accident220260920015
    Portable Plant #6 · 1401828

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was running through the plant area and felt a pop in EE's left hamstring area. Injury is believed to be a strained or pulled hamstring.

  23. inspectionF02CC76
    Oxford Sand and Gravel · 1400522

    Compliance Follow-up Inspection · 0.8 on-site hours

  24. inspectionF02CC77
    Wichita Sand and Gravel · 1400543

    Compliance Follow-up Inspection · 0.8 on-site hours

  25. accident220260890013
    HIGHLAND PIT · 4200941

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

    Accident narrative

    EE was rotating the sand screws manually by grabbing a hold of the V-belts, as the EE was rotating the sand screws the EE's middle and ring finger was caught between the V-belt and Sheeve causing a Turf Fracture to the tip of the ring finger.

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.