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Thompson Hills: 40 MSHA citations Metal/Non-Metal

Chetek, Barron County, WI  ·  Intermittent
MSHA Mine ID: 4703718

Thompson Hills has $3K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
4
Years on record
2015–2023
Latest incident
Jul 2023
Compliance record
MSHA citations since 2015
40
citations
8
significant & substantial
$3,118
proposed penalties
$3,118
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Blue Diamond Proppants LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2015
20
inspections on record
230
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: 230 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Thompson Hills has $3K in proposed MSHA penalties and $0 outstanding across 0 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.
$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
27 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2020-03-11.
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.
20.0%
significant & substantial
5.0%
high negligence or reckless
20.0%
reasonably likely or greater
35.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 30.0% low, 65.0% moderate, 5.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, 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: 2026-05-05
13
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg12
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (13)
Date Contaminant Concentration Limit Conc / limit Occupation
2026-05-05 Respirable dust, <.1mg 0 Yard Engine Operator
2026-05-05 Respirable dust, <.1mg 0 Complete Load-Haul-Dump
2022-11-08 Respirable dust, <.1mg 0 Washer Operator
2022-11-08 Respirable dust, <.1mg 0 Building Repair/Maint.
2022-11-08 Respirable dust, <.1mg 0 Laborer, Bullgang
2019-07-23 Unlisted Particulate, respirable, <1% Qtz 0.13 Supervisor, Co. Official
2019-07-23 Respirable dust, <.1mg 0 Mechanic
2019-07-23 Respirable dust, <.1mg 0 Mechanic
2018-05-01 Respirable dust, <.1mg 0 Washer Operator
2018-05-01 Respirable dust, <.1mg 0 Washer Operator
2018-05-01 Respirable dust, <.1mg 0 Washer Operator
2018-05-01 Respirable dust, <.1mg 0 Mechanic
2016-12-06 Respirable dust, <.1mg 0 Laborer, Bullgang
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.

Thompson Hills recorded 0.00 reportable injury cases per 100 full-time workers in 2018.

Injury rate, 2018
ⓘ 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 1.95 and the all-US-mining average was 2.33 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 2.60 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
2018 * 0.00 0.00 0.000
2017 * 5.74 5.74 0.000
2015 * 6.36 0.00 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. Superior Silica Sands 2014 to 2022
  2. Blue Diamond Proppants LLC 2022 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 7
2025 0
2024 7
2023 7
2022 7
2021 0
2020 1
2019 7
2018 14
2017 16
2016 14
2015 18
2014 18
Source: MSHA quarterly employment and production, updated weekly.

Thompson Hills 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
2026 Q2 2,162 0 0 0.0
2026 Q1 961 0 0 0.0
2025 Q4 0 0 0
2025 Q3 0 0 0
2025 Q2 0 0 0
2025 Q1 0 0 0
2024 Q4 6,608 0 0 0.0
2024 Q1 0 0 0
Show 38 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 1,760 0 0 0.0
2023 Q3 5,239 0 0 0.0
2023 Q2 4,588 0 0 0.0
2023 Q1 0 0 0
2022 Q4 3,989 0 0 0.0
2022 Q3 5,640 0 0 0.0
2022 Q2 1,075 1 0 930.2
2022 Q1 0 0 0
2021 Q4 0 0 0
2021 Q3 0 0 0
2021 Q2 0 0 0
2021 Q1 0 0 0
2020 Q4 0 0 0
2020 Q3 0 0 0
2020 Q2 24 0 0 0.0
2020 Q1 208 3 0 14423.1
2019 Q4 420 0 0 0.0
2019 Q3 7,178 3 0 417.9
2019 Q2 5,296 0 0 0.0
2019 Q1 3,455 0 0 0.0
2018 Q4 7,429 0 0 0.0
2018 Q3 10,710 0 0 0.0
2018 Q2 11,080 1 1 90.3
2018 Q1 4,372 0 0 0.0
2017 Q4 7,016 0 0 0.0
2017 Q3 11,332 0 0 0.0
2017 Q2 11,115 0 0 0.0
2017 Q1 5,369 0 0 0.0
2016 Q4 7,286 1 0 137.2
2016 Q3 8,234 0 0 0.0
2016 Q2 1,302 0 0 0.0
2016 Q1 1,325 0 0 0.0
2015 Q4 5,895 0 0 0.0
2015 Q3 11,041 2 1 181.1
2015 Q2 8,803 1 0 113.6
2015 Q1 5,728 0 0 0.0
2014 Q4 9,404 0 0 0.0
2014 Q3 6,990 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

4 on file

2023 · 2 incidents

July 23, 2023 WI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Blue Diamond Proppants LLC · Over-exertion (Not Elsewhere Classified)

The mine was not made aware of the injury until 08/02/2023 and all attempts to get information from the injured miner have not generated a response other than to say the miner was injured on the morning of Sunday July 23rd. The times of the incident are only entered because the online form requires them, but do not represent a factual time of the injury.

January 9, 2023 WI · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Blue Diamond Proppants LLC · Caught in, under or between a moving and a stationary object

At 1:20 PM, IT WAS REPORTED THAT EMPLOYEE HAD CUT A FINGER FROM WORKING ON A GARAGE DOOR OPENER. EE WAS SETTING THE OPEN AND CLOSE LIMITS ON ROLLERS. IT WAS REPORTED THEY LOST THEIR GRIP AND HAND SLIPPED AND CAUGHT LEFT RING FINGER IN THE CHAIN AND SPROCKET.

2017 · 1 incident

July 25, 2017 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Superior Silica Sands · Fall from machine

Employee was helping change the paddles on a scrubber. Employee was standing on the frame or the scrubber tower guiding the scrubber's into the chamber when employee lost balance and fell on to catwalk about 5 feet below. Employee was wearing fall protection but was not tied high enough to dampen the fall.

2015 · 1 incident

November 16, 2015 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Superior Silica Sands · Fall onto or against objects

The worker heard air leaking out of a bladder used for the final cleaning of the slurry line. When he went in front of the bladder it let loose and struck him in the stomach knocking him backwards causing him to lose balance and hit the back of his head on the pump behind him causing a small cut on the back of his head. That night he received 2 staples to keep cut closed.