Mining Incidents

Blue Mountain Minerals PR LLC Metal/Non-Metal

Controlled by Portola Minerals Company
Paso Robles, San Luis Obispo County, CA  ·  Active
MSHA Mine ID: 0400099

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Fatalities
0
Total incidents
10
Years on record
2009–2026
Latest incident
Jan 2026
Compliance record
MSHA citations since 2000
256
citations
84
significant & substantial
$185,935
proposed penalties
$146,058
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 7,354 0 0 0.0
2025 Q3 7,178 1 0 139.3
2025 Q2 7,081 0 0 0.0
2025 Q1 5,909 0 0 0.0
2024 Q4 7,067 1 0 141.5
2024 Q3 5,875 3 1 510.6
2024 Q2 1,097 0 0 0.0
2024 Q1 620 2 0 3225.8
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

10 on file

2026 · 1 incident

January 28, 2026 CA · Metal/Non-Metal plumber, pipefitter, millwright HANDLING OF MATERIALS
Blue Mountain Minerals PR LLC · Fall to the walkway or working surface

Miner clocked in from lunch and was using their phone while walking. There was a wheel chock out in open space that led to them tripping and the miner fell. The fall then apparently caused a fracture to the proximal end of the radius bone in the left arm.

2024 · 1 incident

May 31, 2024 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Blue Mountain Minerals PR LLC · Fall to the walkway or working surface

Miner was speed walking from one piece of equipment to another and tripped on a rock and fell, striking left knee and causing a laceration that required medical treatment.

2021 · 2 incidents

November 8, 2021 CA · Metal/Non-Metal grader operator, roadgrader operator POWERED HAULAGE
Blue Mountain Minerals PR LLC · Fall from machine

Miner was operating a CAT 12G grader on an incline, the engine stalled during operation. The miner removed seat belt and jumped off the piece of equipment. They landed on their feet but then slipped onto their buttocks thereby injuring their back.

March 24, 2021 CA · Metal/Non-Metal plumber, pipefitter, millwright HANDTOOLS (NONPOWERED)
Blue Mountain Minerals PR LLC · Struck by... (Not Elsewhere Classified)

Employee was cutting belting used to guard a conveyor with a box cutter knife. The knife slipped and EE lacerated EE's right hand.

2014 · 3 incidents

November 6, 2014 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Lime Mountain Company · Over-exertion (Not Elsewhere Classified)

Employee was tightening bolts on the Mill at our Screen Stone Plant when he felt a pain in his groin area.

November 2, 2014 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Lime Mountain Company · Fall to the walkway or working surface

Employee was responding to a fire at Screen Stone, he jumped out of the truck and grabbed two fire extinguishers, as he ran to the stairs he slipped in the mud and landed on his butt and back. Incident was not reported until 11/06/2014 because at the time he felt no injury.

March 12, 2014 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Lime Mountain Company · Over-exertion in lifting objects

Large rock fell onto the haul truck, employee tried to lift rock off by himself.

2013 · 1 incident

June 5, 2013 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Lime Mountain Company · Fall onto or against objects

Employee was sorting through a box of paperwork when a piece of paper fell on the ground the employee bent over to pick it up and his back went out causing him to fall forward and hit his head on the door. Employee was sent to the doctor for evaluation. No damage or impairment was caused.

2012 · 1 incident

September 20, 2012 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Lime Mountain Company · Bodily reaction, (Not Elsewhere Classified)

Working on a drain pipe and a swarm of bees erupted. Person was swinging his arms to keep the bees away and heard a loud pop in his shoulder. This person has been put on light duty due to both injuries

2009 · 1 incident

July 27, 2009 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Lime Mountain Company · Over-exertion (Not Elsewhere Classified)

Employee bent down to turn on water valve located approximately one foot from the ground. Twisted or tweaked his back in the process. EE is currently off work pending further medical evaluation and release from multiple doctors restrictions.