Mining Incidents

Alpine Silica-Monahans Metal/Non-Metal

Alpine Silica LLC · Surface
Controlled by Pro Frac Holding Corp
Monahans, Ector County, TX  ·  Active
MSHA Mine ID: 4105320

Alpine Silica-Monahans has $45K in proposed MSHA penalties and $4K outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
22
Years on record
2018–2024
Latest incident
Jul 2024
Compliance record
MSHA citations since 2018
161
citations
34
significant & substantial
$45,330
proposed penalties
$41,357
paid to date
91% of proposed penalties paid to date, a $3,973 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2018
31
inspections on record
839
inspection hours
n/a
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 839 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Alpine Silica-Monahans has $45K in proposed MSHA penalties and $4K outstanding across 2 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$45K
proposed penalties
$45K
current assessed
$41K
paid to date
$4K
outstanding
148 assessments are final orders; 2 contested dockets.
As of the most recent assessment on 2026-03-05.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 31,587 0 0 0.0
2025 Q3 24,115 5 1 207.3
2025 Q2 40,824 0 0 0.0
2025 Q1 38,931 2 0 51.4
2024 Q4 38,856 2 2 51.5
2024 Q3 33,622 0 0 0.0
2024 Q2 41,073 12 0 292.2
2024 Q1 31,659 0 0 0.0
Show 24 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 25,047 7 3 279.5
2023 Q3 35,116 3 1 85.4
2023 Q2 37,129 0 0 0.0
2023 Q1 46,957 0 0 0.0
2022 Q4 49,690 6 1 120.7
2022 Q3 47,580 9 0 189.2
2022 Q2 46,369 22 5 474.5
2022 Q1 37,979 0 0 0.0
2021 Q4 34,130 0 0 0.0
2021 Q3 30,176 9 2 298.3
2021 Q2 25,239 0 0 0.0
2021 Q1 9,673 6 1 620.3
2020 Q4 4,003 0 0 0.0
2020 Q3 5,223 6 1 1148.8
2020 Q2 18,466 0 0 0.0
2020 Q1 39,770 4 0 100.6
2019 Q4 50,039 0 0 0.0
2019 Q3 68,085 20 2 293.8
2019 Q2 81,754 3 0 36.7
2019 Q1 81,980 19 5 231.8
2018 Q4 83,494 0 0 0.0
2018 Q3 111,085 21 9 189.0
2018 Q2 104,839 0 0 0.0
2018 Q1 61,701 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

22 on file

2024 · 2 incidents

July 29, 2024 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech DISORDERS (PHYSICAL AGENTS)
Alpine Silica LLC · Contact with heat

Employee was adjusting the trunnion bearings of the dryer drum. Employee in 102° weather started to feel hot/ill, notified supervisor. EE was then taken to a break room. First aid administered. Symptoms worsened, decided to take employee to the hospital. When employee was stood up, EE lost consciousness but regained it a moment later. Taken by ambulance for medical treatment.

February 29, 2024 TX · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Alpine Silica LLC · Struck against stationary object

Employee was in the control room preparing for shift change. Employee then noticed co-worker had a knife on the table and asked if EE could look at it. Co-worker handed the knife to the employee. EE ended up grabbing it wrongly by the blade, cutting self in the process. Laceration required 6 sutures to close the wound. Employee returned to duty after medical treatment.

2023 · 1 incident

August 5, 2023 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Alpine Monahans, LLC · Struck by flying object

Employee suffered foreign body in their eye when turning on a shop fan. The fan stirred up dust in the shop. Employee was wearing safety glasses. First aid was administered(eye wash) but EE still felt something in the eye and requested medical attention. Employee was given prescription eye drops and returned to work.

2022 · 3 incidents

May 23, 2022 TX · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall to the walkway or working surface

An employee was walking in the chemical room to turn off a water hose being used to fill a tank when the employee slipped and fell on the concrete floor injuring back. The employee was diagnosed with nondisplaced left transverse process fractures at L3 and L4 vertebrae.

May 23, 2022 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Alpine Monahans, LLC · Struck by flying object

On 5/23/22 a maintenance employee was greasing trunnions on a sand dryer when EE felt something in EE's right eye. On 5/25/22 the eye continued to feel irritated, so EE sought medical treatment and a small piece of metal was removed from EE's eye.

April 6, 2022 TX · Metal/Non-Metal miner, prospector, nec HANDTOOLS (NONPOWERED)
Alpine Monahans, LLC · Struck by... (Not Elsewhere Classified)

An employee was trimming a dewatering screen panel with a razor knife when EE cut the tip of right index finger causing a laceration that required 5 sutures to repair.

