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.
104 citations across 1,055 inspection hours.
Source: MSHA inspections data, updated weekly.
PLANT #1 has $11K in proposed MSHA penalties and $0 outstanding across 3 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
104 assessments are final orders; 3 contested dockets.
Of $1K in penalties contested before the Commission, $1K was upheld in final decisions.
As of the most recent assessment on 2025-12-11.
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.
13citations taken to the federal commission · 13% of citations on record
Settled
10 · 77%
Stood as issued
1 · 8%
Vacated or withdrawn
2 · 15%
15%
Penalty reduction in decided contests
$1K proposed, $1K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2016-09-06.
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: 2025-06-04
0%
of limit-tested samples over the exposure limit
26
samples
6
limit-tested
Most sampled contaminants
Respirable dust, <.1mg19
Nuisance dust, respirable, <1% Qtz5
Quartz, respirable, >1% Qtz1
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (26)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-06-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-06-04
Quartz, respirable, >1% Qtz
0.34
0.76
0.45
Belt Crew
2025-06-04
Respirable dust, <.1mg
0
Washer Operator
2025-06-04
Respirable dust, <.1mg
0
Front-end Loader Operator
2024-05-09
Respirable dust, <.1mg
0
Cleanup Man
2024-05-09
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2024-05-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-04-07
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-04-07
Respirable dust, <.1mg
0
Washer Operator
2022-04-07
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-05-05
Respirable dust, <.1mg
0
Mechanic
2021-05-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-05-05
Respirable dust, <.1mg
0
Clam Shell Operator
2021-05-05
Respirable dust, <.1mg
0
Crusher Oper/Worker
2021-05-05
Respirable dust, <.1mg
0
Utility Man
2016-11-22
Respirable dust, <.1mg
0
Front-end Loader Operator
2016-11-22
Respirable dust, <.1mg
0
Crusher Oper/Worker
2016-11-22
Unlisted Particulate, respirable, <1% Qtz
0.22
Clam Shell Operator
2006-02-23
Nuisance dust, respirable, <1% Qtz
0.18
10
0.02
Utility Man
2006-02-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-09-23
Nuisance dust, respirable, <1% Qtz
0.17
10
0.02
Front-end Loader Operator
2003-09-23
Nuisance dust, respirable, <1% Qtz
0.45
10
0.05
Washer Operator
2001-11-08
Respirable dust, <.1mg
0
Front-end Loader Operator
2001-11-08
Nuisance dust, respirable, <1% Qtz
0.46
10
0.05
Crusher Oper/Worker
2001-08-01
Nuisance dust, respirable, <1% Qtz
0.18
10
0.02
Front-end Loader Operator
2001-08-01
Respirable dust, <.1mg
0
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.
PLANT #1 recorded 23.65 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.
23.65
total case rate
7.88
days-away rate
0.000
fatality rate
Above 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 Kentucky, metal and nonmetal mining averaged 2.17 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 *
23.65
7.88
0.000
2024 *
19.44
0.00
0.000
2023 *
9.36
9.36
0.000
2021 *
0.00
0.00
0.000
2003 *
0.00
0.00
0.000
2002 *
0.00
0.00
0.000
2001 *
0.00
0.00
0.000
2000 *
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
10
2025
10
2024
9
2023
12
2022
10
2021
13
2020
9
2019
11
2018
8
2017
7
2016
5
2015
5
2014
4
2013
4
2012
4
2011
6
2010
5
2009
5
2008
7
2007
10
2006
10
2005
9
2004
8
2003
8
2002
8
2001
10
2000
10
Source: MSHA quarterly employment and production, updated weekly.
PLANT #1 sits in Boone County, Kentucky, where the Census mining category is 0.2% 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.
Boone County, Kentucky · Population 137,676
0.2%
Mining share of county employment
$94,752
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
The employee was attempting to avoid being stung by a bee and hastily exited from a catwalk down the stairs. EE missed one tread and landed awkwardly causing knee pain. EE denied medical treatment. On Monday 6/23/2025 the employee did notify management that EE would seek medical treatment.
