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.
168 citations across 1,145 inspection hours.
Source: MSHA inspections data, updated weekly.
Lemke Stone Inc has $29K in proposed MSHA penalties and $0 outstanding across 2 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.
$29K
proposed penalties
$29K
current assessed
$29K
paid to date
$0
outstanding
168 assessments are final orders; 2 contested dockets.
Of $6K in penalties contested before the Commission, $6K was upheld in final decisions.
As of the most recent assessment on 2026-03-26.
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.
8citations taken to the federal commission · 5% of citations on record
Settled
8 · 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 3 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$6K proposed, $6K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2016-02-28.
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: 2025-12-16
11%
of limit-tested samples over the exposure limit
20
samples
18
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz142 over
Nuisance dust, respirable, <1% Qtz6
Show the individual readings (20)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2003-01-14
Quartz, respirable, >1% Qtz
3.11
2.44
1.27
Utility Man
2003-01-14
Quartz, respirable, >1% Qtz
3.87
2.89
1.34
Utility Man
2025-12-16
Quartz, respirable, >1% Qtz
0.51
Cutting Mach Operator
2025-12-16
Quartz, respirable, >1% Qtz
0.49
Cutting Mach Operator
2019-11-20
Nuisance dust, respirable, <1% Qtz
0.17
10
0.02
Stone Polisher/Cutter
2019-11-20
Nuisance dust, respirable, <1% Qtz
0.21
10
0.02
Stone Polisher/Cutter
2019-11-20
Nuisance dust, respirable, <1% Qtz
0.16
10
0.02
Stone Polisher/Cutter
2014-02-05
Quartz, respirable, >1% Qtz
0.69
3.28
0.21
Laborer, Bullgang
2014-02-05
Quartz, respirable, >1% Qtz
0.27
1.94
0.14
Laborer, Bullgang
2008-01-24
Quartz, respirable, >1% Qtz
0.77
3.22
0.24
Stone Polisher/Cutter
2005-01-20
Nuisance dust, respirable, <1% Qtz
0.57
10
0.06
Stone Polisher/Cutter
2005-01-20
Quartz, respirable, >1% Qtz
0.74
2.52
0.29
Stone Polisher/Cutter
2005-01-20
Nuisance dust, respirable, <1% Qtz
0.8
10
0.08
Stone Polisher/Cutter
2005-01-20
Quartz, respirable, >1% Qtz
0.6
2.61
0.23
Stone Polisher/Cutter
2005-01-20
Nuisance dust, respirable, <1% Qtz
0.73
10
0.07
Laborer, Bullgang
2003-06-24
Quartz, respirable, >1% Qtz
1.55
1.94
0.80
Utility Man
2003-06-24
Quartz, respirable, >1% Qtz
1.16
2.11
0.55
Utility Man
2003-01-14
Quartz, respirable, >1% Qtz
1.2
2.83
0.42
Utility Man
2003-01-14
Quartz, respirable, >1% Qtz
1.12
2.83
0.40
Utility Man
2003-01-14
Quartz, respirable, >1% Qtz
1.1
3.22
0.34
Utility Man
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.
Lemke Stone Inc recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘ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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 1.80 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
2025 *
0.00
0.00
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2018 *
9.49
9.49
0.000
2017 *
9.34
0.00
0.000
2016 *
17.90
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
24
2025
23
2024
20
2023
18
2022
17
2021
16
2020
15
2019
14
2018
14
2017
16
2016
15
2015
15
2014
13
2013
12
2012
11
2011
12
2010
12
2009
13
2008
14
2007
13
2006
14
2005
15
2004
15
2003
16
2002
14
2001
11
2000
10
Source: MSHA quarterly employment and production, updated weekly.
Lemke Stone Inc sits in Waukesha County, Wisconsin, 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.
