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Superior Silica Sands LLC operator

Controlled by PIMCO; HPS Investment Partners; Oak Hill Advisors

MSHA operator ID: 0092166

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Email me when a new MSHA incident is filed at any Superior Silica Sands LLC mine.

Fatalities: 2
Total incidents: 38
Mines on record: 8
Years on record: 2010–2025

Compliance record

MSHA citations since 2009

514

citations

141

significant & substantial

$350,914

proposed penalties

$330,241

paid to date

Source: MSHA violations data, updated weekly.

Top causes

SLIP OR FALL OF PERSON 1 fatality · 7 non-fatal
NONPOWERED HAULAGE 1 fatality
HANDLING OF MATERIALS 15 non-fatal
MACHINERY 5 non-fatal
OTHER 4 non-fatal
POWERED HAULAGE 2 non-fatal

Incident timeline

2025

2024

2023

1 (1f)

2022

2021

2020

2019

2018

9 (1f)

2017

2015

2013

2012

2010

Mines on record

Big Oak Plant TX
Dry Plant WI
Superior Silica Sands Church Road Mine WI
Kosse Mine TX
Clinton Dry Plant WI
Thompson Hills WI
Arland Dry Plant WI
Superior Silica Sands LLC FLS Mine/Wet Plant WI

Fatalities under this operator

2 recorded

August 5, 2023 TX · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · SLIP OR FALL OF PERSON

Superior Silica Sands LLC · Fall from machine

Improper procedure performed, improper PPE, and not following SOP. *A customer truck driver fell from a large container mounted on the trailer of the truck while descending the container. The customer truck driver died from the injuries on August 7, 2023.

June 23, 2018 TX · Metal/Non-Metal electrician, lineman Fatality · NONPOWERED HAULAGE

Superior Silica Sands LLC · Caught in, under or between a moving and a stationary object

On June 23, 2018 at approximately 9:20 am an employee mounted a pair of slow moving rail cars to apply the brakes. The employee fell and was struck by the pair of freewheeling hopper rail cars. The employee was fatally injured because of the fall and being struck by the moving rail cars.