Mining Incidents
Search Operators Mines Alerts Research Controllers Fatalgrams About
English Español
← Back to search

503421: 22 MSHA citations Metal/Non-Metal

Controlled by Knife River Corporation
Sauk Rapids, Benton County, MN  ·  Intermittent
MSHA Mine ID: 2103219

503421 has $2K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

Watch this mine

Email me when a new MSHA incident is filed at 503421.

Fatalities
0
Total incidents
7
Years on record
2003–2005
Latest incident
Jul 2005
Compliance record
MSHA citations since 2000
22
citations
3
significant & substantial
$1,926
proposed penalties
$1,926
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Knife River Corporation North Central's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
35
inspections on record
322
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: 322 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

503421 has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
22 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2021-08-19.
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.
13.6%
significant & substantial
0.0%
high negligence or reckless
13.6%
reasonably likely or greater
31.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 18.2% low, 81.8% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, 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: 2019-09-05, 6 years ago
0%
of limit-tested samples over the exposure limit
22
samples
20
limit-tested
Most sampled contaminants
  • Arsenic fumes10
  • Beryllium fumes10
  • Cadmium oxide fumes10
  • Chromium, insoluble10
Show the individual readings (100)
Date Contaminant Concentration Limit Conc / limit Occupation
2019-09-05 Respirable dust, <.1mg 0 Washer Operator
2019-09-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-02-19 Cadmium oxide fumes 0 100 0.00 Mechanic
2009-02-19 Chromium, insoluble 0 1 0.00 Mechanic
2009-02-19 Cobalt fumes 0 100 0.00 Mechanic
2009-02-19 Copper fumes 1.7 100 0.02 Mechanic
2009-02-19 Iron oxide fumes 0.59 10 0.06 Mechanic
2009-02-19 Lead fumes 0 150 0.00 Mechanic
2009-02-19 Arsenic fumes 0 500 0.00 Mechanic
2009-02-19 Manganese fumes 0.2 5 0.04 Mechanic
2009-02-19 Molybdenum fumes 0 10 0.00 Mechanic
2009-02-19 Nickel fumes 0 1 0.00 Mechanic
2009-02-19 Vanadium fumes 0 50 0.00 Mechanic
2009-02-19 Zinc oxide fumes 0 5 0.00 Mechanic
2009-02-19 Magnesium oxide fumes 0.05 10 0.01 Mechanic
2009-02-19 Beryllium fumes 0 2 0.00 Mechanic
2002-02-28 Aluminum oxide fumes 0.11 20 0.01 Welder, etc.
2002-02-28 Arsenic fumes 0 1500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 6 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2002-02-28 Chromium, insoluble 0.18 3 0.06 Welder, etc.
2002-02-28 Cobalt fumes 0 300 0.00 Welder, etc.
2002-02-28 Copper fumes 11.76 300 0.04 Welder, etc.
2002-02-28 Iron oxide fumes 5.4 20 0.27 Welder, etc.
2002-02-28 Lead fumes 11.76 450 0.03 Welder, etc.
2002-02-28 Magnesium oxide fumes 0.14 20 0.01 Welder, etc.
2002-02-28 Manganese fumes 0.45 5 0.09 Welder, etc.
2002-02-28 Molybdenum fumes 0.08 20 0.00 Welder, etc.
2002-02-28 Nickel fumes 0 3 0.00 Welder, etc.
2002-02-28 Titanium dioxide fumes 0 20 0.00 Welder, etc.
2002-02-28 Vanadium fumes 0 50 0.00 Welder, etc.
2002-02-28 Zinc oxide fumes 0 10 0.00 Welder, etc.
2002-02-28 Aluminum oxide fumes 0.02 20 0.00 Welder, etc.
2002-02-28 Arsenic fumes 0 1500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 6 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2002-02-28 Chromium, insoluble 0 3 0.00 Welder, etc.
2002-02-28 Cobalt fumes 0 300 0.00 Welder, etc.
2002-02-28 Copper fumes 0 300 0.00 Welder, etc.
2002-02-28 Iron oxide fumes 0.02 20 0.00 Welder, etc.
2002-02-28 Lead fumes 0 450 0.00 Welder, etc.
