Mining Incidents

Anderson Property Metal/Non-Metal

Piranha Proppant · Surface
Controlled by Mammoth Energy Services
Chetek, Barron County, WI  ·  Abandoned
MSHA Mine ID: 4703665

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Fatalities
0
Total incidents
17
Years on record
2012–2019
Latest incident
Jun 2019
Compliance record
MSHA citations since 2012
94
citations
17
significant & substantial
$25,079
proposed penalties
$21,680
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 0 0 0
2025 Q2 684 0 0 0.0
2025 Q1 1,447 0 0 0.0
2024 Q4 3,962 0 0 0.0
2024 Q3 4,262 0 0 0.0
2024 Q2 4,744 2 0 421.6
2024 Q1 5,772 0 0 0.0
2023 Q4 9,230 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

17 on file

2019 · 1 incident

June 21, 2019 WI · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Piranha Proppant · Struck against a moving object

The employee is a loader operator. While loading trucks, the operator drove over an area operator had dug out, jarring operator's back. The operator did not think there was an issue immediately, but back became worse over the next couple of days. Chiropractor indicated twisted L5.

2018 · 2 incidents

September 30, 2018 WI · Metal/Non-Metal miner, prospector, nec SLIP OR FALL OF PERSON
Piranha Proppant · Fall onto or against objects

Employee was walking through the maintenance shop and tripped on a piece of expanded metal. During the course of the fall, the employee caught hand on the edge of the metal, causing a laceration to the hand. Injury required stitches.

August 14, 2018 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Piranha Proppant · Fall to the walkway or working surface

Employee tripped on platform ramp edge, striking knee on platform grating.

2015 · 1 incident

November 5, 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 · Struck by... (Not Elsewhere Classified)

Employee moving forks on wheeled telescoping forklift to center position. Employee grabbed side of mast near for support bar free travel area. Fork hung up on support bar bracket and employee pushed fork to center. When fork fell into place, support bar fell through free travel area contacting employees thumb.

2014 · 4 incidents

October 15, 2014 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Over-exertion (Not Elsewhere Classified)

Employee was climbing onto a D-8 Dozer and slipped. Employee caught themselves with the arm that was maintaining a point of contact with the handhold. This caused the arm to extend and strain, resulting in a tear of a tendon in the bicep.

May 19, 2014 WI · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Fall to the walkway or working surface

Walking to collect sand samples. Employee checked the time on his watch and tripped and fell over large pipe. Landed on his right side, right elbow.

January 21, 2014 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Chieftain Sand and Proppant Barron, LLC · Struck by... (Not Elsewhere Classified)

Employee was using a pneumatic nail gun and the gun kicked back and a nail struck the employee in the left thumb area.

2013 · 6 incidents

July 23, 2013 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Chieftain Sand and Proppant Barron, LLC · Struck by flying object

Employee was striking a bolt with a metal sledge hammer. A shard of metal broke off and became lodged in his leg

April 1, 2013 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDTOOLS (NONPOWERED)
Chieftain Sand and Proppant Barron, LLC · Struck by flying object

Employee was striking ripping tooth with hammer and a piece of the tooth broke off and struck him in the lower lip causing a laceration.

January 21, 2013 WI · Metal/Non-Metal outside foreman, leadman HANDTOOLS (NONPOWERED)
Chieftain Sand and Proppant Barron, LLC · Struck by... (Not Elsewhere Classified)

Employee was removing cutting edge bolts and his hand was near the head of the bolt. The bolt slipped while removing with a pneumatic wrench and hit the palm of his left hand. The contact cause a laceration to the employee's palm.

January 6, 2013 WI · Metal/Non-Metal ledgeman/hand, quarry man SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Fall to the walkway or working surface

Employee was walking across company owned property to report to his work station. He tripped over ground deviation and fell, straining his right shoulder.

2012 · 3 incidents

September 17, 2012 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Fall to the walkway or working surface

Employee was not walking on the path, but chose an alternate route and tripped over a water hose. When he fell he injured his right hand.

September 6, 2012 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer RESPIRATORY CONDITIONS (TOXIC AGENTS)
Chieftain Sand and Proppant Barron, LLC · Unclassified, insufficient data

There was no accident, this is a claimed occupational illness. EE, a Stout Construction employee, goes to family doctor, thinks he has bronchitis because his sister has it at this current time. Doctor tells him that he should see a lung specialist. EE went to lung specialist 9/7/12 and was told not to return to the sand mine at this current time until more testing was completed.

September 6, 2012 WI · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON
Chieftain Sand and Proppant Barron, LLC · Over-exertion (Not Elsewhere Classified)

Employee was walking to work on site and stumbled but did not fall. Foot was sore but did not report it. On October 3, 2012 she went to the dr. and found foot was broken and then reported it. Left foot. No restrictions or treatment.