Mining Incidents

ANTONIA (CS56) Metal/Non-Metal

Controlled by Riverstone Group
Antonia, Jefferson County, MO  ·  Active
MSHA Mine ID: 2301957

ANTONIA (CS56) has $7K in proposed MSHA penalties and $358 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
20
Years on record
1989–2023
Latest incident
Mar 2023
Compliance record
MSHA citations since 2000
56
citations
5
significant & substantial
$6,582
proposed penalties
$6,224
paid to date
95% of proposed penalties paid to date, a $358 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
67
inspections on record
914
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: 914 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

ANTONIA (CS56) has $7K in proposed MSHA penalties and $358 outstanding across 1 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.
$7K
proposed penalties
$7K
current assessed
$6K
paid to date
$358
outstanding
55 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-05-27.
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 5,351 0 0 0.0
2025 Q3 4,863 0 0 0.0
2025 Q2 6,346 1 0 157.6
2025 Q1 5,380 1 0 185.9
2024 Q4 5,460 0 0 0.0
2024 Q3 5,924 0 0 0.0
2024 Q2 6,261 1 0 159.7
2024 Q1 5,524 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 5,286 3 0 567.5
2023 Q3 5,330 1 0 187.6
2023 Q2 6,138 0 0 0.0
2023 Q1 5,684 2 0 351.9
2022 Q4 4,572 0 0 0.0
2022 Q3 5,763 0 0 0.0
2022 Q2 5,878 0 0 0.0
2022 Q1 5,558 0 0 0.0
2021 Q4 5,451 1 0 183.5
2021 Q3 6,906 0 0 0.0
2021 Q2 6,864 0 0 0.0
2021 Q1 6,203 0 0 0.0
2020 Q4 6,070 1 0 164.7
2020 Q3 6,267 0 0 0.0
2020 Q2 6,131 1 0 163.1
2020 Q1 6,247 1 0 160.1
2019 Q4 5,539 0 0 0.0
2019 Q3 5,903 0 0 0.0
2019 Q2 6,102 2 0 327.8
2019 Q1 5,529 0 0 0.0
2018 Q4 5,369 1 0 186.3
2018 Q3 6,039 1 0 165.6
2018 Q2 6,180 0 0 0.0
2018 Q1 5,590 6 2 1073.3
2017 Q4 5,157 0 0 0.0
2017 Q3 5,657 2 0 353.5
2017 Q2 5,447 0 0 0.0
2017 Q1 3,790 1 0 263.9
2016 Q4 6,320 0 0 0.0
2016 Q3 5,665 0 0 0.0
2016 Q2 4,631 0 0 0.0
2016 Q1 4,742 0 0 0.0
2015 Q4 4,465 0 0 0.0
2015 Q3 6,024 0 0 0.0
2015 Q2 4,913 0 0 0.0
2015 Q1 3,128 1 0 319.7
2014 Q4 4,447 0 0 0.0
2014 Q3 4,747 1 0 210.7
2014 Q2 2,782 0 0 0.0
2014 Q1 2,707 2 0 738.8
2013 Q4 4,129 0 0 0.0
2013 Q3 5,444 0 0 0.0
2013 Q2 4,245 1 0 235.6
2013 Q1 2,574 0 0 0.0
2012 Q4 3,256 0 0 0.0
2012 Q3 4,509 0 0 0.0
2012 Q2 4,563 0 0 0.0
2012 Q1 2,600 0 0 0.0
2011 Q4 4,116 1 0 243.0
2011 Q3 4,653 3 1 644.7
2011 Q2 4,223 0 0 0.0
2011 Q1 2,898 0 0 0.0
2010 Q4 4,530 0 0 0.0
2010 Q3 4,698 0 0 0.0
2010 Q2 4,597 2 0 435.1
2010 Q1 3,158 0 0 0.0
2009 Q4 4,921 0 0 0.0
2009 Q3 3,931 2 0 508.8
2009 Q2 6,075 0 0 0.0
2009 Q1 3,958 0 0 0.0
2008 Q4 5,775 0 0 0.0
2008 Q3 6,068 0 0 0.0
2008 Q2 6,350 2 0 315.0
2008 Q1 4,774 0 0 0.0
2007 Q4 5,687 0 0 0.0
2007 Q3 6,664 0 0 0.0
2007 Q2 7,220 0 0 0.0
2007 Q1 5,152 0 0 0.0
2006 Q4 6,738 0 0 0.0
2006 Q3 7,355 0 0 0.0
2006 Q2 7,673 0 0 0.0
2006 Q1 7,556 0 0 0.0
2005 Q4 7,446 0 0 0.0
2005 Q3 7,256 0 0 0.0
2005 Q2 6,859 0 0 0.0
2005 Q1 7,136 0 0 0.0
2004 Q4 6,551 0 0 0.0
2004 Q3 4,081 0 0 0.0
2004 Q2 5,564 0 0 0.0
2004 Q1 5,634 0 0 0.0
2003 Q4 5,855 0 0 0.0
2003 Q3 7,152 0 0 0.0
2003 Q2 8,982 0 0 0.0
2003 Q1 7,973 0 0 0.0
2002 Q4 7,838 0 0 0.0
2002 Q3 10,570 4 0 378.4
2002 Q2 9,888 0 0 0.0
2002 Q1 7,999 2 0 250.0
2001 Q4 13,469 0 0 0.0
2001 Q3 13,424 0 0 0.0
2001 Q2 18,749 0 0 0.0
2001 Q1 8,018 5 1 623.6
2000 Q4 17,485 0 0 0.0
2000 Q3 26,626 3 1 112.7
2000 Q2 20,597 0 0 0.0
2000 Q1 15,787 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

20 on file

2023 · 1 incident

March 15, 2023 MO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Central Stone Company · Caught in, under or between a moving and a stationary object

Employee alleges EE was removing a belt from the primary crusher and EE smashed EE's left thumb. EE has to wear a splint while working.