2002-02-28 Magnesium oxide fumes 0.01 20 0.00 Welder, etc.
2002-02-28 Manganese fumes 0 5 0.00 Welder, etc.
2002-02-28 Molybdenum fumes 0 20 0.00 Welder, etc.
2002-02-28 Nickel fumes 0 3 0.00 Welder, etc.
2002-02-28 Titanium dioxide fumes 0 20 0.00 Welder, etc.
2002-02-28 Vanadium fumes 0 50 0.00 Welder, etc.
2002-02-28 Zinc oxide fumes 0.01 10 0.00 Welder, etc.
2002-02-28 Aluminum oxide fumes 0.06 20 0.00 Welder, etc.
2002-02-28 Arsenic fumes 0 1500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 6 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2002-02-28 Chromium, insoluble 0.39 3 0.13 Welder, etc.
2002-02-28 Cobalt fumes 0 300 0.00 Welder, etc.
2002-02-28 Copper fumes 11.76 300 0.04 Welder, etc.
2002-02-28 Iron oxide fumes 9.78 20 0.49 Welder, etc.
2002-02-28 Lead fumes 3.92 450 0.01 Welder, etc.
2002-02-28 Magnesium oxide fumes 0.05 20 0.00 Welder, etc.
2002-02-28 Manganese fumes 1.11 5 0.22 Welder, etc.
2002-02-28 Molybdenum fumes 0.17 20 0.01 Welder, etc.
2002-02-28 Nickel fumes 0 3 0.00 Welder, etc.
2002-02-28 Titanium dioxide fumes 0 20 0.00 Welder, etc.
2002-02-28 Vanadium fumes 0 50 0.00 Welder, etc.
2002-02-28 Zinc oxide fumes 0.01 10 0.00 Welder, etc.
2002-02-28 Aluminum oxide fumes 0 10 0.00 Welder, etc.
2002-02-28 Arsenic fumes 0 500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 2 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2002-02-28 Chromium, insoluble 0.02 1 0.02 Welder, etc.
2002-02-28 Cobalt fumes 0 100 0.00 Welder, etc.
2002-02-28 Copper fumes 0 100 0.00 Welder, etc.
2002-02-28 Iron oxide fumes 0.8 10 0.08 Welder, etc.
2002-02-28 Lead fumes 0 150 0.00 Welder, etc.
2002-02-28 Magnesium oxide fumes 0 10 0.00 Welder, etc.
2002-02-28 Manganese fumes 0.07 5 0.01 Welder, etc.
2002-02-28 Molybdenum fumes 0.01 10 0.00 Welder, etc.
2002-02-28 Nickel fumes 0 1 0.00 Welder, etc.
2002-02-28 Titanium dioxide fumes 0 10 0.00 Welder, etc.
2002-02-28 Vanadium fumes 0 50 0.00 Welder, etc.
2002-02-28 Zinc oxide fumes 0 5 0.00 Welder, etc.
2002-02-28 Aluminum oxide fumes 0.12 20 0.01 Welder, etc.
2002-02-28 Arsenic fumes 0 1500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 6 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2002-02-28 Chromium, insoluble 0 3 0.00 Welder, etc.
2002-02-28 Cobalt fumes 0 300 0.00 Welder, etc.
2002-02-28 Copper fumes 5.88 300 0.02 Welder, etc.
2002-02-28 Iron oxide fumes 2.51 20 0.13 Welder, etc.
2002-02-28 Lead fumes 2.94 450 0.01 Welder, etc.
2002-02-28 Magnesium oxide fumes 0.23 20 0.01 Welder, etc.
2002-02-28 Manganese fumes 1.25 5 0.25 Welder, etc.
2002-02-28 Molybdenum fumes 0 20 0.00 Welder, etc.
2002-02-28 Nickel fumes 0 3 0.00 Welder, etc.
2002-02-28 Titanium dioxide fumes 0.24 20 0.01 Welder, etc.
2002-02-28 Vanadium fumes 0 50 0.00 Welder, etc.
2002-02-28 Zinc oxide fumes 0.01 10 0.00 Welder, etc.
2002-02-28 Aluminum oxide fumes 0.16 20 0.01 Welder, etc.
2002-02-28 Arsenic fumes 0 1500 0.00 Welder, etc.
2002-02-28 Beryllium fumes 0 6 0.00 Welder, etc.
2002-02-28 Cadmium oxide fumes 0 100 0.00 Welder, etc.
Showing 100 of 160 laboratory readings: every over-limit reading, then the most recent. MSHA reads one air sample several times, so readings outnumber the samples counted above. The full set is in MSHA's Personal Health Samples file.
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. Knife River Corporation North Central 1999 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 2
2025 3
2024 3
2023 3
2022 4
2021 3
2020 3
2019 3
2018 4
2017 4
2016 4
2015 4
2014 4
2013 4
2012 5
2011 5
2010 5
2009 6
2008 5
2007 9
2006 10
2005 16
2004 16
2003 10
2002 10
2001 6
2000 4
Source: MSHA quarterly employment and production, updated weekly.

503421 sits in Benton County, Minnesota, where the Census mining category is 0.1% 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.
Benton County, Minnesota · Population 41,458
0.1%
Mining share of county employment
$71,480
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 1,609 0 0 0.0
2026 Q1 1 0 0 0.0
2025 Q4 841 0 0 0.0
2025 Q3 1,585 0 0 0.0
2025 Q2 1,691 0 0 0.0
2025 Q1 1 0 0 0.0
2024 Q4 601 0 0 0.0
2024 Q3 1,585 0 0 0.0
Show 94 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 2,340 0 0 0.0
2024 Q1 1 0 0 0.0
2023 Q4 1,081 0 0 0.0
2023 Q3 1,561 0 0 0.0
2023 Q2 2,341 0 0 0.0
2023 Q1 1 0 0 0.0
2022 Q4 1,079 0 0 0.0
2022 Q3 478 0 0 0.0
2022 Q2 2,067 0 0 0.0
2022 Q1 1 0 0 0.0
2021 Q4 216 0 0 0.0
2021 Q3 379 1 0 2638.5
2021 Q2 502 0 0 0.0
2021 Q1 21 0 0 0.0
2020 Q4 109 0 0 0.0
2020 Q3 415 0 0 0.0
2020 Q2 409 0 0 0.0
2020 Q1 1 0 0 0.0
2019 Q4 215 1 0 4651.2
2019 Q3 365 0 0 0.0
2019 Q2 397 0 0 0.0
2019 Q1 1 0 0 0.0
2018 Q4 226 0 0 0.0
2018 Q3 533 0 0 0.0
2018 Q2 590 0 0 0.0
2017 Q1 681 0 0 0.0
2016 Q4 361 0 0 0.0
2016 Q3 361 0 0 0.0
2016 Q2 681 0 0 0.0
2016 Q1 681 0 0 0.0
2015 Q4 361 1 0 2770.1
2015 Q3 681 0 0 0.0
2015 Q2 681 0 0 0.0
2015 Q1 681 0 0 0.0
2014 Q4 681 1 0 1468.4
2014 Q3 681 0 0 0.0
2014 Q2 681 0 0 0.0
2014 Q1 681 0 0 0.0
2013 Q4 681 0 0 0.0
2013 Q3 301 0 0 0.0
2013 Q2 601 0 0 0.0
2013 Q1 705 0 0 0.0
2012 Q4 688 0 0 0.0
2012 Q3 308 0 0 0.0
2012 Q2 2,608 0 0 0.0
2012 Q1 710 1 0 1408.5
2011 Q4 608 0 0 0.0
2011 Q3 308 0 0 0.0
2011 Q2 1,658 0 0 0.0
2011 Q1 710 0 0 0.0
2010 Q4 608 0 0 0.0
2010 Q3 308 0 0 0.0
2010 Q2 1,670 0 0 0.0
2010 Q1 710 0 0 0.0
2009 Q4 168 0 0 0.0
2009 Q3 308 0 0 0.0
2009 Q2 1,820 0 0 0.0
2009 Q1 4,320 1 0 231.5
2008 Q4 128 0 0 0.0
2008 Q3 308 0 0 0.0
2008 Q2 1,824 0 0 0.0
2008 Q1 3,840 0 0 0.0
2007 Q4 3,600 6 0 1666.7
2007 Q3 854 0 0 0.0
2007 Q2 3,100 0 0 0.0
2007 Q1 4,078 0 0 0.0
2006 Q4 4,063 5 0 1230.6
2006 Q3 4,021 0 0 0.0
2006 Q2 4,709 0 0 0.0
2006 Q1 5,024 0 0 0.0
2005 Q4 1,185 0 0 0.0
2005 Q3 5,331 0 0 0.0
2005 Q2 5,333 0 0 0.0
2005 Q1 5,288 0 0 0.0
2004 Q4 590 0 0 0.0
2004 Q3 145 0 0 0.0
2004 Q2 245 0 0 0.0
2004 Q1 5,258 0 0 0.0
2003 Q4 516 0 0 0.0
2003 Q3 109 0 0 0.0
2003 Q2 44 0 0 0.0
2003 Q1 3,860 0 0 0.0
2002 Q4 380 0 0 0.0
2002 Q3 45 0 0 0.0
2002 Q2 972 0 0 0.0
2002 Q1 750 2 1 2666.7
2001 Q4 1,000 0 0 0.0
2001 Q3 41 0 0 0.0
2001 Q2 324 0 0 0.0
2001 Q1 6,400 0 0 0.0
2000 Q4 1,620 3 2 1851.9
2000 Q3 0 0 0
2000 Q2 290 0 0 0.0
2000 Q1 4,452 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

7 on file

2005 · 2 incidents

July 7, 2005 MN · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Knife River Corporation North Central · Struck by... (Not Elsewhere Classified)

Employee was in the shop changing a cone and got a foregn body in his right eye.

February 2, 2005 MN · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Knife River Corporation North Central · Contact with hot objects or substances

EE WAS WELDING AND A PIECE OF SLAG GOT INTO HIS EYE

2004 · 3 incidents

December 14, 2004 MN · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Knife River Corporation North Central · Struck by... (Not Elsewhere Classified)

EE WAS UNDERNEATH CONVEYOR, GRINDING OFF RUST ON CONVEYOR FRAME. EE GOT A PARTICLE IN HIS LEFT EYE. (PARTICLE OFF CONVEYOR FRAME WAS EXTRACTED WITH FORCEPS.)

August 27, 2004 MN · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Knife River Corporation North Central · Struck against stationary object

Ee was changing cone on crusher. A metal burr was protruding from the crusher bowl.

January 16, 2004 MN · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Knife River Corporation North Central · Struck by... (Not Elsewhere Classified)

EMPLOYEE THINKS HE WAS USING A GRINDER AT THE TIME OF INJURY. EXACT CAUSE BELIEVED TO BE GRINDER USE.

2003 · 2 incidents

September 26, 2003 MN · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Knife River Corporation North Central · Caught in, under or between (Not Elsewhere Classified)

EE WAS USING A MAUL AND FENCE POST TO BREAK UP ASPHALT IN THE JAW. THE HANDLE OF THE MAUL PINCHED EE'S THUMB BETWEEN THE MAUL HANDLE AND FENCE POST.