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U.S. MINING ENTITIES / OPERATOR / L01838

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Kilgore Contracting

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

MSHA OPERATOR IDL01838

MINE PORTFOLIO

55 of 55 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
Benjamin4202528 · Active6/8 quarters reportedUtah, UTSurface · MSHA: Construction Sand and Gravel026,32510127.3
Bluffdale Pit4202179 · Active6/8 quarters reportedUtah, UTSurface · MSHA: Construction Sand and Gravel056,19710131.5
Brigham Pit4202523 · Active6/8 quarters reportedBox Elder, UTSurface · MSHA: Construction Sand and Gravel012,00214028.5
Crusher 10504296 · Intermittent6/8 quarters reportedMesa, COSurface · MSHA: Construction Sand and Gravel015,2463018.3
Crusher 20504645 · Intermittent6/8 quarters reportedDelta, COSurface · MSHA: Construction Sand and Gravel018,8410015.0
Crusher 30504593 · Intermittent6/8 quarters reportedEmery, UTSurface · MSHA: Construction Sand and Gravel030,5101131.8
Crusher #60504746 · Intermittent5/8 quarters reportedMesa, COSurface · MSHA: Construction Sand and Gravel011,0760010.5
Erda Pit4201479 · Active6/8 quarters reportedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel06,406008.0
Gentry Pit1001668 · IntermittentMinidoka, IDSurface · MSHA: Construction Sand and Gravel——103.0
Grantsville Pit4202637 · Active6/8 quarters reportedTooele, UTSurface · MSHA: Construction Sand and Gravel020,41224045.0
Grey Goose0503869 · Intermittent6/8 quarters reportedGrand, COSurface · MSHA: Construction Sand and Gravel018,4693022.0
Herriman Pit4201823 · Active6/8 quarters reportedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel012,9484022.0
HIGHLAND PIT4200941 · Active6/8 quarters reportedUtah, UTSurface · MSHA: Construction Sand and Gravel036,75419335.8
HP 300 (Crusher 4)0504594 · Intermittent6/8 quarters reportedDelta, COSurface · MSHA: Construction Sand and Gravel07,6761020.5
Hyrum Pit4202360 · Active6/8 quarters reportedCache, UTSurface · MSHA: Construction Sand and Gravel035,72112036.5
Little Mountain4200400 · Intermittent3/8 quarters reportedBox Elder, UTSurface · MSHA: Construction Sand and Gravel0931504.8
Maryland Creek0503800 · Active6/8 quarters reportedSummit, COSurface · MSHA: Construction Sand and Gravel025,02017048.3
MONA PIT4202212 · Active6/8 quarters reportedJuab, UTSurface · MSHA: Construction Sand and Gravel046,6438037.8
Parley's Stone4202102 · Active6/8 quarters reportedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel026,97811041.8
Pit #1 43rd Ave0202867 · Active6/8 quarters reportedMaricopa, AZSurface · MSHA: Construction Sand and Gravel093,68816335.3
Plant 1 Avondale0203390 · Active6/8 quarters reportedMaricopa, AZSurface · MSHA: Construction Sand and Gravel028,97519133.5
Portable Crusher Unit F4202042 · Intermittent6/8 quarters reportedSweetwater, WYSurface · MSHA: Construction Sand and Gravel031,1097139.5
Stockton Pit4202480 · Active6/8 quarters reportedTooele, UTSurface · MSHA: Construction Sand and Gravel051,52610134.5
Walker Sand & Gravel1000772 · Intermittent6/8 quarters reportedBlaine, IDSurface · MSHA: Construction Sand and Gravel020,276228.5
Washplant 10504873 · Intermittent6/8 quarters reportedMesa, COSurface · MSHA: Construction Sand and Gravel04,7321012.5
Washplant 30504565 · Intermittent6/8 quarters reportedMesa, COSurface · MSHA: Construction Sand and Gravel06,045009.3
Washplant 40503809 · Active6/8 quarters reportedLa Plata, COSurface · MSHA: Construction Sand and Gravel03,9613021.0
WASHPLANT 54201736 · Intermittent6/8 quarters reportedGrand, UTSurface · MSHA: Construction Sand and Gravel07,8920044.5
Wellsville Pit4201960 · Intermittent6/8 quarters reportedCache, UTSurface · MSHA: Construction Sand and Gravel08,6762018.5
West Valley4201980 · Intermittent6/8 quarters reportedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel025,25312034.5
1976 PIONEER PLANT #10504046 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
19 Road Pit0503877 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
Bauer Pit4202465 · AbandonedTooele, UTSurface · MSHA: Construction Sand and Gravel——00—
BRADBURY PIT0503472 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
Buckeye Plant0203165 · Temporarily Idled6/8 quarters reportedMaricopa, AZSurface · MSHA: Construction Sand and Gravel0580001.0
CEDARAPIDS PLANT #2X3100503801 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
CEDAR RAPIDS PLANT #30504559 · AbandonedMoffat, COSurface · MSHA: Construction Sand and Gravel——00—
Cottonwood Quarry0505099 · Abandoned2/8 quarters reportedGrand, COSurface · MSHA: Construction Sand and Gravel00100.5
Crusher 50505047 · Temporarily Idled6/8 quarters reportedLa Plata, COSurface · MSHA: Construction Sand and Gravel01,9660013.0
Elam Pit0503937 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
Extec S-5 Track Mounted Screen sn96170502366 · AbandonedSummit, COSurface · MSHA: Construction Sand and Gravel——00—
Huffer Pit0501950 · AbandonedMesa, COSurface · MSHA: Construction Sand and Gravel——00—
Jaffee Pit0502139 · AbandonedPitkin, COSurface · MSHA: Construction Sand and Gravel——00—
KC-Portable 24801625 · AbandonedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——00—
KC (WY)-Portable 34801626 · AbandonedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——00—
Lewis & Lewis, Portable 014801482 · Abandoned1/8 quarters reportedSweetwater, WYSurface · MSHA: Construction Sand and Gravel0520101.0
Metso LT106 Track Mounted Jaw Crusher0504872 · AbandonedRoutt, COSurface · MSHA: Construction Sand and Gravel——00—
Mona4201545 · AbandonedSalt Lake, UTSurface · MSHA: Construction Sand and Gravel——00—
Portable Crusher Unit B4201963 · Abandoned6/8 quarters reportedBannock, IDSurface · MSHA: Construction Sand and Gravel05,849809.0
Portable-JCI 6203 Track Screen1002146 · AbandonedMinidoka, IDSurface · MSHA: Construction Sand and Gravel——00—
Powerscreen 2100-21002147 · AbandonedMinidoka, IDSurface · MSHA: Construction Sand and Gravel——00—
Roadrunner Screen1001916 · AbandonedMinidoka, IDSurface · MSHA: Construction Sand and Gravel——00—
Snowstorm Portable Plant0501013 · AbandonedClear Creek, COSurface · MSHA: Construction Sand and Gravel——00—
Track Plant 10504616 · Temporarily Idled6/8 quarters reportedRoutt, COSurface · MSHA: Construction Sand and Gravel040500—
Walker Sand & Gravel1002021 · AbandonedBlaine, IDSurface · MSHA: Construction Sand and Gravel——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