2022 · 1 incident

January 24, 2022 MO · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Central Stone Company · Over-exertion in lifting objects

Employee alleges was lifting a hydraulic pump and felt pain in employee's back.

2020 · 1 incident

September 3, 2020 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Central Stone Company · Fall onto or against objects

Employee alleges they slipped on some concrete block and they went to grab a piece of metal and they cut the palm of right hand. EE had to get 9 stitches.

2013 · 1 incident

April 11, 2013 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver STEPPING OR KNEELING ON OBJECT
Central Stone Company · Struck against stationary object

Employee alleges he was clearing rock from skirting and he went to see if the tail pulley was cleared and as he took a step back his knee went out.

2011 · 1 incident

August 17, 2011 MO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Central Stone Company · Struck against stationary object

Employee alleges he was taking apart a piece of equipment and a metal side fell and hit the basket on the man lift. The man lift jerked and caused him to hit his face on the handrail and caused a fracture to his face.

2010 · 1 incident

August 16, 2010 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
Central Stone Company · Struck by flying object

Employee alleges he was loading a haul truck and the wind blew something in his left eye. He received medical treatment to his eye.

2008 · 1 incident

March 19, 2008 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Central Stone Company · Flash burns (welding)

Employee alleges he and another co-worker were welding at the same time. The next morning eyes were burning and he couldn't open them.

2005 · 1 incident

October 10, 2005 MO · Metal/Non-Metal drill operator MACHINERY
Central Stone Company · Fall from machine

Employee alleges he was drilling a hole, the drill slid down and he rolled out of the cab onto his back.

2004 · 2 incidents

March 12, 2004 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Central Stone Company · Struck by... (Not Elsewhere Classified)

Employee alleges he was cutting a belt guard with a razor knife and it slipped and cut his wrist. He received stitches

2003 · 1 incident

March 8, 2003 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Central Stone Company · Over-exertion in lifting objects

EE ALLEGES HE WAS KNEELING TO PICK UP A WRENCH & HE FELT A POP IN HIS RT. KNEE.

1997 · 2 incidents

May 27, 1997 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Bellefontaine Quarry Inc · Struck by falling object

DROPPED STEEL COUPLING ON FINGER ON RIGHT HAND.

1996 · 1 incident

January 31, 1996 MO · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Bellefontaine Quarry Inc · Struck against stationary object

WHILE JUMP-STARTING DUMP TRUCK, EMPLOYEE STEPPED OFF HI-LIFT ONTO DUMP TRUCK AND HIT HEAD ON CAB SHIELD OF DUMP TRUCK.

1990 · 1 incident

April 13, 1990 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Bellefontaine Quarry Inc · Over-exertion (Not Elsewhere Classified)

EMPLOYEE WAS SHOVELING ROCK FROM AROUND CONVEYOR FOR 1 1/2 TO 2 HOURS. STRAINED HIS LOWER BACK-UNKNOWN.

1989 · 5 incidents

November 16, 1989 MO · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator STRIKING OR BUMPING
Bellefontaine Quarry Inc · Struck against stationary object

IN WALKING BETWEEN NO SMOKING SIGN & WASTE OIL TANK EMPL STOOPED TO AVOID HITTING HREAD ON SIGN BUT DID NOT STOOP LOW ENOUGH & CUT HEAD.

August 23, 1989 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Bellefontaine Quarry Inc · Absorption of radiations, caustics, toxic and noxious substances

STUNG BY BEE OR INSECT CAUSING LEFT HAND TO SWELL.

July 26, 1989 MO · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Bellefontaine Quarry Inc · Struck by... (Not Elsewhere Classified)

WHILE CUTTING A BOARD WITH A HAND HELD POWER SAW, THE SAW SLIPPED AND CUT EE LEFT INDEX FINGER.

July 5, 1989 MO · Metal/Non-Metal drill operator SLIP OR FALL OF PERSON
Bellefontaine Quarry Inc · Fall from machine

IN STEPPING OFF THE STEP WHICH IS REQUIRED TO REACH THE CONTROLS ON THE DRILL EMPL INJURED LOWER BACK THE STEP IS ABOUT 2 FEET IN DEPTH EMPL INJURED LOWER BACK

February 23, 1989 MO · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Bellefontaine Quarry Inc · Over-exertion (Not Elsewhere Classified)

IN ATTEMPTING TO LOOSEN ROCK IN THE BINS, EMPLOYEE LOST HIS FOOTING AND TWISTED HIS RIGHT KNEE.

For insurers, brokers, and safety consultants

The full compliance file on ANTONIA (CS56)

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.