January 31, 2025KY · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanOTHER
Employee was laying on ground for maintenance on wash plant. When employee was getting up off the ground they felt discomfort in their left knee when standing up straight.
January 16, 2025KY · Metal/Non-Metalgroundman, yardmanMACHINERY
Employee was holding the grinder in one hand. Employee was looking at the screen and the grinder had drifted down touched the screen and then skipped over cutting through employee's glove.
2024 · 2 incidents
August 9, 2024KY · Metal/Non-Metalbarge/boat/dredge/towbarge/towboat/leach operator, riverman, deck handMACHINERY
Employees were putting on the hoist cables for the dredge bucket while pulling cable up. Employee was feeding the cable over the drum to other employees. The cable had pinched employee's hand/finger into the hoist drum cutting through the gloves and cutting their right index finger.
July 31, 2024KY · Metal/Non-Metalbarge/boat/dredge/towbarge/towboat/leach operator, riverman, deck handHANDLING OF MATERIALS
Employee was removing cable clips between a 40 mm and 3/4 cable the 3/4 cable was broke and was frayed {had cable wires sticking out} while removing cable clips it allowed the 3/4 cable to slide down and cut their wrist.
2023 · 1 incident
October 3, 2023KY · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
Individual was cleaning a catwalk by oversized collector on plant# 2. When EE stood back up, EE stepped on a rock and rolled ankle falling to the ground. Sought medical treatment and therapy on own. Reported occupational injury on 2/6/24. Had therapy and requires surgery on 5/29/24. Will have restrictions post surgery.
2018 · 1 incident
January 8, 2018KY · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
A piece of steel with a lifting eye welded on top of it was sitting in the upright position for lifting. The employee attempted to lay the piece of steel over to keep it from possibly falling over and mashing someone's foot. When EE did this the glove became caught on the lifting lug and EE was unable to get hand away.
2016 · 1 incident
September 7, 2016KY · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
At quitting time the employee was exiting EE's service vehicle and twisted EE's left ankle and fell to the ground.
2008 · 1 incident
January 2, 2008KY · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Miner was conducting crusher maintenance - moving a piece of the crusher to a different location - while setting the piece down, crushed left ring fingertip.
1999 · 1 incident
August 2, 1999KY · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS WELDING IN A CRUSHER. A HELPER HANDED HIM A PIECE OF STEEL. IT SLIPPED OUT OF HIS HAND AND HE MOVED SUDDENLY TO AVOID THE STEEL. ATTHE TIME, HE DID NOT NOTICE A PROBLEM, BUT THE N EXT MORNING, HE COULD NOT GET OUT OF BED.
1996 · 1 incident
February 23, 1996KY · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
WHILE REPLACIGN V-BELTS ON DRIVE FOR WATER PUMP MAINTENANCE PERSONNEL ATTEMPTED TO TAKE WEIGHT OFF OF DRIVE PULLEY WITH PRY BAR UNDER MTOOR BASE AND DID NOT USE PROPER LIFTING TECHNIQUES AND I NJRUED LOWER BACK.
October 2, 1993KY · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
EMPLOYEE WAS CUTTING SOME CONVEYOR FRAME TO BE RE-USED WHEN THE PIECE HE WAS CUTTING FELL LOOSE & STRUCK HIM BEHIND THE STEEL TOE OF HIS BOOT. THE INJURY WAS A HAIR LINE FRACTURE TO HIS LEFT F OOT BEHIND THE TOE AREA.
1991 · 1 incident
July 1, 1991KY · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
OPERATOR WAS CH9CKING ON PROBLEM WITH THE JAW CRUSHER AND GRIZZLIE FEEDER. AFTER INSPECTION, OPERATOR JUMPED TO GROUND. RING ON THIRD FINGER OF LEFT HAND CAUGHT ON HAND RAIL CAUSING THE FINGER TO BE TORN FRO4 HAND.
Related mines
Other mines operated by Northern Kentucky Aggregates Inc