US Aggregates-Monon Quarry has $20K 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
9
Years on record
1996–2010
Latest incident
Sep 2010
Compliance record
MSHA citations since 2000
79
citations
29
significant & substantial
$20,331
proposed penalties
$20,331
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
68
inspections on record
986
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: 986 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
US Aggregates-Monon Quarry has $20K 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.
$20K
proposed penalties
$20K
current assessed
$20K
paid to date
$0
outstanding
79 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-04-29.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
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
2025 Q4
4,826
0
0
0.0
2025 Q3
5,072
0
0
0.0
2025 Q2
5,282
1
0
189.3
2025 Q1
4,511
0
0
0.0
2024 Q4
3,303
5
3
1513.8
2024 Q3
3,240
0
0
0.0
2024 Q2
4,118
6
3
1457.0
2024 Q1
4,393
0
0
0.0
Show 96 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
4,185
6
3
1433.7
2023 Q3
6,273
0
0
0.0
2023 Q2
5,818
1
0
171.9
2023 Q1
4,018
0
0
0.0
2022 Q4
5,098
2
0
392.3
2022 Q3
3,507
0
0
0.0
2022 Q2
3,368
0
0
0.0
2022 Q1
3,145
4
2
1271.9
2021 Q4
2,630
0
0
0.0
2021 Q3
3,399
0
0
0.0
2021 Q2
3,676
0
0
0.0
2021 Q1
3,374
0
0
0.0
2020 Q4
4,128
0
0
0.0
2020 Q3
3,524
2
0
567.5
2020 Q2
4,795
0
0
0.0
2020 Q1
2,742
0
0
0.0
2019 Q4
2,318
0
0
0.0
2019 Q3
1,205
0
0
0.0
2019 Q2
1,320
0
0
0.0
2019 Q1
1,058
0
0
0.0
2018 Q4
2,685
0
0
0.0
2018 Q3
1,027
0
0
0.0
2018 Q2
1,084
0
0
0.0
2018 Q1
1,532
0
0
0.0
2017 Q4
2,137
0
0
0.0
2017 Q3
3,107
0
0
0.0
2017 Q2
4,950
0
0
0.0
2017 Q1
3,775
3
2
794.7
2016 Q4
4,674
0
0
0.0
2016 Q3
4,957
0
0
0.0
2016 Q2
4,525
0
0
0.0
2016 Q1
3,745
0
0
0.0
2015 Q4
4,763
0
0
0.0
2015 Q3
5,054
0
0
0.0
2015 Q2
4,288
0
0
0.0
2015 Q1
2,833
0
0
0.0
2014 Q4
5,061
0
0
0.0
2014 Q3
4,860
0
0
0.0
2014 Q2
4,329
0
0
0.0
2014 Q1
3,562
0
0
0.0
2013 Q4
5,299
0
0
0.0
2013 Q3
5,224
1
0
191.4
2013 Q2
4,925
0
0
0.0
2013 Q1
3,819
0
0
0.0
2012 Q4
4,214
0
0
0.0
2012 Q3
4,614
0
0
0.0
2012 Q2
4,746
0
0
0.0
2012 Q1
3,968
0
0
0.0
2011 Q4
4,668
0
0
0.0
2011 Q3
5,070
0
0
0.0
2011 Q2
4,353
0
0
0.0
2011 Q1
2,710
1
0
369.0
2010 Q4
3,845
0
0
0.0
2010 Q3
5,581
0
0
0.0
2010 Q2
5,247
1
0
190.6
2010 Q1
4,184
0
0
0.0
2009 Q4
5,029
0
0
0.0
2009 Q3
5,173
2
0
386.6
2009 Q2
5,361
0
0
0.0
2009 Q1
3,308
1
0
302.3
2008 Q4
3,864
0
0
0.0
2008 Q3
5,293
0
0
0.0
2008 Q2
5,664
0
0
0.0
2008 Q1
4,043
1
0
247.3
2007 Q4
4,988
0
0
0.0
2007 Q3
6,322
0
0
0.0
2007 Q2
6,294
5
1
794.4
2007 Q1
5,322
2
0
375.8
2006 Q4
4,944
0
0
0.0
2006 Q3
5,945
2
1
336.4
2006 Q2
5,548
0
0
0.0
2006 Q1
5,261
2
0
380.2
2005 Q4
5,290
0
0
0.0
2005 Q3
5,389
0
0
0.0
2005 Q2
5,639
0
0
0.0
2005 Q1
2,970
0
0
0.0
2004 Q4
5,112
0
0
0.0
2004 Q3
6,020
0
0
0.0
2004 Q2
5,897
0
0
0.0
2004 Q1
3,523
0
0
0.0
2003 Q4
4,845
2
0
412.8
2003 Q3
5,653
0
0
0.0
2003 Q2
7,257
3
2
413.4
2003 Q1
2,941
2
2
680.0
2002 Q4
7,112
6
5
843.6
2002 Q3
8,694
5
2
575.1
2002 Q2
9,473
0
0
0.0
2002 Q1
4,736
1
0
211.1
2001 Q4
6,687
0
0
0.0
2001 Q3
6,624
0
0
0.0
2001 Q2
5,396
3
1
556.0
2001 Q1
3,586
0
0
0.0
2000 Q4
6,756
0
0
0.0
2000 Q3
7,716
0
0
0.0
2000 Q2
5,393
6
2
1112.6
2000 Q1
5,209
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
9 on file
2010 · 1 incident
September 8, 2010IN · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
Employee was cutting a fouled metal strap out of the primary feeder with a torch. When strap cut through stored energy in the metal strap (not recognized) caused the strap to swing toward the employee striking his right forearm resulting in a broken bone.