Waukesha County, Wisconsin · Population 409,040
0.1%
Mining share of county employment
$104,100
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
9,931
0
0
0.0
2026 Q1
8,593
1
0
116.4
2025 Q4
10,185
0
0
0.0
2025 Q3
10,513
0
0
0.0
2025 Q2
8,515
0
0
0.0
2025 Q1
8,977
0
0
0.0
2024 Q4
8,562
0
0
0.0
2024 Q3
9,764
4
0
409.7
Show 97 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
8,015
0
0
0.0
2024 Q1
8,231
0
0
0.0
2023 Q4
7,742
3
0
387.5
2023 Q3
7,450
0
0
0.0
2023 Q2
6,550
0
0
0.0
2023 Q1
7,455
1
0
134.1
2022 Q4
6,178
1
0
161.9
2022 Q3
6,992
0
0
0.0
2022 Q2
6,314
0
0
0.0
2022 Q1
6,212
2
0
322.0
2021 Q4
5,352
0
0
0.0
2021 Q3
6,175
0
0
0.0
2021 Q2
5,608
0
0
0.0
2021 Q1
4,356
0
0
0.0
2020 Q4
4,569
3
1
656.6
2020 Q2
5,165
0
0
0.0
2020 Q1
4,762
0
0
0.0
2019 Q4
4,764
0
0
0.0
2019 Q3
4,731
0
0
0.0
2019 Q2
5,671
0
0
0.0
2019 Q1
4,367
2
0
458.0
2018 Q4
5,130
0
0
0.0
2018 Q3
5,188
0
0
0.0
2018 Q2
5,485
3
1
546.9
2018 Q1
5,264
0
0
0.0
2017 Q4
5,361
3
0
559.6
2017 Q3
5,900
0
0
0.0
2017 Q2
5,661
6
0
1059.9
2017 Q1
4,502
5
0
1110.6
2016 Q4
5,264
0
0
0.0
2016 Q3
6,053
1
0
165.2
2016 Q2
5,624
0
0
0.0
2016 Q1
5,408
0
0
0.0
2015 Q4
6,014
14
3
2327.9
2015 Q3
6,673
3
1
449.6
2015 Q2
5,783
0
0
0.0
2015 Q1
4,572
12
1
2624.7
2014 Q4
5,928
0
0
0.0
2014 Q3
5,133
0
0
0.0
2014 Q2
4,992
0
0
0.0
2014 Q1
4,674
0
0
0.0
2013 Q4
4,777
0
0
0.0
2013 Q3
5,034
0
0
0.0
2013 Q2
4,775
8
0
1675.4
2013 Q1
4,700
0
0
0.0
2012 Q4
4,953
0
0
0.0
2012 Q3
4,859
2
0
411.6
2012 Q2
4,655
0
0
0.0
2012 Q1
4,660
2
0
429.2
2011 Q4
4,645
0
0
0.0
2011 Q3
4,683
1
1
213.5
2011 Q2
4,685
0
0
0.0
2011 Q1
4,717
0
0
0.0
2010 Q4
5,327
0
0
0.0
2010 Q3
5,228
10
4
1912.8
2010 Q2
5,091
0
0
0.0
2010 Q1
4,705
7
3
1487.8
2009 Q4
5,127
0
0
0.0
2009 Q3
5,741
2
2
348.4
2009 Q2
5,424
0
0
0.0
2009 Q1
5,124
3
2
585.5
2008 Q4
6,190
0
0
0.0
2008 Q3
6,936
0
0
0.0
2008 Q2
6,417
0
0
0.0
2008 Q1
5,653
3
0
530.7
2007 Q4
6,666
0
0
0.0
2007 Q3
6,767
3
1
443.3
2007 Q2
6,340
0
0
0.0
2007 Q1
7,073
3
2
424.1
2006 Q4
7,001
0
0
0.0
2006 Q3
7,183
0
0
0.0
2006 Q2
6,979
5
2
716.4
2006 Q1
6,466
0
0
0.0
2005 Q4
6,201
5
0
806.3
2005 Q3
7,435
4
0
538.0
2005 Q2
6,712
0
0
0.0
2005 Q1
6,306
5
1
792.9
2004 Q4
6,090
0
0
0.0
2004 Q3
6,855
3
0
437.6
2004 Q2
6,100
0
0
0.0
2004 Q1
5,804
4
0
689.2
2003 Q4
5,937
0
0
0.0
2003 Q3
6,892
0
0
0.0
2003 Q2
6,873
6
3
873.0
2003 Q1
5,822
12
2
2061.1
2002 Q4
5,072
0
0
0.0
2002 Q3
6,457
2
0
309.7
2002 Q2
7,081
2
0
282.4
2002 Q1
6,433
0
0
0.0
2001 Q4
5,029
0
0
0.0
2001 Q3
5,177
9
2
1738.5
2001 Q2
4,387
0
0
0.0
2001 Q1
4,182
0
0
0.0
2000 Q4
3,850
1
0
259.7
2000 Q3
4,611
0
0
0.0
2000 Q2
4,195
0
0
0.0
2000 Q1
3,776
1
0
264.8
No fatalities recorded at this mine.
