Mining Incidents

Big Oak Plant Metal/Non-Metal

San Antonio, Bexar County, TX  ·  Active
MSHA Mine ID: 4101126

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Fatalities
2
Total incidents
22
Years on record
2005–2025
Latest incident
Jun 2025
Compliance record
MSHA citations since 2000
340
citations
86
significant & substantial
$272,829
proposed penalties
$263,174
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 48,664 21 1 431.5
2025 Q3 40,801 3 1 73.5
2025 Q2 65,040 0 0 0.0
2024 Q3 44,670 0 0 0.0
2024 Q2 72,657 2 1 27.5
2023 Q4 60,117 14 4 232.9
2023 Q3 44,641 4 1 89.6
2023 Q2 72,015 57 18 791.5
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

Fatalities at this mine

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.

Reportable incidents

20 on file (excluding fatalities above)

2025 · 1 incident

June 4, 2025 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Superior Silica Sands LLC · Struck against stationary object

It was a clear summer morning. Miner was working in a group replacing the impeller on a pump that had gone out.

2024 · 1 incident

January 13, 2024 TX · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Superior Silica Sands LLC · Over-exertion (Not Elsewhere Classified)

Clear day. Miner was walking on a soft surface walkway that was clear of debris and hurt their foot.

2022 · 4 incidents

May 25, 2022 TX · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver OTHER
Superior Silica Sands LLC · Unclassified, insufficient data

We do not know if there is a recordable injury as no information has been provided after several attempts have been made to gather information. I do not know if there is an injury, the nature of it, or what treatments have been provided if any. I have no evidence of an actual fall and there is no video evidence. We are reporting for transparency.

May 14, 2022 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Superior Silica Sands LLC · Caught in, under or between running or meshing objects

Employee was operating Scraper. Employee went to check the cab filter while the machine was running, employee's left hand was caught between the door and the A/C blower motor catching ring finger and middle finger, leaving a laceration to both fingers. This resulted in two sutures in each of the affected fingers.

April 21, 2022 TX · Metal/Non-Metal belt foreman, maintenance foreman, maintenance supervisor MACHINERY
Superior Silica Sands LLC · Caught in, under or between a moving and a stationary object

Employee was going up to the upper level at the wet plant to complete a work order. The work order was to check a valve for operations. The valve was already taken off, it was open. Employee was in the process of taking the air hose off when the valve closed on employee's fingers amputating from the knuckles up.

February 17, 2022 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Superior Silica Sands LLC · Fall from ladders

Employee was coming down the ladder after greasing the elevator. While climbing down a foot slipped. Employee grabbed ahold of the ladder rung so they would not fall and felt their arm pop. Employee said that the right arm hurt approximately 3" below the elbow.

2021 · 3 incidents

November 23, 2021 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Superior Silica Sands LLC · Caught in, under or between a moving and a stationary object

EE was pulling on a V-belt while installing it onto a pump motor sheave. When the V-belt slipped on to the sheave, EE's right hand middle finger got pinched between the belt and the sheave. When EE pulled the hand back, the tip of the middle finger from the nail bed forward was cut off.

November 6, 2021 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman OTHER
Superior Silica Sands LLC · Bodily reaction, (Not Elsewhere Classified)

Employee bent down at the waist to inspect a loader pin, when EE stood EE's back tensed up and EE couldn't move.

2020 · 3 incidents

August 19, 2020 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Superior Silica Sands LLC · Struck by... (Not Elsewhere Classified)

Technician was removing a blade from a John Deere 772G Motor Grader when the back of the bolt slipped out of the carriage and onto EE's finger. The air impact wrench continued to spin the bolt, which shifted it's position, causing a laceration to technician's hand through the work gloves. Technician received eight (8) stitches to the right index finger.

August 7, 2020 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Superior Silica Sands LLC · Struck by falling object

Employee was installing a conveyor belt take up pulley. While pushing the pulley into position, the pulley fell and struck the employee on EE's left arm and ankles.

April 17, 2020 TX · Metal/Non-Metal dry screening plant operator, screen house operator HANDLING OF MATERIALS
Superior Silica Sands LLC · Over-exertion in pulling or pushing objects

Employee was sliding out the bottom screen of a Screen Deck with a co-worker when employee felt a sharp pain in lower back.

2019 · 2 incidents

November 5, 2019 TX · Metal/Non-Metal ball/rod/pebble/hand/limestone/dry mill operator, roller operator HANDLING OF MATERIALS
Superior Silica Sands LLC · Over-exertion in lifting objects

EE was lifting a lid to a bag house. EE was lifting with one hand while grabbing on to a hand rail with the other hand and as they sat the lid back down is when they started complaining of back pain. Employee did complete the rest of shift that night and went on days off. On Friday they reported that they needed to see a doctor and was taken to the clinic.

March 7, 2019 TX · Metal/Non-Metal dry screening plant operator, screen house operator POWERED HAULAGE
Superior Silica Sands LLC · Struck against a moving object

Employee was shoveling sand at the end of shift and reported to supervisor that back was sore. EE completed shift and went on 3 days off. Upon returning, employee was fine and operated a loader, until a few hours into shift, EE advised supervisor that back was hurting and ee needed to go home.

2018 · 5 incidents

September 17, 2018 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer OTHER
Superior Silica Sands LLC · Absorption of radiations, caustics, toxic and noxious substances

Employee was using the porta-john toilet when ee felt discomfort to the lower right outside calf muscle. The employee indicated that ee was bitten by a spider. There was no evidence of any type of insect in the porta-john. There were however spider webs observed in the corners.

September 15, 2018 TX · Metal/Non-Metal miner, prospector, nec POWERED HAULAGE
Superior Silica Sands LLC · Struck by falling object

While Shoveling sand away from a hopper on the backside, sand fell from the hopper onto the shoulder, neck and head area of the employee

August 22, 2018 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Superior Silica Sands LLC · Absorption of radiations, caustics, toxic and noxious substances

Employee was fueling equipment when the diesel fuel hose failed. The hose developed a hole causing diesel fuel to come in contact with the employee's eyes. The employee was wearing safety glasses at the time of the incident.

March 8, 2018 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Superior Silica Sands LLC · Struck against stationary object

Two employees were digging out sand beneath a conveyor that carries fine sand from the Hydrosizer to the sand pile. The employees were attempting to locate a power line to repair a short. One operator struck a metal support with shovel head when ee attempted to dig into the dirt. The impact caused a sprain/strain in left wrist.

January 11, 2018 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Superior Silica Sands LLC · Fall to the walkway or working surface

The employee sat down in a chair that then collapsed. As the employee fell to the floor a rivet from the chair cut the employee's left forearm near the elbow.

2005 · 1 incident

September 6, 2005 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Osburn Materials Inc · Struck by rolling or sliding object

IW was removing mounting links. This required frame to be blocked from vertical and forward movement, but was only blocked vertically by IW. When last pin was removed elevator frame rolled forward pinning IW between scraper bowl and elevator frame.