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Portable #4 Metal/Non-Metal

Fraser Construction · Surface
Controlled by Rick Penz
Rochester, Olmsted County, MN  ·  Abandoned
MSHA Mine ID: 2103598

MSHA record for Portable #4 (mine ID 2103598). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.

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Fatalities
0
Total incidents
0
Years on record
—
Latest incident
—
Inspection activity
MSHA inspections since 2007
5
inspections on record
35
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: 35 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, 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: 2009-05-20, 17 years ago
0%
of limit-tested samples over the exposure limit
2
samples
2
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz2
Show the individual readings (2)
Date Contaminant Concentration Limit Conc / limit Occupation
2009-05-20 Quartz, respirable, >1% Qtz 0.59 1.34 0.44 Front-end Loader Operator
2009-05-20 Quartz, respirable, >1% Qtz 0.19 1.29 0.15 Front-end Loader Operator
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. Fraser Construction 2007 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2011 1
2010 1
2009 2
2008 1
2007 2
Source: MSHA quarterly employment and production, updated weekly.

Portable #4 sits in Olmsted County, Minnesota, where the Census mining category is 0.0% 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.
Olmsted County, Minnesota · Population 163,425
0.0%
Mining share of county employment
$93,494
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
2011 Q2 4 0 0 0.0
2011 Q1 2 0 0 0.0
2010 Q4 2 0 0 0.0
2010 Q3 2 0 0 0.0
2010 Q2 2 0 0 0.0
2010 Q1 5 0 0 0.0
2009 Q4 80 0 0 0.0
2009 Q3 160 0 0 0.0
Show 5 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2009 Q2 110 0 0 0.0
2008 Q3 2 0 0 0.0
2008 Q2 4 0 0 0.0
2008 Q1 4 0 0 0.0
2007 Q4 130 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.