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COWBOY CLIFF QUARRY Metal/Non-Metal

Montana Frontier SandStone LLC · Surface

Controlled by Bruce Barth; Marie Barth

RYEGATE, Golden Valley County, MT · Temporarily Idled

MSHA Mine ID: 2402733

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Fatalities: 0
Total incidents: 2
Years on record: 2018
Latest incident: Nov 2018

Compliance record

MSHA citations since 2019

citations

significant & substantial

$777

proposed penalties

$777

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	0
2025 Q3	0
2025 Q2	0
2025 Q1	0
2024 Q4	0
2024 Q3	105	0.0
2024 Q2	0
2024 Q1	100	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

2018 · 2 incidents

November 20, 2018 MT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE

Montana Frontier SandStone LLC · Struck against a moving object

While dumping contents in dump truck the truck tipped over and ee bumped head.

October 22, 2018 MT · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)

Montana Frontier SandStone LLC · Struck by falling object

As EE was chiseling a slab, a large sheet came off the back and bounced up hitting the slab, tipping it toward EE. EE wasn't able to escape fast enough. The slab landed on EE's ankle and foot at a sideways angle.