46 of 55 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 55 mines listed under this operator were checked; 35 have reports in the available quarters. Totals use current ownership.

Coal production

0

reported short tons

  1. 2025 Q1 *0
  2. 2025 Q2 *0
  3. 2025 Q3 *0
  4. 2025 Q4 *0
  5. 2026 Q1 *0
  6. 2026 Q2 *0
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Hours worked

699,608

reported employee hours

  1. 2025 Q1 *80,234
  2. 2025 Q2 *101,435
  3. 2025 Q3 *107,840
  4. 2025 Q4 *126,964
  5. 2026 Q1 *133,073
  6. 2026 Q2 *150,062
  7. 2026 Q3—No usable value reported
  8. 2026 Q4 *—No usable value reported

Tons per hour

0.00

production ÷ hours worked

  1. 2025 Q1 *0.00
  2. 2025 Q2 *0.00
  3. 2025 Q3 *0.00
  4. 2025 Q4 *0.00
  5. 2026 Q1 *0.00
  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 Arizona Materials
QuarterCoal (short tons)Hours workedTons / hourAvg. employeesCoverage
2025 Q1080,2340.0014532/35 mines reporting
2025 Q20101,4350.0016633/35 mines reporting
2025 Q30107,8400.0016532/35 mines reporting
2025 Q40126,9640.0020034/35 mines reporting
2026 Q10133,0730.0023333/35 mines reporting
2026 Q20150,0620.0024833/35 mines reporting
2026 Q3————No report
2026 Q4————No report

Safety and enforcement

2025-01-01 – 2026-10-18

Violations

225

42 significant & substantial (S&S)

  1. 2025 Q110
  2. 2025 Q259
  3. 2025 Q340
  4. 2025 Q444
  5. 2026 Q129
  6. 2026 Q221
  7. 2026 Q320
  8. 2026 Q4 *2

Accident records

14

0 records classified as fatality

  1. 2025 Q11
  2. 2025 Q21
  3. 2025 Q32
  4. 2025 Q40
  5. 2026 Q15
  6. 2026 Q25
  7. 2026 Q30
  8. 2026 Q4 *0

Proposed penalties · USD

101,634.00

213 of 225 violations with amounts

  1. 2025 Q11,818
  2. 2025 Q221,721
  3. 2025 Q314,751
  4. 2025 Q439,096
  5. 2026 Q111,254
  6. 2026 Q29,306
  7. 2026 Q33,688
  8. 2026 Q4 *—

