Mining Incidents

Erda Pit: 37 MSHA citations Metal/Non-Metal

Kilgore Contracting · Surface
Controlled by Summit Materials LLC
Erda, Salt Lake County, UT  ·  Active
MSHA Mine ID: 4201479

Erda Pit has $5K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2000
37
citations
8
significant & substantial
$4,734
proposed penalties
$4,734
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
22
inspections on record
242
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: 242 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Erda Pit has $5K in proposed MSHA penalties and $0 outstanding across 0 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.
$5K
proposed penalties
$5K
current assessed
$5K
paid to date
$0
outstanding
37 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2022-02-22.
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.
21.6%
significant & substantial
2.7%
high negligence or reckless
21.6%
reasonably likely or greater
67.6%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.4% low, 91.9% moderate, 2.7% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, 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: 2020-03-18, 6 years ago
0%
of limit-tested samples over the exposure limit
8
samples
3
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg5
  • Quartz, respirable, >1% Qtz3
Show the individual readings (8)
Date Contaminant Concentration Limit Conc / limit Occupation
2020-03-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-03-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2010-03-25 Quartz, respirable, >1% Qtz 0.12 1.03 0.12 Front-end Loader Operator
2010-03-25 Quartz, respirable, >1% Qtz 0.18 1.89 0.10 Crusher Oper/Worker
2010-03-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2000-12-07 Quartz, respirable, >1% Qtz 0.27 0.33 0.82 Crusher Oper/Worker
2000-12-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2000-12-07 Respirable dust, <.1mg 0 Truck Driver

Area samples (mill and shop air)

Last sampled: 2017-03-30, 9 years ago
4
samples
Show the individual readings (4)
Date Contaminant Concentration Limit Conc / limit Area sampled
2017-03-30 Respirable dust, <.1mg 0 SF ORE TRANSFER
2017-03-30 Respirable dust, <.1mg 0 SF ORE TRANSFER
2016-08-26 Respirable dust, <.1mg 0 Cat 980H
2016-08-26 Respirable dust, <.1mg 0 Crusher Area
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.
Ownership history
  1. Staker Paving & Construction Company Inc 1978 to 1992
  2. Harper Sand & Gravel 1992 to 2010
  3. Kilgore Contracting 2010 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 3
2024 0
2023 1
2022 5
2021 5
2020 5
2019 4
2018 3
2017 2
2016 2
2010 3
2009 3
2005 2
2004 2
2002 2
2001 4
2000 9
Source: MSHA quarterly employment and production, updated weekly.

Erda Pit sits in Salt Lake County, Utah, where the Census mining category is 0.4% 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.
Salt Lake County, Utah · Population 1,184,689
0.4%
Mining share of county employment
$94,658
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 1,458 0 0 0.0
2026 Q1 981 0 0 0.0
2025 Q4 1,025 0 0 0.0
2025 Q3 1,441 0 0 0.0
2025 Q2 1,222 0 0 0.0
2025 Q1 279 0 0 0.0
2024 Q4 0 0 0
2024 Q3 0 0 0
Show 56 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 0 0 0
2024 Q1 0 0 0
2023 Q4 0 0 0
2023 Q3 0 0 0
2023 Q2 186 0 0 0.0
2023 Q1 266 0 0 0.0
2022 Q4 418 0 0 0.0
2022 Q3 2,963 0 0 0.0
2022 Q2 1,994 0 0 0.0
2022 Q1 2,880 4 1 1388.9
2021 Q4 1,155 0 0 0.0
2021 Q3 3,466 0 0 0.0
2021 Q2 3,237 0 0 0.0
2021 Q1 2,511 1 0 398.2
2020 Q4 3,638 0 0 0.0
2020 Q3 3,136 0 0 0.0
2020 Q2 866 0 0 0.0
2020 Q1 939 0 0 0.0
2019 Q4 518 0 0 0.0
2019 Q3 1,955 0 0 0.0
2019 Q2 184 0 0 0.0
2018 Q4 2,725 0 0 0.0
2018 Q3 1,190 0 0 0.0
2018 Q2 326 0 0 0.0
2018 Q1 745 3 1 4026.8
2017 Q4 1,166 0 0 0.0
2017 Q3 705 0 0 0.0
2017 Q2 501 0 0 0.0
2017 Q1 404 0 0 0.0
2016 Q4 532 0 0 0.0
2016 Q3 475 2 1 4210.5
2016 Q2 684 0 0 0.0
2016 Q1 477 0 0 0.0
2010 Q4 0 0 0
2010 Q3 394 0 0 0.0
2010 Q2 1,979 0 0 0.0
2010 Q1 381 4 2 10498.7
2009 Q4 1,007 0 0 0.0
2009 Q3 1,549 0 0 0.0
2009 Q2 1,940 0 0 0.0
2009 Q1 1,145 4 0 3493.4
2005 Q2 482 0 0 0.0
2005 Q1 311 0 0 0.0
2004 Q4 603 0 0 0.0
2004 Q3 688 8 1 11627.9
2002 Q3 76 0 0 0.0
2002 Q2 0 1 0
2002 Q1 6 0 0 0.0
2001 Q4 994 0 0 0.0
2001 Q3 1,401 0 0 0.0
2001 Q2 1,417 0 0 0.0
2001 Q1 904 0 0 0.0
2000 Q4 2,521 6 1 2380.0
2000 Q3 4,582 0 0 0.0
2000 Q2 3,934 4 1 1016.8
2000 Q1 4,027 0 0 0.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.