Reportable incidents
15 on file
2026 · 1 incident
August 26, 2026WI · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverHANDLING OF MATERIALS
Miner was loading boxes into truck lost footing and fell against the truck, striking left shoulder on truck.
2019 · 1 incident
March 5, 2019WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
Lemke Stone Inc · Caught in, under or between running or meshing objects
Removing scrap stone from hydraulic splitter, conveyor started and their glove got caught in conveyor belt and pulled left hand under belt.
2018 · 1 incident
February 13, 2018WI · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
2/13 EE was lifting a piece of stone from the pan on to the Thin Line machine when EE felt slight throbbing to lower left side and worked until shift end 3:30pm.
2017 · 1 incident
May 18, 2017WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
EE was lifting a piece of Flagstone and felt and heard a popping sound from the left side of back. Went back to work that day and 4 more days totaling a 40 hour work week. First went to doctor, Monday, August 1, 2016.
April 27, 2016WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
He was carrying a 10 lb. stone from a conveyor belt to a pallet. When he stepped off the 3 inch platform, he heard and felt a "pop" on the left side of his spine. Within 30 min, he was experiencing pain and weakness in his back and left leg.
2005 · 1 incident
August 18, 2005WI · Metal/Non-Metalbelt foreman, maintenance foreman, maintenance supervisorHANDLING OF MATERIALS
He was shrink wrapping pallets of stone, walking around the pallets and he caught his left calf (leg) on a stone from another pallet. He stopped work & went into 1st aid area, cleaned out wound, stopped bleeding - it was covered with a sterile dressing. He went to walk in clinic to get 3 stitches. Returned to work light duty.
June 4, 2004WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Employee was mannually lifting a boulder to get it out of the way-he felt a pull or strain in his l groin area. set boulder down-felt pain when he stood up-trying to continue working but pain increased went to emergency room after he told supervisor what happened. possible l groin pull off 6-5-04.
June 1, 2004WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
EE WAS HAND-TRIMMING BEDFORD COPING STONE - 36" X 20" X 2 1/4". PIECES WERE ON FLOOR SITTING ON A PALLET (WEIGHT APPROX. 50 - 70 LBS). EE WAS LIFTING STONE FROM PALLET WITH BOTH HANDS TO WAIST HEIGHT. DURING LIFT HE FELT A "POP" IN HIS SHOULDER (LEFT). INCREASED PAIN IN L. SHOULDER FOLLOWING "POP" DURING ANY MOVEMENT - STOPPED WORKING AFTER IT WOULDN'T STOP HURTING.
2003 · 1 incident
October 23, 2003WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
WASUSING A CHISEL AND HAMMER TO TRIM STONE-ACCIDENTLY HIT RIGHT HAND WITH HAMMER-TWICE. AREA SWOLLEN AND PAINFUL USED ICE PACK AND WENT TO CLINIC FOR X RAY.
1998 · 1 incident
June 26, 1998WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSTRIKING OR BUMPING
OVER THE COURSE OF 2-3 WEEKS, EMPLOYEE NOTICED PAIN IN SHOULDER AREA. PAIN HAS GOTTEN PROGRESSIVELY WORSE. EMPLOYEE NOTIFIED EMPLOYER OF PAIN AND WILL BE MAKING AN APPOINTMENT WITH THE DR. THI S WEEK. APPEARS TO BE A PULLED MUSCLE OR STRAIN FROM PICKING UP STONE OR CUTTING/SPLITTING STONE. AT THIS POINT, UNSURE IF THIS QULIFIES AS MEDICAL TREATMENT OR FIRST AID.
1992 · 1 incident
June 2, 1992WI · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanFIRE