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: 558 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Kasota Quarry has $11K in proposed MSHA penalties and $0 outstanding across 5 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.
$11K
proposed penalties
$11K
current assessed
$11K
paid to date
$0
outstanding
71 assessments are final orders; 5 contested dockets.
Of $3K in penalties contested before the Commission, $3K was upheld in final decisions.
As of the most recent assessment on 2024-08-09.
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.
12citations taken to the federal commission · 17% of citations on record
Settled
9 · 75%
Stood as issued
1 · 8%
Vacated or withdrawn
2 · 17%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
16%
Penalty reduction in decided contests
$3K proposed, $3K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2015-01-13.
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: 2026-03-10
35%
of limit-tested samples over the exposure limit
36
samples
26
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz269 over
Respirable dust, <.1mg9
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (36)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2023-07-26
Quartz, respirable, >1% Qtz
0.49
0.29
1.69
Utility Man
2023-07-26
Quartz, respirable, >1% Qtz
0.45
0.24
1.88
Utility Man
2021-10-26
Quartz, respirable, >1% Qtz
0.34
0.23
1.48
Utility Man
2012-10-02
Quartz, respirable, >1% Qtz
0.3
0.28
1.07
Cleanup Man
2011-06-28
Quartz, respirable, >1% Qtz
0.3
0.2
1.50
Cleanup Man
2011-06-28
Quartz, respirable, >1% Qtz
0.24
0.17
1.41
Crusher Oper/Worker
2011-05-18
Quartz, respirable, >1% Qtz
0.32
0.24
1.33
Cleanup Man
2011-05-18
Quartz, respirable, >1% Qtz
0.25
0.24
1.04
Crusher Oper/Worker
2011-05-18
Quartz, respirable, >1% Qtz
0.49
0.21
2.33
Crusher Oper/Worker
2026-03-10
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-03-10
Respirable dust, <.1mg
0
Bulldozer Operator
2023-08-24
Quartz, respirable, >1% Qtz
0.14
0.37
0.38
Utility Man
2023-08-24
Quartz, respirable, >1% Qtz
0.22
0.25
0.88
Utility Man
2023-08-24
Quartz, respirable, >1% Qtz
0.15
0.37
0.41
Utility Man
2023-07-26
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-07-26
Quartz, respirable, >1% Qtz
0.25
0.28
0.89
Utility Man
2023-07-26
Quartz, respirable, >1% Qtz
0.21
0.22
0.95
Utility Man
2022-06-02
Quartz, respirable, >1% Qtz
0.24
0.51
0.47
Utility Man
2021-10-26
Quartz, respirable, >1% Qtz
0.2
0.21
0.95
Crusher Oper/Worker
2021-10-26
Quartz, respirable, >1% Qtz
0.17
0.42
0.40
Utility Man
2018-05-23
Respirable dust, <.1mg
0
Utility Man
2018-05-23
Unlisted Particulate, respirable, <1% Qtz
0.19
Front-end Loader Operator
2014-11-05
Quartz, respirable, >1% Qtz
0.31
0.32
0.97
Cleanup Man
2014-11-05
Quartz, respirable, >1% Qtz
0.38
1.19
0.32
Front-end Loader Operator
2014-11-05
Quartz, respirable, >1% Qtz
0.13
0.35
0.37
Crusher Oper/Worker
2014-11-05
Respirable dust, <.1mg
0
Crusher Oper/Worker
2012-10-02
Quartz, respirable, >1% Qtz
0.22
0.26
0.85
Crusher Oper/Worker
2012-10-02
Quartz, respirable, >1% Qtz
0.23
0.25
0.92
Crusher Oper/Worker
2012-10-02
Quartz, respirable, >1% Qtz
0.61
0.91
0.67
Front-end Loader Operator
2011-08-02
Respirable dust, <.1mg
0
Cleanup Man
2011-08-02
Respirable dust, <.1mg
0
Cleanup Man
2004-06-22
Quartz, respirable, >1% Qtz
0.52
0.58
0.90
Crusher Oper/Worker
2004-06-22
Quartz, respirable, >1% Qtz
0.49
1.18
0.42
Utility Man
2004-06-22
Quartz, respirable, >1% Qtz
0.43
1.4
0.31
Backhoe Operator
2004-06-22
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-04-16
Respirable dust, <.1mg
0
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.
