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Portable Plant 1: 18 MSHA citations Metal/Non-Metal

Cheyenne, Laramie County, WY  ·  Temporarily Idled
MSHA Mine ID: 0504359

Portable Plant 1 has $4K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
9
Years on record
1989–2004
Latest incident
Jan 2004
Compliance record
MSHA citations since 2002
18
citations
4
significant & substantial
$3,987
proposed penalties
$3,487
paid to date
87% of proposed penalties paid to date, a $500 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
26
inspections on record
306
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: 306 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Portable Plant 1 has $4K in proposed MSHA penalties and $0 outstanding across 1 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.
$4K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
17 assessments are final orders; 1 contested dockets.
Of $2K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2020-05-20.
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.
23.5%
significant & substantial
23.5%
high negligence or reckless
23.5%
reasonably likely or greater
41.2%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 5.9% low, 70.6% moderate, 23.5% 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.
2 citations taken to the federal commission · 11% of citations on record
  • Settled 1 · 50%
  • Stood as issued 1 · 50%
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%
40%
Penalty reduction in decided contests
$2K 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 2008-09-23.
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 2008-697M Settlement Manning 2009 $2K → $2K
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: 2019-12-10, 6 years ago
20%
of limit-tested samples over the exposure limit
10
samples
5
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz61 over
  • Respirable dust, <.1mg4
Show the individual readings (10)
Date Contaminant Concentration Limit Conc / limit Occupation
2019-09-26 Quartz, respirable, >1% Qtz 1.75 1.17 1.50 Laborer, Bullgang
2019-12-10 Quartz, respirable, >1% Qtz 0.15 Laborer, Bullgang
2019-12-10 Respirable dust, <.1mg 0 Laborer, Bullgang
2019-09-26 Quartz, respirable, >1% Qtz 0.62 1.12 0.55 Front-end Loader Operator
2019-09-26 Quartz, respirable, >1% Qtz 0.41 0.91 0.45 Bobcat Operator
2016-03-09 Respirable dust, <.1mg 0 Laborer, Bullgang
2016-03-09 Quartz, respirable, >1% Qtz 0.29 1.28 0.23 Front-end Loader Operator
2002-09-10 Quartz, respirable, >1% Qtz 0.15 0.37 0.41 Cleanup Man
2002-09-10 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-09-10 Respirable dust, <.1mg 0 Belt Cleaner
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. Western-Mobile Northern Inc 1988 to 1998
  2. Western Mobile Northern Inc 1998 to 2002
  3. Lafarge West Incorporated 2002 to 2015
  4. Martin Marietta Materials Inc. 2015 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 0
2025 0
2024 1
2023 1
2022 0
2021 2
2020 4
2019 6
2018 4
2017 2
2016 2
2015 5
2009 0
2008 4
2007 4
2006 4
2005 3
2004 5
2003 3
2002 4
2001 5
2000 5
Source: MSHA quarterly employment and production, updated weekly.

