Mining Incidents

G3 Enterprises Byron Plant Metal/Non-Metal

Controlled by Tom Cook
Byron, Contra Costa County, CA  ·  Active
MSHA Mine ID: 0401949

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Fatalities
0
Total incidents
18
Years on record
2002–2026
Latest incident
May 2026
Compliance record
MSHA citations since 2000
259
citations
60
significant & substantial
$96,019
proposed penalties
$89,884
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 8,863 3 0 338.5
2025 Q3 723 6 2 8298.8
2025 Q1 9,235 0 0 0.0
2024 Q4 9,745 6 0 615.7
2024 Q3 459 10 0 21786.5
2024 Q2 9,545 0 0 0.0
2024 Q1 10,792 9 1 834.0
2023 Q2 9,969 5 0 501.6
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

18 on file

2026 · 2 incidents

May 13, 2026 CA · Metal/Non-Metal miner, prospector, nec OTHER
G3 Enterprises, Inc. · Struck by... (Not Elsewhere Classified)

The operator was accessing the cab of a CAT 633D Scraper. With the door open, the operator began to enter the cab when a gust of wind caused the cab door to close. The door impacted the operators back. More than 2 hours later, the operator reported EE felt some pain in EE's groin region.

February 27, 2026 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
G3 Enterprises, Inc. · Over-exertion (Not Elsewhere Classified)

Employee was utilizing a 12# sledgehammer to tighten a hammer union seal. Employee struck seal 2-3 times and then experienced pain in EE's right forearm and bicep.

2025 · 1 incident

October 6, 2025 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
G3 Enterprises, Inc. · Fall from machine

Employee was on platform of 980 wheel loader cleaning the front window when EE slipped and lost EE's grip on the hand-hold. EE fell over the side, hitting the wheel well and then to ground. The wiper dispenser wasn't working well. The platform footing may have had dew causing the slip but not identified at time of inspection. Employee later complained that EE's back was sore.

2023 · 1 incident

October 11, 2023 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POISONING (TOXIC MATERIALS)
G3 Enterprises, Inc. · Inhalation of radiations, caustics, toxic and noxious substances

A slow leak of a reagent tote spilled to ground while the plant was closed. The vapors/fumes were blown in the direction of the operator by the wind which was inhaled by the operator and upset EE's stomach. Later, the operator felt additional symptoms (headache, nausea) and vomited. Diagnosis was chemical inhalation irritation.

2022 · 1 incident

July 30, 2022 CA · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
G3 Enterprises, Inc. · Over-exertion in lifting objects

Employee was setting up a 10" by 8' plastic pipe (35-40 lbs.) under a loadout bin. As they started to lift the pipe, the felt a pain in right shoulder and set the pipe back down. Employee stated they didn't lift the pipe from the end and walk to a near vertical position as was common, but attempted to lift the pipe from the bottom 1/3 of length on opposite end. Reported 8/15/22.

2021 · 1 incident

April 13, 2021 CA · Metal/Non-Metal dryer operator, kiln operator, dry plant operator, fluid operator, bed dryer operator SLIP OR FALL OF PERSON
G3 Enterprises, Inc. · Fall onto or against objects

The employee was attempting to access the cab of the Case skid steer. On EE's approach, EE tripped on the edge of the bucket and stumbled/fell into the bucket and struck EE's right thigh and forearm on the bucket.

2018 · 1 incident

January 2, 2018 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
G3 Enterprises, Inc. · Struck by... (Not Elsewhere Classified)

Injured worker was holding an 8" bolt in left hand while another worker was striking head of bolt with a sledge. During a strike, the sledge missed bolt head and struck the injured workers left hand causing a fracture to the tip of employee's left ring finger.

2017 · 1 incident

June 26, 2017 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
G3 Enterprises, Inc. · Over-exertion (Not Elsewhere Classified)

The worker was walking down a slight incline on a hillside while inspecting a fenceline at an area away from all mining activity. While in stride, employee's lead foot (right) slipped on dry grass. As momentum carried employee forward, back foot caught on something and stayed in place causing a sprained left ankle.

2016 · 2 incidents

June 17, 2016 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
G3 Enterprises, Inc. · Fall from machine

Driver felt foggy and disoriented when truck finished being loaded. As EE drove away, felt hot and uncomfortable and stopped to get out for fresh air. As EE exited the truck feeling disoriented, stumbled from the step and fell to ground. A doctor said that dehydration and drop in blood pressure caused the disorientation resulting in the fall to ground and injury.

February 3, 2016 CA · Metal/Non-Metal mine manager, mine foreman, mine owner OTHER
G3 Enterprises, Inc. · (Not Elsewhere Classified)

Plant Manager was in office when EE experienced chest pain. Weigh master called 911. Plant Manager was taken by ambulance to local hospital. Plant Manager never lost consciousness or needed CPR. Plant Manager underwent angioplasty procedure and received (2) stents to open artery blockages. Plant Manager was admitted to hospital and had overnight stay.

2015 · 1 incident

October 28, 2015 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
G3 Enterprises, Inc. · Struck by... (Not Elsewhere Classified)

The worker saw what he believed to be a piece of slag on a steel support. While using a 4 lb sledge hammer to position an I-beam between 2 supports, he made contact with the side of one of the supports while hammering in the downward position. The area where he noticed slag was in fact a sharp edge in which he made contact with. Worker was wearing gloves at time of incident.

2014 · 1 incident

August 5, 2014 CA · Metal/Non-Metal dry screening plant operator, screen house operator HANDLING OF MATERIALS
G3 Enterprises, Inc. · Struck by... (Not Elsewhere Classified)

The operator opened a screen door in the screen house and as he was brushing the screen with a long-handled brush heard a loud noise and the screen door then dropped onto his right arm causing a contusion. The cable that is attached to the screen door to assist in opening the door broke from the counterweight causing the door to drop.

2011 · 1 incident

2006 · 1 incident

April 19, 2006 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Unimin Corporation · Over-exertion (Not Elsewhere Classified)

Climbing ladder to do maintenance on screen on our extec screen machine. He said he slipped and grabbed on to the hand rail. He came back to work for next day we requested a doctor visit before returning. He returned on 4/25/06, 4/26/06 and 4/27/06. Then went to a chiropactor and was told to stay off work until futher notice.

2004 · 1 incident

April 4, 2004 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Unimin Corporation · Fall onto or against objects

Ee began to lose his balance, coming down some stairs in screen house, between #2 & #3 screens. To regain balance, he grabbed the sides of the screens. In doing so, he jabbed his left thumb into a blunt edge of a piece of rectangular steel on #3 screen. Upon initial consultation ee thought he didn't need medical attention. After continued tenderness he was sent to comp dr 4/16.

2003 · 1 incident

February 14, 2003 CA · Metal/Non-Metal dryer operator, kiln operator, dry plant operator, fluid operator, bed dryer operator HANDLING OF MATERIALS
Unimin Corporation · Caught in, under or between a moving and a stationary object

EE WAS HELPING A MAINT MAN CHANGE A SCRAPER CUTTING EDGE. THE JACK USED TO LIFT THE EDGE DID NOT RAISE HIGH ENOUGH TO LINE UP BOLT HOLES. EE USED 4 BY 4 PIECE OF WOOD AND PLACED IT ON HE JACK STAND, THAN PLACED THE CUTTING EDGE ON TOP OF IT. BECAUSE THE EDGE/ WOOD WAS NOT SECURED OR CONTROLLED, IT SLIPPED AND SHIFTED CATCHING THE EE'SFOREARM BETWEEN CUTTING EDGE AND PADDLE.

2002 · 2 incidents

July 11, 2002 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Unimin Corporation · Over-exertion (Not Elsewhere Classified)

EE CLAIMED THAT HE TRIPPED OVER A PUMP SUPPORT STAND, AN AREA THAT IS NOT A WALKWAY WHILE INSPECTING A SUMP. AS HE CAME DOWN OFF THE PAD, HE LANDED ON HIS KNEE IN AN AWKWARD POSITION AND TWIST ED IT. EE CONTINUED WORK NEXT 2 WEEKS WITHOUT NOTIFICATION TO EMPLOYER. ON 7-19-02 EE RAN TO TURN ON/OFF A PUMP & WHILE RUNNING FELT A POP IN HIS KNEE. IT WAS LATER DETERMINE TO BE A SPRAINED

April 5, 2002 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Unimin Corporation · Contact with hot objects or substances

EE WAS ON A LADDER CUTTING BOLTS FROM BETWEEN 2 FLANGES ON A WATER LINE. ANOTHER EE IN THE AREA WAS TALKING TO HIM, WHEN HE TURNED TO SEE WHAT THEY WANTED, HE ACCIDENTLY MOVED THE TORCH ACROSS HIS LEFT FOREARM. EE WAS BARE-ARMED AND NOT WEARING ANY PROTECTIVE ARM COVERUINGS.