← Back to search

Riverside Operation Metal/Non-Metal

Riverside Milling Company, LLC · Facility

Controlled by P W Gillibrand Company Inc

Riverside, Riverside County, CA · Active

MSHA Mine ID: 0404263

Watch this mine

Email me when a new MSHA incident is filed at Riverside Operation.

Fatalities: 0
Total incidents: 3
Years on record: 2011–2026
Latest incident: Mar 2026

Compliance record

MSHA citations since 2000

citations

significant & substantial

$4,351

proposed penalties

$4,351

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	308	0	0	0.0
2025 Q3	1,469	0	0	0.0
2025 Q2	328	0	0	0.0
2025 Q1	1,692	0	0	0.0
2024 Q4	280	0	0	0.0
2024 Q3	235	0	0	0.0
2024 Q2	1,661	0	0	0.0
2024 Q1	334	0	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

3 on file

2026 · 1 incident

March 19, 2026 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS

Riverside Milling Company, LLC · Struck against stationary object

The employee was welding a portable hopper in the warehouse and took off their welding helmet to grind. They put on their face shield but not their hard hat and after grinding, stood up, striking their head on the leg stand of the hopper cutting their forehead.

2011 · 2 incidents

September 14, 2011 CA · Metal/Non-Metal ledgeman/hand, quarry man DUST DISEASE OF LUNGS

Premier Silica LLC · Inhalation of radiations, caustics, toxic and noxious substances

On the above date the miner was confirmed to have silicosis by medical professional.

February 7, 2011 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)

Premier Silica LLC · Fall onto or against objects

On 3/28/2011, employee reported to his supervisor that he had an accident on 2/7/2011. Employee stated that he fell against hand rail while trying to loosen bin indicator with tool/cheater bar. Employee stated that he injured right shoulder when he fell against handrail. Accident under investigation at this time with insurance carrier.