Portable Plant 1 sits in Laramie County, Wyoming, where the Census mining category is 1.2% 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.
Laramie County, Wyoming · Population 100,661
1.2%
Mining share of county employment
$77,884
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 0 0 0
2026 Q1 0 0 0
2025 Q4 0 0 0
2025 Q3 0 0 0
2025 Q2 0 0 0
2025 Q1 0 0 0
2024 Q4 396 0 0 0.0
2024 Q3 1,200 0 0 0.0
Show 74 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 0 0 0
2024 Q1 0 0 0
2023 Q4 1,243 0 0 0.0
2023 Q3 864 0 0 0.0
2023 Q2 0 0 0
2023 Q1 0 0 0
2022 Q4 0 0 0
2022 Q3 0 0 0
2022 Q2 0 0 0
2022 Q1 0 0 0
2021 Q4 205 0 0 0.0
2021 Q3 0 0 0
2021 Q2 2,065 0 0 0.0
2021 Q1 82 0 0 0.0
2020 Q4 1,898 0 0 0.0
2020 Q3 2,703 0 0 0.0
2020 Q2 3,264 2 0 612.7
2020 Q1 2,277 0 0 0.0
2019 Q4 3,378 3 1 888.1
2019 Q3 4,776 0 0 0.0
2019 Q2 4,812 0 0 0.0
2019 Q1 2,887 0 0 0.0
2018 Q4 2,178 1 0 459.1
2018 Q3 2,586 0 0 0.0
2018 Q2 3,691 0 0 0.0
2018 Q1 346 0 0 0.0
2017 Q4 278 0 0 0.0
2017 Q3 881 0 0 0.0
2017 Q2 873 0 0 0.0
2017 Q1 0 0 0
2016 Q4 0 0 0
2016 Q3 0 0 0
2016 Q2 55 0 0 0.0
2016 Q1 1,041 0 0 0.0
2015 Q4 2,160 0 0 0.0
2015 Q3 3,654 0 0 0.0
2015 Q2 1,708 0 0 0.0
2009 Q1 0 0 0
2008 Q4 759 0 0 0.0
2008 Q3 3,342 0 0 0.0
2008 Q2 2,753 0 0 0.0
2008 Q1 698 0 0 0.0
2007 Q4 1,568 7 3 4464.3
2007 Q3 2,571 0 0 0.0
2007 Q2 2,540 0 0 0.0
2007 Q1 1,416 0 0 0.0
2006 Q4 2,142 0 0 0.0
2006 Q3 2,282 0 0 0.0
2006 Q2 2,123 0 0 0.0
2006 Q1 1,480 0 0 0.0
2005 Q4 1,392 0 0 0.0
2005 Q3 1,177 0 0 0.0
2005 Q2 2,373 0 0 0.0
2005 Q1 1,453 0 0 0.0
2004 Q4 325 0 0 0.0
2004 Q3 1,924 1 0 519.8
2004 Q2 2,187 0 0 0.0
2004 Q1 2,389 3 0 1255.8
2003 Q4 0 0 0
2003 Q3 0 0 0
2003 Q2 2,862 0 0 0.0
2003 Q1 1,124 0 0 0.0
2002 Q4 1,246 0 0 0.0
2002 Q3 4,532 1 0 220.7
2002 Q2 2,790 0 0 0.0
2002 Q1 379 0 0 0.0
2001 Q4 1,597 0 0 0.0
2001 Q3 3,314 0 0 0.0
2001 Q2 4,003 0 0 0.0
2001 Q1 2,613 0 0 0.0
2000 Q4 3,133 0 0 0.0
2000 Q3 3,702 0 0 0.0
2000 Q2 3,045 0 0 0.0
2000 Q1 592 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

9 on file

2004 · 1 incident

January 14, 2004 WY · Metal/Non-Metal mine manager, mine foreman, mine owner MACHINERY
Lafarge West Incorporated · Contact with hot objects or substances

EE WAS WELDING AND A SPARK ENTERED HIS CLOTHING CAUSING A BURN TO HIS ARM.

1999 · 1 incident

1998 · 2 incidents

January 21, 1998 CO · Metal/Non-Metal greaser, grease man, oiler, lube man, dragline oiler POWERED HAULAGE
Western-Mobile Northern Inc · Caught in, under or between a moving and a stationary object

PULLING DIRT CLODS OFF BELT, HAND CAUGHT.

1997 · 1 incident

February 20, 1997 CO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Western-Mobile Northern Inc · Struck against a moving object

STOCKPILING, REAR TIRE ON BERM, TURNED LOADER ON IT'S SIDE.

1995 · 1 incident

1991 · 1 incident

October 31, 1991 CO · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Western-Mobile Northern Inc · Fall onto or against objects

EMPLOYEE SLIPPED ON LADDER GOING ONTO SCREENS. HE HIT HIS LEFT KNEE ON TOP RAIL.

1990 · 1 incident

1989 · 1 incident

June 21, 1989 CO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Western-Mobile Northern Inc · Contact with hot objects or substances

WHILE CUTTING AND WELDING EQUIP HOT METAL FELL INTO BOOT WHILE WELDING