EE WAS MONITORING PROGRESS OF WASH SCREEN SHAFT REMOVAL. WHEN THE SHAFT DROPPED OUT, IT UNEXPECTEDLY SLID ALONG A HANDRAIL & CREATED A CHAIN OF EVENTS THAT RESULTED IN A URETHANE SCREEN PANEL TIPPING OVER FROM STORED POSITION. EE HAD MOVED BACKWARD & LOST FOOTING FALLING TO THE SAME SURFACE IN LINE WITH THE SCREEN TRAJECTORY. CUT RT EYEBROW.
EE WAS PREPARING TO REPLACE A BEARING ON THE WASH SCREEN. AS HE WAS TRYING TO TAP OFF THE INNER RACE BY HITTING IT WITH A HAMMER HE FELT SOMETHING HIT HIM IN THE LEG. AFTER COMPLETING THE JOB HE SOUGHT MEDICAL ATTENTION. A PIECE OF METAL WAS REMOVED FROM HIS UPPER THIGH WHICH REQUIRED SUTURES. DIVISION OFFICE WAS NOT NOTIFIED OF INCIDENT UNTIL 7-31-00.
1999 · 2 incidents
August 30, 1999IN · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
AS EE WAS DESCENDING LOADER HE SLIPPED ON THE LAST STEP AND FELL STRIKING HIS LEFT SHOULDER AND ELBOW ON GROUND. ON 9-1 HE SOUGHT MEDICAL ATTENTION AND WAS RETURNED TO WORK WITH RESTRICTIONS F OR THE REST OF THE WEEK.
EE WAS ATTEMPTING TO REMOVE A KING FROM A PUMP DISCHARGE HOSE USING A COME-A-ALONG, ATTACHED TO THE PLATFORM STRUCTURE OF AN AERIAL MANLIFT DEVICE. WHEN TENSION WAS APPLIED BY WITHDRAWING THE PLATFORM, THE COME-A-ALONG HANDLE FLIPPED AROUNDSTRIKING AND MOVING THE SAFETY BAR ON THE PLATFORM. THE SAFETY BAR PINCHED HIS THUMB AGAINST THE MAIN BAR.
1997 · 1 incident
July 15, 1997IN · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSTRIKING OR BUMPING
EMPLOYEE WAS WALKING BEHIND MAINTENANCE TRUCK WHEN HE CAM EINTO CONTACT WITH A STEEL STRAP. THIS RESULTED IN A LACERATION TO HIS FOREHEAD WHICH REQUIRED STITCHES.
EMPLOYEE WAS HOLDING A PUNCH ON THE INSIDE OF THE TRACKS ON A CRANE. HIS TASK WAS TO KEEP THE PUNCH CENTERED ON A DRIVE CHAIN LINK PIN THAT ANOTHER EMPLOYEE WAS DRIVING OUT BY STRIKING THE OP POSITE END OF THE PUNCH ON THE OUTSIDE OF THE TRACKS. APPEARS TAHT A SPLINTER OF STEEL FROM THEPIN DISLODGED STRIKING THE HOLDER'S RIGHT WRIST, BY PASSING BETWEEN GLOVE AND JACKET SLEEVE.
For insurers, brokers, and safety consultants
The full compliance file on US Aggregates-Monon Quarry
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and
docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF
with the underlying data as CSV.