2021 · 1 incident

October 26, 2021 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Over-exertion (Not Elsewhere Classified)

Injured employee was pulling a water hose while cleaning up an area at the wet plant. While walking EE stepped on a sand pile causing EE to trip injuring EE's right knee and back. Employee was diagnosed with a sprained right knee and back and was given work restrictions.

2019 · 7 incidents

October 27, 2019 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall from machine

A heavy equipment operator was dismounting an excavator at the end of the shift. The bottom access step was covered in mud and caused the employee to slip and land awkwardly injuring left knee. On 11/5/2019 the employee was diagnosed with a sprained MCL and placed on restricted duty as a result of the original injury.

October 14, 2019 TX · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Alpine Monahans, LLC · Over-exertion (Not Elsewhere Classified)

EE was walking across even ground and went to step up onto the truck scale (approx 12-18"). As EE began to lift self onto the platform, EE felt a pop in EE's left knee. Employee was seen by medical personnel the following day and was diagnosed with an unknown internal derangement of the left knee and placed on restriction.

July 3, 2019 TX · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Alpine Monahans, LLC · Struck by falling object

Employee was taking off a hatch from a Bucket Elevator, when EE accidentally dropped it on EE's Right Foot. Initially it was diagnosed as a contusion type injury. Upon follow up evaluation, the Physician diagnosed it as a fracture of the 5th digit little toe. This diagnosis was made on 7/10/2019.

June 3, 2019 TX · Metal/Non-Metal utility man, shift tech, service/dump truck operator SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall to the walkway or working surface

Employee slipped on some sand, straining back and right hand. The Employee was medically evaluated by a physician, X-Rays proved negative findings, and the Employee was prescribed muscle relaxants.

May 18, 2019 TX · Metal/Non-Metal electrician, lineman HANDLING OF MATERIALS
Alpine Monahans, LLC · Struck by falling object

Employee was replacing a blower on line A when EE was struck on the head with an 18" aluminum pipe wrench that had been dropped from an upper level of approximately 35'- 40'

April 18, 2019 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech EXPLODING VESSELS UNDER PRESSURE
Alpine Monahans, LLC · Struck by flying object

Contractor (MSHA ID: B9304) was in the process of changing out a valve and mufflers due to sand build-up. EE was in the process of unscrewing the valve from the air supply line when pressure in the valve propelled it striking the contractor on the left side of EE's face directly in the brow line causing an approximate 1.5" laceration.

April 10, 2019 TX · Metal/Non-Metal miner, prospector, nec DISORDERS (REPEATED TRAUMA)
Alpine Monahans, LLC · Over-exertion (Not Elsewhere Classified)

On 4/10 EE reported pain in right wrist. On 4/12 EE diagnosed with repetitive use disorder. On or about 7/14/19 disorder determined to be work related. Surgery on 7/26/19.

2018 · 8 incidents

December 9, 2018 TX · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant OTHER
Alpine Monahans, LLC · Bodily reaction, (Not Elsewhere Classified)

Employee was walking on regular QC Route and complained foot was hurting.

July 12, 2018 TX · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall to the walkway or working surface

Employee was walking to raw feed area to collect a sample for quality control. While walking, employee tripped in mud and fell down. First aid was performed. Employee went to an occupational clinic on July 16, 2018, where employee was treated for a sprained right knee.

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

Plant operator stepped onto grating. The grating shifted, causing the operator to trip and fall. First aid was provided. Employee went to an occupational clinic on July 18, 2018, where ee was treated for a sprained right knee.

June 16, 2018 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Alpine Monahans, LLC · Absorption of radiations, caustics, toxic and noxious substances

Diesel Exhaust Fluid splashed into miner's eye when removing the fueling nozzle. A medical review was performed on 8/22/18 that diagnosed the miner with chemical conjunctivitis and traumatic cataract of the left eye.

April 16, 2018 TX · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Alpine Monahans, LLC · Struck against a moving object

Dozer operator felt pain in EE's shoulder after driving EE's dozer into excavation.

April 3, 2018 TX · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall down stairs

Employee was walking down stairs when EE missed the last step and fell.

March 28, 2018 TX · Metal/Non-Metal welder (non-shop) HANDTOOLS (NONPOWERED)
Alpine Monahans, LLC · Struck by... (Not Elsewhere Classified)

Employee was using a 4 lb hammer and hammer wrench to loosen bolts on a Rotex. While swinging the hammer it hit a junction box in close proximity and caused the hammer to impact their ring finger on the left hand. Impact caused open fracture with blow out laceration at the tip of the finger.

March 7, 2018 TX · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Alpine Monahans, LLC · Fall to the walkway or working surface

Employee was leaving flocculant building when employee slipped.

For insurers, brokers, and safety consultants

The full compliance file on Alpine Silica-Monahans

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.