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: 290 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 $7K 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$0
outstanding
46 assessments are final orders; 1 contested dockets.
Of $1K in penalties contested before the Commission, $688 was upheld in final decisions.
As of the most recent assessment on 2024-12-04.
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.
1citations taken to the federal commission · 2% of citations on record
Settled
1 · 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
33%
Penalty reduction in decided contests
$1K proposed, $688 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2008-12-23.
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.
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: 2024-12-04
0%
of limit-tested samples over the exposure limit
9
samples
7
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz7
Respirable dust, <.1mg2
Show the individual readings (9)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-12-04
Quartz, respirable, >1% Qtz
0.18
0.23
0.78
Cleanup Man
2024-12-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2007-04-04
Quartz, respirable, >1% Qtz
0.45
1.58
0.28
Dry Screen Plant Operator
2007-04-04
Quartz, respirable, >1% Qtz
0.73
2.99
0.24
Crusher Oper/Worker
2004-07-21
Respirable dust, <.1mg
0
Crusher Oper/Worker
2002-11-13
Quartz, respirable, >1% Qtz
1.11
2.65
0.42
Crusher Oper/Worker
2002-11-13
Quartz, respirable, >1% Qtz
0.85
3.17
0.27
Crusher Oper/Worker
2001-04-18
Quartz, respirable, >1% Qtz
0.51
2.28
0.22
Crusher Oper/Worker
2001-04-18
Quartz, respirable, >1% Qtz
1.54
2.72
0.57
Crusher Oper/Worker
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.
Portable Plant 1 recorded 0.00 reportable injury cases per 100 full-time workers in 2008.
Injury rate, 2008
ⓘ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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 3.15 and the all-US-mining average was 3.61 cases per 100 workers.
In Minnesota, metal and nonmetal mining averaged 2.61 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
2008 *
0.00
0.00
0.000
2007 *
8.51
0.00
0.000
2006 *
0.00
0.00
0.000
2005 *
7.98
0.00
0.000
2004 *
9.17
0.00
0.000
2003 *
0.00
0.00
0.000
2002 *
0.00
0.00
0.000
2001 *
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
0
2025
1
2024
2
2023
2
2018
3
2017
0
2016
0
2015
2
2014
7
2013
5
2012
1
2011
0
2010
1
2009
9
2008
14
2007
12
2006
14
2005
14
2004
17
2003
18
2002
16
2001
16
2000
18
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant 1 sits in Scott County, Minnesota, where the Census mining category is 0.3% 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.
Scott County, Minnesota · Population 152,957
0.3%
Mining share of county employment
$120,247
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 Q2
51
0
0
0.0
2025 Q1
544
0
0
0.0
2024 Q4
1,037
1
0
964.3
2024 Q3
235
0
0
0.0
2024 Q2
1,095
0
0
0.0
Show 79 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q1
276
0
0
0.0
2023 Q4
85
1
0
11764.7
2023 Q3
1,100
0
0
0.0
2018 Q4
0
0
0
2018 Q3
0
0
0
2018 Q2
1,374
1
0
727.8
2018 Q1
1,386
0
0
0.0
2017 Q4
0
0
0
2017 Q3
0
0
0
2017 Q2
0
0
0
2017 Q1
0
0
0
2016 Q4
0
0
0
2016 Q3
0
0
0
2016 Q2
0
0
0
2016 Q1
0
0
0
2015 Q4
0
0
0
2015 Q3
274
0
0
0.0
2015 Q2
0
0
0
2015 Q1
0
0
0
2014 Q4
5,169
