Rock Springs, WY, Sweetwater County,
WY
·
Abandoned
MSHA Mine ID: 4801645
ADDCAR System 18 HWM Serial No 23018 has $14K in proposed MSHA penalties and $0 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
2005–2025
Latest incident
May 2025
Compliance record
MSHA citations since 2004
62
citations
4
significant & substantial
$14,108
proposed penalties
$11,218
paid to date
80% of proposed penalties paid to date, a $2,890 gap.
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.
62 citations across 1,512 inspection hours.
Source: MSHA inspections data, updated weekly.
ADDCAR System 18 HWM Serial No 23018 has $14K in proposed MSHA penalties and $0 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.
$14K
proposed penalties
$11K
current assessed
$11K
paid to date
$0
outstanding
62 assessments are final orders; 3 contested dockets.
Of $6K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2025-11-06.
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.
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.
5citations taken to the federal commission · 8% of citations on record
Settled
4 · 80%
Vacated or withdrawn
1 · 20%
0%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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%
81%
Penalty reduction in decided contests
$6K proposed, $1K 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 2009-08-26.
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.
MSHA sampling at ADDCAR System 18 HWM Serial No 23018 shows 94% of 125 respirable coal dust samples met the 1.5 mg/m3 standard.
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.
Respirable coal dust
ⓘRespirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
Last sampled: 2025-11-11
94%
within 1.5 mg/m3
125
samples
3.25
dust max (mg/m3)
0
over MSHA ECV
ⓘThe excessive concentration value (ECV) is MSHA's own per-sample enforcement threshold, which builds in measurement uncertainty; a sample over its ECV can trigger a citation. The count covers only samples MSHA assigned an ECV.
90 samples taken by MSHA inspectors, 35 by the operator.
Noise
ⓘThe share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.
Health sampling trend
ⓘ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.
Respirable coal dust by year
ⓘRespirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
ADDCAR System 18 HWM Serial No 23018 recorded 5.01 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.
5.01
total case rate
0.00
days-away rate
0.000
fatality rate
Above average. The US coal mining average was 3.19 and the all-US-mining average was 1.97 cases per 100 workers.
In Wyoming, coal mining averaged 0.91 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 *
5.01
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2015 *
3.60
0.00
0.000
2014 *
5.76
5.76
0.000
2013 *
0.00
0.00
0.000
2011 *
0.00
0.00
0.000
2010 *
11.64
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
ⓘCoal production is reported quarterly and lags the current period; the most recent quarters may be incomplete.
Year
Employees
Coal produced (tons)
2025
17
605,071
2024
3
2023
3
2022
7
78,477
2021
4
2020
10
101,713
2019
10
125,930
2018
1
2017
1
2016
4
2015
22
1,058,481
2014
27
1,175,264
2013
16
350,060
2012
0
2011
18
255,619
2010
18
356,683
2009
27
780,530
2008
27
1,338,179
2007
36
1,616,635
2006
28
1,725,979
2005
33
2,030,594
2004
22
990,045
Source: MSHA quarterly employment and production, updated weekly.
ADDCAR System 18 HWM Serial No 23018 sits in Sweetwater County, Wyoming, where the Census mining category is 13.3% 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.
Sweetwater County, Wyoming · Population 41,786
13.3%
Mining share of county employment
$76,464
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
2025 Q4
6,567
1
0
152.3
2025 Q3
10,497
0
0
0.0
2025 Q2
10,388
2
0
192.5
2025 Q1
12,474
0
0
0.0
2024 Q4
5,444
3
0
551.1
2024 Q3
0
0
0
2024 Q2
776
0
0
0.0
2024 Q1
0
0
0
Show 80 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
1,371
0
0
0.0
2023 Q3
72
0
0
0.0
2023 Q2
1,093
0
0
0.0
2023 Q1
506
0
0
0.0
2022 Q4
6,619
0
0
0.0
2022 Q3
6,121
1
0
163.4
2022 Q2
1,737
0
0
0.0
2022 Q1
90
0
0
0.0
2021 Q4
1,074
0
0
0.0
2021 Q3
1,670
0
0
0.0
2021 Q2
1,596
0
0
0.0
2021 Q1
3,872
0
0
0.0
2020 Q4
3,175
0
0
0.0