Kasota Quarry recorded 7.73 reportable injury cases per 100 full-time workers in 2007.
Injury rate, 2007
ⓘ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.
7.73
total case rate
7.73
days-away rate
0.000
fatality rate
Above average. The US metal and nonmetal mining average was 3.30 and the all-US-mining average was 3.77 cases per 100 workers.
In Minnesota, metal and nonmetal mining averaged 2.50 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
2007 *
7.73
7.73
0.000
2006 *
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
5
2025
2
2024
3
2023
5
2022
6
2021
7
2020
6
2019
6
2018
6
2017
7
2016
7
2015
6
2014
8
2013
7
2012
9
2011
7
2010
7
2009
7
2008
10
2007
12
2006
10
2005
7
2004
6
2003
6
2002
8
2001
8
2000
7
Source: MSHA quarterly employment and production, updated weekly.
Kasota Quarry sits in Blue Earth 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.
Blue Earth County, Minnesota · Population 69,386
0.1%
Mining share of county employment
$72,623
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
Employee was staged in designated safe area for blast, along with 2 other employees. When the blast was initiated, a fly rock approximately 5" x 6" x 2" struck an employee in the right hand index finger and knuckle, landing approximately 30 feet behind EE.
2021 · 1 incident
August 18, 2021MN · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
EE was replacing shanks on a loader bucket. EE got a bolt partially loose and it dropped out of square shank. EE held it up with hand and when EE hit it with the impact, it spun and cut EE's right hand.
2015 · 2 incidents
May 26, 2015MN · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
Employee was cutting a piece of torn belting that was wrapped around a head pulley shaft, when the utility knife slipped. He cut the inside of his left wrist.
January 5, 2015MN · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorDISORDERS (REPEATED TRAUMA)
November 23, 2013MN · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EE was leaning over the undercarriage attempting to grab his lifting chain while installing the belly pans. EE was leaning directly over the lifting eye. He grabbed the his chain and was backing out away from the undercarriage when the lifting eye caused a contusion to his left chest area.
2007 · 1 incident
October 16, 2007MN · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
Working on a cone crusher changing liners. During a procedure of setting nuts into a tramp iron system, worker got his right hand 1st digit finger pinched setting one of the nuts.
1997 · 1 incident
August 4, 1997MN · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
EE WAS LIFTING BLOCKING AND SCREEN & FELT SOME DISCOMFORT IN HIS BACK & LEGS. HE FINISHED THE DAY WORKING. NEXT DAY, HE HAD A LOT OF PAIN IN HIS LOWER BACK.
1996 · 1 incident
March 5, 1996MN · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
EMPLOYEE WAS HOLDING A BAR WHILE ANOTHER EMPLOYEE WAS USING A SLEDGE HAMMER TO HIT THE BAR TO LOOSEN A ROCK STUCK IN A TAIL PULLEY THE HAMMER BOUNCED OFF THE BAR BACK UP INTO THE EMPLOYEE HOLD ING THE BAR MOUTH PRELIMINARY DAMAGE ARE TWO CHIPPED TOP FRONT TEETH
EMPLOYEE WAS TRYING TO UNPLUG THE CONE ON THE CRUSHING PLANT WITH A SPECIAL ROD. WHEN HE PUT THE ROD INTO THE CONE, THE ROD FLEW DIRECTLY UP INTO HIS FACE.
June 2, 1993MN · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverHANDLING OF MATERIALS
AFTER LOADING A PIECE OF EQUIPMENT ONTO THE TRUCK TRAILER, HE WAS LOADING SOME TIMBER USED TO LOAD THE PIECE OF EQUIPMENT. WHILE PLACING THE TIMBER DOWN ON THE TRAILER, HIS LEFT LITTLE FINGER WAS PINCHED CAUSING THE TIP OF THE FINGER TO BE BROKEN AND CAUSING A CUT DOWN THE SAME FINGER.
Related mines
Other mines operated by Martin Marietta Materials Inc.