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TRP Table Mountain Plant Metal/Non-Metal

Triangle Rock Products · Surface

Controlled by Vulcan Materials Company

colusa, Butte County, CA · Active

MSHA Mine ID: 0404847

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Email me when a new MSHA incident is filed at TRP Table Mountain Plant.

Fatalities: 0
Total incidents: 9
Years on record: 2000–2019
Latest incident: Oct 2019

Compliance record

MSHA citations since 2000

citations

significant & substantial

$8,691

proposed penalties

$8,641

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	Per 1M hrs
2025 Q4	7,522	1	132.9
2025 Q1	5,498	0	0.0
2024 Q4	7,123	0	0.0
2024 Q3	1,558	0	0.0
2024 Q2	1,884	0	0.0
2023 Q4	2,879	0	0.0
2023 Q3	7,974	0	0.0
2023 Q1	4,047	0	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

9 on file

2019 · 1 incident

October 8, 2019 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON

Triangle Rock Products · Fall from machine

On 10/8/19, the employee was descending excavator when EE's left knee buckled and EE fell to the ground. The employee was treated at the Company clinic where EE was diagnosed with a left knee sprain and a right shoulder strain, placed on restricted duty, and prescribed physical therapy

2017 · 1 incident

October 8, 2017 CA · Metal/Non-Metal FIRE

Triangle Rock Products · Accident type, without injuries

A wild fire blew through the mine. The fire started off site and because of strong winds quickly engulfed areas such as the bone yard and timber by the rail. There were a few plant supplies and 80 plus ties lost due to the fire.

2007 · 1 incident

July 20, 2007 CA · Metal/Non-Metal drill operator MACHINERY

Martin Marietta Materials · Caught in, under or between running or meshing objects

The chain on drill mast was broken (it was wedged into the top sprocket). When pried loose it pulled his glove into the chain and the sprocket, pinching his right hand, thus requiring 17 stitches.

2006 · 1 incident

June 15, 2006 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY

Martin Marietta Materials · Struck by... (Not Elsewhere Classified)

replacing a tension rod on jaw crusher. He was on the under belt with restricted mobility. While tightening the bolt with an impact wrench and backing up the nut with a box end wrench, his hand slipped off back up wrench. The impact was still engaged and spun the box end wrench striking him just below the lower lip.

2003 · 2 incidents

September 30, 2003 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY

Meridian Aggregates Company Lp · Struck by... (Not Elsewhere Classified)

GRINDING ON LOADER BUCKET. WAS WEARING SAFETY GLASSES AND FACE SHIELD. FLIPPED UP FACE SHIELD AFTER STOPPED GRINDING AND DEBRIS FELL IN EYE.

March 19, 2003 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS

Meridian Aggregates Company Lp · Over-exertion (Not Elsewhere Classified)

KNOCKING ROCK OUT OF A TAIL PULLEY, NOT ENOUGH ROOM TO KEEP BODY IN COMFORTABLE WORKING CONDITION.

2002 · 2 incidents

August 23, 2002 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS

Meridian Aggregates Company Lp · Over-exertion in lifting objects

LIFTING ACCUMALATOR BACK UP INTO PLACE.

June 14, 2002 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON

Meridian Aggregates Company Lp · Fall onto or against objects

EE WAS WORKING ON CHUTE, WHILE CLIMBING DOWN, HECAUGHT HIS SLEEVE OF HIS OVERALLS ON THE CHUTE, CAUSING HIM TO SPIN AROUND HITTING HIS RIBS.

2000 · 1 incident

May 18, 2000 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)

Meridian Aggregates Company · Struck by... (Not Elsewhere Classified)

CUTTING BELTING MATERIAL W/RAZOR KNIFE--KNIFE SLIPPED, CUTTING EMPLOYEE ON RIGHT THIGH.