2020 Q3
7,712
0
0
0.0
2020 Q2
6,125
0
0
0.0
2020 Q1
5,610
0
0
0.0
2019 Q4
13,241
0
0
0.0
2019 Q3
12,798
0
0
0.0
2019 Q2
3,114
0
0
0.0
2019 Q1
0
0
0
2018 Q4
0
0
0
2018 Q3
0
0
0
2018 Q2
0
0
0
2018 Q1
1,849
0
0
0.0
2017 Q4
786
0
0
0.0
2017 Q3
0
0
0
2017 Q2
240
0
0
0.0
2017 Q1
262
0
0
0.0
2016 Q4
948
0
0
0.0
2016 Q3
4,242
0
0
0.0
2016 Q2
136
0
0
0.0
2016 Q1
1,419
0
0
0.0
2015 Q4
2,904
0
0
0.0
2015 Q3
16,719
0
0
0.0
2015 Q2
17,760
0
0
0.0
2015 Q1
18,147
0
0
0.0
2014 Q4
15,270
1
0
65.5
2014 Q3
18,034
2
0
110.9
2014 Q2
18,279
0
0
0.0
2014 Q1
17,829
1
0
56.1
2013 Q4
12,565
0
0
0.0
2013 Q3
9,281
0
0
0.0
2013 Q2
11,431
1
0
87.5
2013 Q1
2,410
0
0
0.0
2012 Q4
0
0
0
2012 Q3
0
0
0
2012 Q2
0
0
0
2012 Q1
0
0
0
2011 Q4
0
0
0
2011 Q3
4,065
0
0
0.0
2011 Q2
20,800
2
0
96.2
2011 Q1
11,425
0
0
0.0
2010 Q4
9,656
0
0
0.0
2010 Q3
8,147
0
0
0.0
2010 Q2
7,845
0
0
0.0
2010 Q1
8,703
0
0
0.0
2009 Q4
14,119
0
0
0.0
2009 Q3
20,355
0
0
0.0
2009 Q2
18,665
7
1
375.0
2009 Q1
13,981
4
0
286.1
2008 Q4
13,665
0
0
0.0
2008 Q3
16,563
0
0
0.0
2008 Q2
17,584
8
2
455.0
2008 Q1
16,623
0
0
0.0
2007 Q4
16,706
0
0
0.0
2007 Q3
21,911
9
0
410.8
2007 Q2
24,701
0
0
0.0
2007 Q1
21,033
0
0
0.0
2006 Q4
18,742
0
0
0.0
2006 Q3
18,917
0
0
0.0
2006 Q2
17,592
0
0
0.0
2006 Q1
18,747
7
0
373.4
2005 Q4
21,318
0
0
0.0
2005 Q3
19,035
0
0
0.0
2005 Q2
19,517
1
0
51.2
2005 Q1
19,476
5
1
256.7
2004 Q4
18,889
0
0
0.0
2004 Q3
16,164
3
0
185.6
2004 Q2
14,093
0
0
0.0
2004 Q1
5,613
4
0
712.6
No fatalities recorded at this mine.
Reportable incidents
8 on file
2025 · 1 incident
May 8, 2025WY · Coallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
While attempting to free an air hose coupling from the spooling eye of the reel with a pair of pliers, the hose unexpectedly continued through the spooling device; pulling the employee's hand along with the hose before the pliers could be released. A finger of the left hand likely hit the spooling device or the air hose and caused the tip of the finger to be over-extended.
2014 · 2 incidents
December 14, 2014WY · Coalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
After the employee exited a pickup truck, his footing was lost on snowy ground causing him to fall; striking his head on the ground.
January 19, 2014WY · Coallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
ADDCAR Systems, LLC · Caught in, under or between (Not Elsewhere Classified)
Employee was removing a rock from a conveyor car when the rock slipped out of his right and two fingers on his left hand were pinched between the rock and the frame of the conveyor car.
2010 · 2 incidents
November 6, 2010WY · Coallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Employee was attempting to connect two sequence plugs together when the plugs silpped apart. When this occurred one of the plugs struck him on the right front tooth,chipping that tooth.
EE was helping pull the trailing cable of the continuous miner off of the cable reel in an effort to locate the reason that the circuit breaker was knocking. While doing this his foot became entangled in that trailing cable causing him to fall; and his head hit the ground. As the result the side shields on his safety glasses caused a laceration that required 7 sutures to close.
2008 · 1 incident
February 10, 2008WY · Coalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
EE was making a belt splice on a conveyor car and needed a hammer while doing this task. As he attempted to get off of the car he slipped on some snow that was present there and in an attempt to catch his balance, his left hand struck the car's frame, resulting into a hairline fracture to a bone in that hand.
2005 · 1 incident
July 21, 2005WY · Coalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techEXPLODING VESSELS UNDER PRESSURE
ADDCAR Systems, LLC · Absorption of radiations, caustics, toxic and noxious substances
Employees were looking for an oil leak on in the miner pan jack area. In the process of troubleshooting the leak a hydraulic hose blew, spraying employee in the face. He was approximately 10' away and was wearing his safety glasses. He was taken to the hospital to have his eyes washed out and checked. Employee was given prescription eye drops.
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