0
0
0.0
2014 Q3
4,269
0
0
0.0
2014 Q2
1,634
0
0
0.0
2014 Q1
2,020
2
2
990.1
2013 Q4
5,160
0
0
0.0
2013 Q3
3,045
1
0
328.4
2013 Q2
0
0
0
2013 Q1
0
0
0
2012 Q4
0
0
0
2012 Q3
1,671
0
0
0.0
2012 Q2
0
0
0
2012 Q1
0
0
0
2011 Q4
0
0
0
2011 Q3
0
0
0
2011 Q2
0
0
0
2011 Q1
0
0
0
2010 Q4
0
0
0
2010 Q3
0
0
0
2010 Q2
119
0
0
0.0
2010 Q1
0
0
0
2009 Q4
3,016
0
0
0.0
2009 Q3
5,064
0
0
0.0
2009 Q2
4,582
0
0
0.0
2009 Q1
1,802
0
0
0.0
2008 Q4
5,511
6
2
1088.7
2008 Q3
7,348
0
0
0.0
2008 Q2
7,460
0
0
0.0
2008 Q1
2,142
0
0
0.0
2007 Q4
7,320
8
0
1092.9
2007 Q3
6,936
0
0
0.0
2007 Q2
6,721
2
0
297.6
2007 Q1
2,520
0
0
0.0
2006 Q4
7,752
0
0
0.0
2006 Q3
7,317
0
0
0.0
2006 Q2
8,173
0
0
0.0
2006 Q1
2,660
0
0
0.0
2005 Q4
7,155
4
0
559.0
2005 Q3
7,470
0
0
0.0
2005 Q2
8,057
0
0
0.0
2005 Q1
2,369
0
0
0.0
2004 Q4
2,082
0
0
0.0
2004 Q3
7,848
3
0
382.3
2004 Q2
9,169
0
0
0.0
2004 Q1
2,716
0
0
0.0
2003 Q4
8,311
0
0
0.0
2003 Q3
9,575
0
0
0.0
2003 Q2
7,971
0
0
0.0
2003 Q1
3,644
0
0
0.0
2002 Q4
7,269
5
0
687.9
2002 Q3
8,134
0
0
0.0
2002 Q2
8,020
0
0
0.0
2002 Q1
4,118
5
3
1214.2
2001 Q4
7,705
0
0
0.0
2001 Q3
8,833
0
0
0.0
2001 Q2
8,035
4
1
497.8
2001 Q1
3,336
0
0
0.0
2000 Q4
6,902
0
0
0.0
2000 Q3
9,640
0
0
0.0
2000 Q2
7,960
0
0
0.0
2000 Q1
5,201
3
1
576.8
No fatalities recorded at this mine.
Reportable incidents
11 on file
2024 · 2 incidents
December 30, 2024MN · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSTEPPING OR KNEELING ON OBJECT
Employee was crawling under rock shoot to gain access to rear panel, while climbing out stepped on rock, twisted and fell they twisted their left ankle and needs a boot and restrictions after seeing the doc.
A Renaissance Fair attendee bypassed a fence and berm to climb on the quarry wall and fell 30-35 feet to the ground below. Authorities said alcohol was suspected and they are still investigating. The injured person is not a Bryan Rock employee and no employees or equipment were present.
Employee attended our annual safety class in Feb. 07 and took his annual hearing test. We just received the test results and notified the employee of his change. Employee stated there was background noises during his test that may have affected his test results. Employee will be offered a retest if his so desires.
EE AND A COWORKER WERE STANDING ON A TEMPORARY SCAFFOLD ABOVE A JAW CONE CRUSHER. THE TEMPORARY WELD BROKE CAUSING BOTH TO FALL INTO CONE. HE BROKE A BONE IN HIS RIGHT FOOT.
2004 · 1 incident
August 28, 2004MN · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EE WAS MOVING PIECES OF STEEL AND CUT HIS RIGHT WRIST. HE PUT A BAND AID ON AND KEPT WORKING. LATER IN THE DAY HE WENT TO A DOCTOR WHO PUT IN 7 STITCHES. NO LOST TIME FROM WORK. HEALING FINE.
1989 · 1 incident
September 20, 1989MN · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPL WAS UNDER CRUSHER WORKING NEAR ANOTHER EMPL WHO WAS WELDING. HE DID N OT DIRECTLY LOOK INTO FLASH BUT APPARENTLY RECEIVED WELDER FLASH FROM SIDE TO CAUSE MINOR FLASH TO EYES.
1987 · 1 incident
August 11, 1987MN · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
I.ANME WAS STAN8ING ON A METAL PLATE ON TOP OF IMPACT CRUSHER WHEN THE IMPACT OF A ROCK HITTING THE PLATE CAUSED A SUDDEN JAR TO HIS HEEL CAUSING SORENESS & A HAIRLINE FRACTURE.
1983 · 1 incident
May 4, 1983MN · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS