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Stockton Pit: 65 MSHA citations Metal/Non-Metal

Kilgore Contracting · Surface
Controlled by Summit Materials LLC
Stockton, Tooele County, UT  ·  Active
MSHA Mine ID: 4202480

Stockton Pit has $15K in proposed MSHA penalties and $2K outstanding across 3 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
8
Years on record
2009–2025
Latest incident
Sep 2025
Compliance record
MSHA citations since 2008
65
citations
17
significant & substantial
$15,411
proposed penalties
$12,973
paid to date
84% of proposed penalties paid to date, a $2,438 gap.
Source: MSHA violations data, updated weekly.
See Kilgore Contracting's full MSHA compliance history →
Inspection activity
MSHA inspections since 2008
33
inspections on record
502
inspection hours
n/a
citations per 100 inspection hours
ⓘ This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 502 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Stockton Pit has $15K in proposed MSHA penalties and $2K outstanding across 3 contested dockets.

Penalty disposition
ⓘ Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$15K
proposed penalties
$15K
current assessed
$13K
paid to date
$2K
outstanding
62 assessments are final orders; 3 contested dockets.
Of $3K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2026-06-24.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘ Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
26.2%
significant & substantial
3.1%
high negligence or reckless
26.2%
reasonably likely or greater
84.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 0.0% low, 96.9% moderate, 3.1% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
3 citations taken to the federal commission · 5% of citations on record
  • Settled 3 · 100%
100%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 2 decided S&S contests · industry: 79%
12%
Penalty reduction in decided contests
$3K proposed, $2K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2013-08-21.
Contested penalties
ⓘ A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2013-1072M Settlement Lesnick 2014 $2K → $2K
WEST 2012-779M Settlement Lesnick 2013 $460 → $154
WEST 2013-1073M Settlement Lesnick 2014 $100 → $100
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
ⓘ A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
ⓘ Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2026-06-29
38%
of limit-tested samples over the exposure limit
21
samples
13
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz145 over
  • Respirable dust, <.1mg7
Show the individual readings (21)
Date Contaminant Concentration Limit Conc / limit Occupation
2021-06-16 Quartz, respirable, >1% Qtz 0.31 0.25 1.24 Laborer, Bullgang
2009-04-22 Quartz, respirable, >1% Qtz 0.59 0.45 1.31 Front-end Loader Operator
2009-04-22 Quartz, respirable, >1% Qtz 0.56 0.31 1.81 Front-end Loader Operator
2009-04-22 Quartz, respirable, >1% Qtz 0.55 0.33 1.67 Crusher Oper/Worker
2009-04-22 Quartz, respirable, >1% Qtz 1.78 0.49 3.63 Supervisor, Co. Official
2026-06-29 Respirable dust, <.1mg 0 Laborer, Bullgang
2023-09-27 Quartz, respirable, >1% Qtz 0.13 Front-end Loader Operator
2023-09-27 Respirable dust, <.1mg 0 Laborer, Bullgang
2021-08-10 Quartz, respirable, >1% Qtz 0.24 0.36 0.67 Laborer, Bullgang
2021-06-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-06-16 Quartz, respirable, >1% Qtz 0.29 0.32 0.91 Crusher Oper/Worker
2018-06-14 Quartz, respirable, >1% Qtz 0.21 0.49 0.43 Crusher Oper/Worker
2018-06-14 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-01-11 Quartz, respirable, >1% Qtz 0.14 0.28 0.50 Crusher Oper/Worker
2012-01-11 Quartz, respirable, >1% Qtz 0.24 0.66 0.36 Laborer, Bullgang
2012-01-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-01-11 Quartz, respirable, >1% Qtz 0.14 0.37 0.38 Laborer, Bullgang
2009-07-07 Quartz, respirable, >1% Qtz 0.3 0.67 0.45 Laborer, Bullgang
2009-06-23 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-06-23 Quartz, respirable, >1% Qtz 0.21 0.7 0.30 Crusher Oper/Worker
2009-06-23 Respirable dust, <.1mg 0 Front-end Loader Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

Stockton Pit recorded 6.39 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
ⓘ This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
6.39
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Utah, metal and nonmetal mining averaged 1.89 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2025 * 6.39 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 6.58 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. BJ Rees's Enterprise 2007 to 2008
  2. Peak Construction Material 2008 to 2010
  3. Kilgore Contracting 2011 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 17
2025 11
2024 12
2023 10
2022 11
2021 9
2020 9
2019 7
2018 4
2015 0
2014 0
2013 5
2012 8
2011 10
2010 6
2009 7
2008 6
2007 7
Source: MSHA quarterly employment and production, updated weekly.

Stockton Pit sits in Tooele County, Utah, where the Census mining category is 1.8% of county employment.

Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Tooele County, Utah · Population 76,648
1.8%
Mining share of county employment
$101,846
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
Quarterly safety rates
ⓘ Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2026 Q2 10,946 3 0 274.1
2026 Q1 9,292 4 1 430.5
2025 Q4 7,504 0 0 0.0
2025 Q3 9,470 0 0 0.0
2025 Q2 8,056 3 0 372.4
2025 Q1 6,258 0 0 0.0
2024 Q4 8,698 1 0 115.0
2024 Q3 7,920 0 0 0.0
Show 56 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 7,947 1 0 125.8
2024 Q1 5,174 0 0 0.0
2023 Q4 6,948 1 0 143.9
2023 Q3 7,405 0 0 0.0
2023 Q2 5,815 0 0 0.0
2023 Q1 3,528 0 0 0.0
2022 Q4 7,462 1 0 134.0
2022 Q3 7,880 0 0 0.0
2022 Q2 8,028 8 1 996.5
2022 Q1 7,032 0 0 0.0
2021 Q4 6,707 1 0 149.1
2021 Q3 6,499 1 1 153.9
2021 Q2 5,654 0 0 0.0
2021 Q1 4,783 0 0 0.0
2020 Q4 5,187 1 1 192.8
2020 Q3 5,433 0 0 0.0
2020 Q2 4,993 2 0 400.6
2020 Q1 5,039 0 0 0.0
2019 Q4 5,913 0 0 0.0
2019 Q3 4,717 0 0 0.0
2019 Q2 3,931 0 0 0.0
2019 Q1 1,468 0 0 0.0
2018 Q4 0 0 0
2018 Q3 817 0 0 0.0
2018 Q2 2,970 0 0 0.0
2018 Q1 1,207 0 0 0.0
2015 Q2 0 0 0
2015 Q1 0 0 0
2014 Q4 0 0 0
2014 Q3 0 0 0
2013 Q4 320 0 0 0.0
2013 Q3 738 0 0 0.0
2013 Q2 3,751 6 1 1599.6
2013 Q1 2,308 0 0 0.0
2012 Q4 4,008 0 0 0.0
2012 Q3 4,518 4 1 885.3
2012 Q2 4,256 0 0 0.0
2012 Q1 2,696 4 1 1483.7
2011 Q4 4,612 0 0 0.0
2011 Q3 4,442 0 0 0.0
2011 Q2 3,997 0 0 0.0
2011 Q1 1,727 0 0 0.0
2010 Q4 2,525 0 0 0.0
2010 Q3 3,719 0 0 0.0
2010 Q2 4,359 0 0 0.0
2010 Q1 2,219 3 2 1352.0
2009 Q4 3,059 0 0 0.0
2009 Q3 4,294 0 0 0.0
2009 Q2 3,746 6 4 1601.7
2009 Q1 1,928 0 0 0.0
2008 Q4 3,493 4 0 1145.1
2008 Q3 2,076 0 0 0.0
2008 Q2 4,439 0 0 0.0
2008 Q1 3,938 4 1 1015.7
2007 Q4 4,686 0 0 0.0
2007 Q3 3,798 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

8 on file

2025 · 1 incident

September 30, 2025 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Kilgore Contracting · Over-exertion (Not Elsewhere Classified)

The employee was walking around EE's service truck walking on uneven surface throwing away trash, flashing, and old bearing housing that were in the back of the service truck, when the employee felt a pop in EE's left knee.

2022 · 1 incident

August 4, 2022 UT · Metal/Non-Metal outside foreman, leadman MACHINERY
Kilgore Contracting · Caught in, under or between a moving and a stationary object

Employee removed a bolt from a wash plant pinching EE's finger causing a laceration to EE's right little finger requiring stitches.

2012 · 1 incident

September 4, 2012 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Kilgore Contracting · Caught in, under or between a moving and a stationary object

Employee was using a pry bar to lift steel plate to remove a rock that was stuck behind the plate. His hand slid off bar and pinched his right hand between the plate and the rock that he was removing.

2011 · 1 incident

December 3, 2011 UT · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Kilgore Contracting · Struck against stationary object

Employee was climbing the access ladder to a 980H loader and struck knee on bottom of the next step up causing a contusion

2010 · 3 incidents

June 28, 2010 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Peak Construction Material · Struck by... (Not Elsewhere Classified)

EE was in the process of changing mantle head on crusher, large wrench slipped hitting EE on right knee causing a laceration

June 28, 2010 UT · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Peak Construction Material · Struck against stationary object

while decending from repair job on rock chute Employee struck shin on piece of metal

March 1, 2010 UT · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Peak Construction Material · Struck by... (Not Elsewhere Classified)

While using a chisel to remove the teeth on a loader bucket, the chisel had broke when struck by the hammer causing injury to miners left hand

2009 · 1 incident