Mining Incidents

Anderson Property: 94 MSHA citations Metal/Non-Metal

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

Anderson Property has $25K in proposed MSHA penalties and $4 outstanding across 3 contested dockets, plus health sampling and the full incident record.

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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
86% of proposed penalties paid to date, a $3,399 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2012
32
inspections on record
484
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: 484 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Anderson Property has $25K in proposed MSHA penalties and $4 outstanding across 3 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.
$25K
proposed penalties
$22K
current assessed
$22K
paid to date
$4
outstanding
94 assessments are final orders; 3 contested dockets.
Of $8K in penalties contested before the Commission, $4K was upheld in final decisions.
As of the most recent assessment on 2024-06-27.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
18.1%
significant & substantial
1.1%
high negligence or reckless
18.1%
reasonably likely or greater
55.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 33.0% low, 66.0% moderate, 1.1% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
5 citations taken to the federal commission · 5% of citations on record
  • Settled 4 · 80%
  • Vacated or withdrawn 1 · 20%
50%
S&S designation survived the contest
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 2 decided S&S contests · industry: 79%
46%
Penalty reduction in decided contests
$8K proposed, $4K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2019-09-15.
Contested penalties
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
LAKE 2015-0572 Settlement Bulluck 2015 $5K → $1K
LAKE 2019-0376 Settlement Simonton 2020 $3K → $3K
LAKE 2013-210M Settlement Zielinski 2013 $100 → $100
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2022-10-26, 3 years ago
0%
of limit-tested samples over the exposure limit
25
samples
3
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg20
  • Quartz, respirable, >1% Qtz4
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (25)
Date Contaminant Concentration Limit Conc / limit Occupation
2022-10-26 Quartz, respirable, >1% Qtz 0.13 Laborer, Bullgang
2022-10-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-10-26 Respirable dust, <.1mg 0 Washer Operator
2022-10-26 Respirable dust, <.1mg 0 Laborer, Bullgang
2019-06-25 Respirable dust, <.1mg 0 Washer Operator
2019-06-25 Quartz, respirable, >1% Qtz 0.13 0.43 0.30 Washer Operator
2019-06-25 Respirable dust, <.1mg 0 Washer Operator
2018-05-09 Respirable dust, <.1mg 0 Washer Operator
2018-05-09 Respirable dust, <.1mg 0 Truck Driver
2018-05-09 Respirable dust, <.1mg 0 Utility Man
2018-05-09 Respirable dust, <.1mg 0 Truck Driver
2017-09-20 Respirable dust, <.1mg 0 Backhoe Operator
2017-09-20 Respirable dust, <.1mg 0 Washer Operator
2017-09-20 Respirable dust, <.1mg 0 Cleanup Man
2015-05-07 Respirable dust, <.1mg 0 Washer Operator
2015-05-07 Respirable dust, <.1mg 0 Cleanup Man
2015-05-07 Respirable dust, <.1mg 0 Backhoe Operator
2015-05-07 Respirable dust, <.1mg 0 Mechanic
2012-10-16 Respirable dust, <.1mg 0 Bulldozer Operator
2012-10-16 Respirable dust, <.1mg 0 Bulldozer Operator
2012-10-16 Quartz, respirable, >1% Qtz 0.19 0.37 0.51 Bulldozer Operator
2012-10-16 Quartz, respirable, >1% Qtz 0.12 0.15 0.80 Bulldozer Operator
2012-09-26 Respirable dust, <.1mg 0 Front-end Loader Operator
2012-09-26 Unlisted Particulate, respirable, <1% Qtz 0.43 Mechanic
2012-09-26 Respirable dust, <.1mg 0 Truck Driver
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

Anderson Property recorded 0.00 reportable injury cases per 100 full-time workers in 2023.

Injury rate, 2023
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.78 and the all-US-mining average was 2.10 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 2.64 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2019 1.64 1.64 0.000
2018 * 4.15 0.00 0.000
2017 * 0.00 0.00 0.000
2015 * 3.17 3.17 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Chieftain Sand and Proppant Barron, LLC 2012 to 2017
  2. Piranha Proppant 2017 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2025 2
2024 19
2023 29
2022 33
2021 21
2020 22
2019 57
2018 41
2017 13
2016 5
2015 33
2014 63
2013 48
2012 31
Source: MSHA quarterly employment and production, updated weekly.

Anderson Property sits in Barron County, Wisconsin, where the Census mining category is 0.7% of county employment.

Local economic context
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Barron County, Wisconsin · Population 46,741
0.7%
Mining share of county employment
$64,619
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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 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 1 0 210.8
2024 Q1 5,772 0 0 0.0
2023 Q4 9,230 0 0 0.0
Show 45 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q3 15,332 0 0 0.0
2023 Q2 14,598 0 0 0.0
2023 Q1 7,648 0 0 0.0
2022 Q4 12,578 4 0 318.0
2022 Q3 23,262 3 0 129.0
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 2 0 152.7
2021 Q2 8,898 0 0 0.0
2021 Q1 4,678 0 0 0.0
2020 Q4 4,822 0 0 0.0
2020 Q3 4,814 0 0 0.0
2020 Q2 4,506 1 0 221.9
2020 Q1 19,938 0 0 0.0
2019 Q4 17,359 0 0 0.0
2019 Q3 48,455 0 0 0.0
2019 Q2 30,116 13 2 431.7
2019 Q1 25,678 0 0 0.0
2018 Q4 25,175 0 0 0.0
2018 Q3 25,297 1 0 39.5
2018 Q2 25,493 2 1 78.5
2018 Q1 20,386 0 0 0.0
2017 Q4 21,078 0 0 0.0
2017 Q3 7,490 0 0 0.0
2017 Q2 0 0 0
2017 Q1 510 0 0 0.0
2016 Q4 490 0 0 0.0
2016 Q3 1,862 0 0 0.0
2016 Q2 2,687 2 1 744.3
2016 Q1 3,624 0 0 0.0
2015 Q4 3,333 0 0 0.0
2015 Q3 11,021 5 0 453.7
2015 Q2 24,390 10 3 410.0
2015 Q1 24,417 0 0 0.0
2014 Q4 33,016 0 0 0.0
2014 Q3 41,498 0 0 0.0
2014 Q2 36,778 14 2 380.7
2014 Q1 22,642 0 0 0.0
2013 Q4 24,791 7 3 282.4
2013 Q3 32,126 0 0 0.0
2013 Q2 25,871 1 0 38.7
2013 Q1 26,249 0 0 0.0
2012 Q4 24,574 3 0 122.1
2012 Q3 17,092 9 2 526.6
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.