Mining Incidents

Portable Rock Plant #2: 10 MSHA citations Metal/Non-Metal

Controlled by MDU Resources Group Inc
Leroy, Winneshiek County, IA  ·  Abandoned
MSHA Mine ID: 2101392

Portable Rock Plant #2 has $704 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
1
Years on record
2001
Latest incident
Oct 2001
Compliance record
MSHA citations since 2001
10
citations
3
significant & substantial
$704
proposed penalties
$704
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
7
inspections on record
59
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: 59 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 Rock Plant #2 has $704 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.
$704
proposed penalties
$704
current assessed
$704
paid to date
$0
outstanding
10 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2003-08-19.
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.
30.0%
significant & substantial
0.0%
high negligence or reckless
30.0%
reasonably likely or greater
40.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 0.0% low, 100.0% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.

Portable Rock Plant #2 recorded 0.00 reportable injury cases per 100 full-time workers in 2003.

Injury rate, 2003
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 3.76 and the all-US-mining average was 4.43 cases per 100 workers.
In Iowa, metal and nonmetal mining averaged 3.98 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
2003 * 0.00 0.00 0.000
2002 * 0.00 0.00 0.000
2001 * 9.18 9.18 0.000
2000 * 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. Knife River Midwest LLC 1950 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2007 2
2006 4
2005 11
2004 15
2003 15
2002 20
2001 21
2000 23
Source: MSHA quarterly employment and production, updated weekly.

Portable Rock Plant #2 sits in Winneshiek County, Iowa, where the Census mining category is 0.2% 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.
Winneshiek County, Iowa · Population 19,972
0.2%
Mining share of county employment
$75,652
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
2007 Q3 1 0 0 0.0
2007 Q2 1 0 0 0.0
2007 Q1 24 0 0 0.0
2006 Q4 972 0 0 0.0
2006 Q3 1,851 0 0 0.0
2006 Q2 1,837 0 0 0.0
2006 Q1 26 0 0 0.0
2005 Q4 4,023 0 0 0.0
Show 22 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2005 Q3 5,483 0 0 0.0
2005 Q2 4,835 0 0 0.0
2005 Q1 2,276 0 0 0.0
2004 Q3 4,835 0 0 0.0
2004 Q2 12,624 0 0 0.0
2004 Q1 3,001 0 0 0.0
2003 Q4 7,187 0 0 0.0
2003 Q3 8,595 8 3 930.8
2003 Q2 8,072 0 0 0.0
2003 Q1 2,475 0 0 0.0
2002 Q4 5,759 0 0 0.0
2002 Q3 8,511 0 0 0.0
2002 Q2 8,330 0 0 0.0
2002 Q1 2,496 0 0 0.0
2001 Q4 7,271 0 0 0.0
2001 Q3 7,883 2 0 253.7
2001 Q2 3,515 0 0 0.0
2001 Q1 3,116 0 0 0.0
2000 Q4 6,738 0 0 0.0
2000 Q3 9,959 0 0 0.0
2000 Q2 8,797 0 0 0.0
2000 Q1 3,715 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2001 · 1 incident

October 30, 2001 IA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Knife River Midwest LLC · Fall from machine

EE WAS STANDING ONT HE TIRES OF THE PLANT WHILE CHANING HAMMERS ON SECONDARY AND STEPPED BETWEEN THE TIRES AND FELL 3' TO THE GROUND.