Mining Incidents

Alpine Silica-San Antonio Metal/Non-Metal

Alpine Silica, LLC · Surface
Controlled by Pro Frac Holding Corp
San Antonio, Bexar County, TX  ·  Active
MSHA Mine ID: 4105426

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Fatalities
1
Total incidents
15
Years on record
2019–2026
Latest incident
Mar 2026

Fatalities at this mine

1 recorded
March 28, 2026 TX · Metal/Non-Metal steel worker, iron metal worker, iron worker Fatality · SLIP OR FALL OF PERSON
Alpine Silica, LLC · Fall from scaffolds, walkways, platforms

Employee unhooked lanyard and fell through roof resulting in fatal injuries.

Reportable incidents

14 on file (excluding fatalities above)

2024 · 5 incidents

December 16, 2024 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Alpine Silica, LLC · Struck by flying object

Operator was using a 2 pound sledgehammer to remove a worn tooth from an excavator bucket. When the operator hit the worn tooth (one time) with the hammer, a metal shard broke off of the worn tooth and passed through the operator's pants and the top of EE's leather boots before penetrating the operator's left leg, just above EE's ankle.

November 30, 2024 TX · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Alpine Silica, LLC · Struck by... (Not Elsewhere Classified)

Miner struck by 'clay boulder' when EE crawled into a feed hopper to clear an obstruction. The miner suffered muscle damage requiring hospitalization and medication. Diagnosed with Rhabdomyolysis. No broken bones were found during the examination.

November 6, 2024 TX · Metal/Non-Metal superintendent HANDLING OF MATERIALS
Alpine Silica, LLC · Struck against stationary object

Miner Suffered a laceration requiring 6 sutures to their left arm while removing a dryer expansion joint.

September 22, 2024 TX · Metal/Non-Metal utility man, shift tech, service/dump truck operator EXPLOSIVES AND BREAKING AGENTS
Alpine Silica, LLC · Contact with hot objects or substances

Miner suffered 3rd degree burns to the abdomen when a hose popped off the seal pump in the process of removal. Burns required debridement and an allograft.

April 23, 2024 TX · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Alpine Silica, LLC · Struck by flying object

While observing another miner removing teeth from an excavator bucket from approximately 5-6 feet away. The injured miner was struck in the hand by a shard of metal (approximately 4mm X5mm) that broke off of the excavator tooth.

2023 · 3 incidents

March 27, 2023 TX · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS
Monarch Silica, LLC · Struck by... (Not Elsewhere Classified)

Miner suffered pinch caused laceration to 5th digit of right hand when latch sprung open from tension on rotex door. Miner was in process of inspecting screens. Laceration required 3 sutures to close wound. Miner returned to work to complete shift.

March 26, 2023 TX · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Monarch Silica, LLC · Struck by falling object

Miner suffered crushing laceration to big toe on right foot when a counterweight fell, striking EE's foot. EE was wearing steel toe boots which protected the foot from more serious injury. The miners were in process of changing a belt on wet plant machinery. A come-a-long holding the counterweight slipped allowing the weight to fall.

February 15, 2023 TX · Metal/Non-Metal hydrate plant operator HANDLING OF MATERIALS
Monarch Silica, LLC · Struck against stationary object

While conducting inspection of a conveyor, they grasped a roller which had a sharp edge causing laceration to their hand which required 5 sutures to close the wound.

2022 · 4 incidents

July 29, 2022 TX · Metal/Non-Metal rotary bucket excavator operator SLIP OR FALL OF PERSON
Monarch Silica, LLC · Over-exertion (Not Elsewhere Classified)

The employee slipped while climbing down from an Excavator's tracks. EE had three points of contact and did not fall but sprained shoulder.

June 9, 2022 TX · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Monarch Silica, LLC · Struck against a moving object

EE was traveling down the main entrance road, with EE's bucket down low and hit a pot hole. EE's bucket contacted the ground and the loader came to an abrupt stop and EE's improperly adjusted seat belt let EE bounce too far forward. EE slammed into the front of the loader causing a concussion (w/o LOC), small forehead cuts, and bruising.

June 9, 2022 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Monarch Silica, LLC · Rubbed or abraded

Employee was adjusting the chain rigging on a dewatering screen motor. They hooked the rigging onto the fork of a skytrac. The skytrac operator did not wait for verbal confirmation or hand signals to begin lifting the load. Employee still had a hand on the chain and received a laceration on right hand ring finger.

April 1, 2022 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Monarch Silica, LLC · Struck against a moving object

An employee was driving the manlift around the side of the plant to look into one of the main feed hoppers to check for a material cog. A front wheel loader working in the area did not see the manlift and backed into it. This caused the employee to slam into the handrail. This caused a muscle contusion on EE's left leg.

2021 · 1 incident

March 19, 2021 TX · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Monarch Silica, LLC · Fall to lower level, (Not Elsewhere Classified)

A truck driver arrived on site around 10:15PM and pulled up to MS, LLC's Safe Rach System to open the sand box hatch. Driver lowered the Safe-Rack cage properly onto the box. While opening the box hatch, Driver slipped and fell into the sand box. Local emergency response used a rescue ladder to help the driver climb out of the sand box.

2019 · 1 incident

May 31, 2019 TX · Metal/Non-Metal rotary bucket excavator operator SLIP OR FALL OF PERSON
Monarch Silica, LLC · Over-exertion (Not Elsewhere Classified)

Employee was climbing off excavator and slipped in the mud on the ground. Causing a small knee strain.