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Crusher #4 Metal/Non-Metal

JTL GROUP,INC. · Surface

Controlled by Knife River Corporation

Casper, Natrona County, WY · Intermittent

MSHA Mine ID: 4801569

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Email me when a new MSHA incident is filed at Crusher #4.

Fatalities: 0
Total incidents: 2
Years on record: 2010–2016
Latest incident: Jul 2016

Compliance record

MSHA citations since 2008

citations

significant & substantial

$3,100

proposed penalties

$3,100

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Per 1M hrs
2025 Q4	649	0.0
2025 Q3	1,031	0.0
2025 Q2	397	0.0
2025 Q1	0
2024 Q4	439	0.0
2024 Q3	364	0.0
2024 Q2	95	0.0
2024 Q1	232	0.0

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

Reportable incidents

2 on file

2016 · 1 incident

July 20, 2016 WY · Metal/Non-Metal outside foreman, leadman SLIP OR FALL OF PERSON

McMurry Ready Mix · Fall from ladders

IE was working off of ladder trying to put a pin in a belt, when IE fell off the ladder. Injured worker estimates IE fell 6 feet. Nearby worker said EE looked over and IE was standing on the top rung of ladder, EE went to put what was in hands down to go help and when EE looked back up IE had fell off the ladder. Ladder measured 7 1/2 feet.

2010 · 1 incident

July 27, 2010 WY · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer NONPOWERED HAULAGE

McMurry Ready Mix · Struck by... (Not Elsewhere Classified)

Miner was walking backwards while pulling a wheeled oxy-acetelyne welding cart on soft/sandy ground. The cart wheels hung up in a soft spot. The momentum of the cart caused a bottle regulator to strike the miner in the chest as the miner continued to pull the cart. A bruised sternum resulted.