Mining Incidents

Piranha Proppant-Load Out Facility Metal/Non-Metal

Piranha Proppant, LLC · Facility
Controlled by Mammoth Energy Services
New Auburn, Barron County, WI  ·  Abandoned
MSHA Mine ID: 4703675

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Fatalities
0
Total incidents
14
Years on record
2013–2023
Latest incident
Jun 2023
Compliance record
MSHA citations since 2012
43
citations
5
significant & substantial
$6,233
proposed penalties
$6,030
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 Q3 3,987 0 0 0.0
2025 Q2 5,301 0 0 0.0
2025 Q1 4,790 1 1 208.8
2024 Q4 7,500 0 0 0.0
2024 Q3 6,362 0 0 0.0
2024 Q2 7,898 0 0 0.0
2024 Q1 11,698 0 0 0.0
2023 Q4 10,002 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

14 on file

2023 · 1 incident

June 13, 2023 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Piranha Proppant, LLC · Struck by falling object

Employee was assisting with removal of conveyor covers. As covers were being handed/lowered to him, accumulated sand fell off and onto the employee.

2019 · 2 incidents

May 13, 2019 WI · Metal/Non-Metal FIRE
Piranha Proppant, LLC · Accident type, without injuries

Dry spring grass was ignited by sparking from carbon build up in locomotive exhaust stack. Damage was limited to grass on property. No equipment or other asset damage. No injuries.

March 26, 2019 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Piranha Proppant, LLC · Over-exertion in lifting objects

Employee was working on 3/26/19 in dry plant shoveling out built up sand. Employee woke up the morning of 3/27/19 with a sore back and went to urgent care. The employee was diagnosed with muscle strain and was given one day off by the attending physician, and a return to work with restrictions until follow up appointment on 4/3/2019.

2015 · 3 incidents

July 29, 2015 WI · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Over-exertion in lifting objects

Employee reported pain in shoulder verbally to supervisor on 7/29 but was unsure if work related or not. Supervisor did not complete an incident report and SH manager was unaware. Employee called on 8/12 to say that employee saw doctor, and doctor thinks there may be herniated disk. Employee is on temporary layoff as of 8/10.

May 13, 2015 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Fall onto or against objects

Employee walking along top of the railcar when SRL locking mechanism engaged pulling the employee back and striking leg against a hatch which caused injury. Employee declined medical attention because he thought it was bruised/sprained. Employee requested medical evaluation on 6/2/15 because it was still sore. Upon evaluation a fractured fibula was discovered.

February 21, 2015 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Over-exertion (Not Elsewhere Classified)

Contract employee injured left knee while attempting to operate a switch which was difficult to move. The employee did not report the incident immediately but tried to self treat. Employee reported the incident on 02/25/2015.

2014 · 6 incidents

December 9, 2014 WI · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Caught in, under or between (Not Elsewhere Classified)

Employee was removing sand from tailgate and pinched fingers.

November 10, 2014 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator STEPPING OR KNEELING ON OBJECT
Chieftain Sand and Proppant Barron, LLC · Struck against stationary object

Employee was walking from a control panel to a check a temperature probe for a kiln. While walking the employee stepped onto the concrete slab of the kiln building with the foot partially overhanging the slight ledge. When the employee put the weight down, it caused the ankle to twist and sprain.

October 14, 2014 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator OTHER
Chieftain Sand and Proppant Barron, LLC · (Not Elsewhere Classified)

Employee audiogram indicated standard threshold shift.

October 7, 2014 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Over-exertion (Not Elsewhere Classified)

Employee was opening up a hatch toward the bottom of a hopper connected to a bucket elevator. The door swung open and hyper extended the employees arm causing a strain to the shoulder.

June 17, 2014 WI · Metal/Non-Metal plumber, pipefitter, millwright HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Struck by... (Not Elsewhere Classified)

EE was removing an electric motor from a conveyor - he was lifting it up and in the process a bolt caught the edge of a guard lying nearby, causing it to fall and hit him in the tooth. When he was hit with the guard, he also dropped the motor on his finger resulting in a cut on his left ring finger.

2013 · 2 incidents

December 10, 2013 WI · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor HANDLING OF MATERIALS
Chieftain Sand and Proppant Barron, LLC · Struck against stationary object

Employee was attempting to open a rail car hatch. When the hatch broke free, the employee's head went forward striking a part of the car.

February 13, 2013 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Caught in, under or between (Not Elsewhere Classified)

Employee was pushing a high pressure sprayer and lost traction with his footing. When he fell forward the handle on the sprayer pinched his left hand.