On-site inspection hours

804.00

126 inspections · 126 with hours

  1. 2025 Q161.75
  2. 2025 Q2173.25
  3. 2025 Q3122.00
  4. 2025 Q4137.25
  5. 2026 Q168.50
  6. 2026 Q2109.00
  7. 2026 Q3118.25
  8. 2026 Q4 *14.00

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-Q11021,818.00101261.8
2025-Q2591421,721.001021173.3
2025-Q340714,751.002024122.0
2025-Q4441039,096.000021137.3
2026-Q129511,254.00501568.5
2026-Q22109,306.005015109.0
2026-Q32043,688.000016118.3
2026-Q4 *20—00214.0

Most cited CFR sections

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

SectionViolationsS&S
30 CFR 56.14107Moving machine parts.297
30 CFR 56.12004Electrical conductors.202
30 CFR 56.12032Inspection and cover plates.181
30 CFR 56.14100Safety defects; examination, correction and records.143
30 CFR 56.14112Construction and maintenance of guards.141
30 CFR 56.20003Housekeeping.103
30 CFR 56.4201Inspection.100
30 CFR 56.9300Berms or guardrails.97
30 CFR 56.12008Insulation and fittings for power wires and cables.80
30 CFR 56.11001Safe access.75

Safety activity

  1. violation5160737
    Plant 1 Avondale · 0203390

    56.4102 · S&S

  2. violation5160736
    Plant 1 Avondale · 0203390

    56.4102

  3. violation5160735
    Plant 1 Avondale · 0203390

    56.20003(a) · $313.00 proposed

  4. violation5160734
    Plant 1 Avondale · 0203390

    56.4102 · $465.00 proposed

  5. inspectionF03AA56
    Portable Crusher Unit B · 4201963

    Mine Idle Activity · 0.8 on-site hours

  6. violation5055889
    Portable Crusher Unit B · 4201963

    56.1000 · $151.00 proposed

  7. inspectionF045107
    Parley's Stone · 4202102

    Regular Safety and Health Inspection · 15.3 on-site hours

  8. violation5210726
    Parley's Stone · 4202102

    56.9301 · S&S · $313.00 proposed

  9. violation5210725
    Parley's Stone · 4202102

    56.12032 · $151.00 proposed

  10. violation5210724
    Parley's Stone · 4202102

    56.12008 · $151.00 proposed

  11. inspectionF037727
    Grantsville Pit · 4202637

    Regular Safety and Health Inspection · 5.5 on-site hours

  12. inspectionF036D4B
    MONA PIT · 4202212

    Regular Safety and Health Inspection · 9.3 on-site hours

  13. violation9906831
    MONA PIT · 4202212

    56.14107(a) · $151.00 proposed

  14. inspectionF03BA7E
    Bluffdale Pit · 4202179

    Regular Safety and Health Inspection · 15.5 on-site hours

  15. violation5210239
    Bluffdale Pit · 4202179

    56.12004 · $366.00 proposed

  16. inspectionF01621B
    Crusher #6 · 0504746

    Regular Safety and Health Inspection · 10.5 on-site hours

  17. inspectionF03BA7B
    Hyrum Pit · 4202360

    Regular Safety and Health Inspection · 7.5 on-site hours

  18. violation5210233
    Hyrum Pit · 4202360

    56.12004 · $151.00 proposed

  19. violation5210232
    Hyrum Pit · 4202360

    56.12032 · $151.00 proposed

  20. violation5210231
    Hyrum Pit · 4202360

    56.12004 · $151.00 proposed

  21. accident220262080012
    Walker Sand & Gravel · 1000772

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    On June 25, 2026, an employee sustained a forearm injury from a metal shard while realigning a wedged tail pulley bearing, which later required surgical removal and stitches on July 15, 2026.

  22. accident220261900023
    Walker Sand & Gravel · 1000772

    MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    EE was grinding on rusty metal, and dust went into EE's eyes.

  23. inspectionF036D45
    Stockton Pit · 4202480

    Regular Safety and Health Inspection · 15.8 on-site hours

  24. violation9906805
    Stockton Pit · 4202480

    56.14107(a) · $151.00 proposed

  25. violation9906804
    Stockton Pit · 4202480

    56.14107(a) · $151.00 proposed

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.

SELECTED PORTFOLIO

1 linked controller.

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

CONTROLLER / M02046Summit Materials LLC55 selected mines →