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

Piranha Proppant-Load Out Facility has $6K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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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
97% of proposed penalties paid to date, a $203 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2012
34
inspections on record
529
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: 529 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Piranha Proppant-Load Out Facility has $6K in proposed MSHA penalties and $0 outstanding across 1 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.
$6K
proposed penalties
$6K
current assessed
$6K
paid to date
$0
outstanding
42 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2025-03-18.
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 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
Show 44 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q3 11,438 0 0 0.0
2023 Q2 13,834 0 0 0.0
2023 Q1 17,768 1 0 56.3
2022 Q4 9,054 0 0 0.0
2022 Q3 23,262 0 0 0.0
2022 Q2 18,828 0 0 0.0
2022 Q1 14,192 0 0 0.0
2021 Q4 11,494 0 0 0.0
2021 Q3 13,098 0 0 0.0
2021 Q2 8,898 0 0 0.0
2021 Q1 4,678 0 0 0.0
2020 Q4 4,822 1 0 207.4
2020 Q3 4,814 1 0 207.7
2020 Q2 4,506 2 0 443.9
2020 Q1 19,938 0 0 0.0
2019 Q4 17,359 0 0 0.0
2019 Q3 48,455 1 0 20.6
2019 Q2 30,116 4 1 132.8
2019 Q1 48,546 0 0 0.0
2018 Q4 47,540 0 0 0.0
2018 Q3 53,970 0 0 0.0
2018 Q2 51,034 0 0 0.0
2018 Q1 38,372 0 0 0.0
2017 Q4 40,386 1 0 24.8
2017 Q3 12,730 1 0 78.6
2017 Q2 2,248 0 0 0.0
2017 Q1 3,141 0 0 0.0
2016 Q4 2,946 0 0 0.0
2016 Q3 9,760 0 0 0.0
2016 Q2 12,344 0 0 0.0
2016 Q1 14,643 1 0 68.3
2015 Q4 13,265 0 0 0.0
2015 Q3 20,226 6 0 296.6
2015 Q2 30,772 0 0 0.0
2015 Q1 42,424 0 0 0.0
2014 Q4 45,402 13 1 286.3
2014 Q3 43,989 1 0 22.7
2014 Q2 43,061 0 0 0.0
2014 Q1 41,400 0 0 0.0
2013 Q4 44,355 4 1 90.2
2013 Q3 38,406 0 0 0.0
2013 Q2 32,582 0 0 0.0
2013 Q1 33,649 3 1 89.2
2012 Q4 28,263 2 0 70.8
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.

For insurers, brokers, and safety consultants

The full compliance file on Piranha Proppant-Load Out Facility

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.