Mining Incidents

Sumner Wet Plant: 72 MSHA citations Metal/Non-Metal

cameron, Barron County, WI  ·  Active
MSHA Mine ID: 4703686

Sumner Wet Plant has $22K 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
18
Years on record
2013–2026
Latest incident
Feb 2026
Compliance record
MSHA citations since 2013
72
citations
20
significant & substantial
$22,278
proposed penalties
$22,278
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2013
38
inspections on record
901
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: 901 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Sumner Wet Plant has $22K 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.
$22K
proposed penalties
$22K
current assessed
$22K
paid to date
$0
outstanding
71 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-11-24.
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.
27.8%
significant & substantial
5.6%
high negligence or reckless
27.8%
reasonably likely or greater
58.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 58.3% low, 36.1% moderate, 5.6% 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: 2025-11-25
0%
of limit-tested samples over the exposure limit
33
samples
5
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg19
  • Quartz, respirable, >1% Qtz10
  • Unlisted Particulate, respirable, <1% Qtz4
Show the individual readings (33)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-11-25 Quartz, respirable, >1% Qtz 0.24 1.41 0.17 Building Repair/Maint.
2025-11-25 Quartz, respirable, >1% Qtz 0.19 Utility Man
2025-11-25 Respirable dust, <.1mg 0 Washer Operator
2024-04-23 Respirable dust, <.1mg 0 Utility Man
2024-04-23 Respirable dust, <.1mg 0 Washer Operator
2024-04-23 Unlisted Particulate, respirable, <1% Qtz 0.15 Building Repair/Maint.
2022-09-28 Unlisted Particulate, respirable, <1% Qtz 0.13 Utility Man
2022-09-28 Quartz, respirable, >1% Qtz 0.25 Building Repair/Maint.
2022-09-28 Unlisted Particulate, respirable, <1% Qtz 0.13 Building Repair/Maint.
2022-09-28 Quartz, respirable, >1% Qtz 0.18 Utility Man
2022-06-28 Respirable dust, <.1mg 0 Washer Operator
2022-06-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2022-06-28 Respirable dust, <.1mg 0 Utility Man
2021-04-15 Quartz, respirable, >1% Qtz 0.25 0.83 0.30 Mechanic
2021-04-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2021-04-15 Quartz, respirable, >1% Qtz 0.19 Utility Man
2021-04-15 Quartz, respirable, >1% Qtz 0.17 Washer Operator
2020-04-29 Respirable dust, <.1mg 0 Bulldozer Operator
2020-04-29 Respirable dust, <.1mg 0 Supervisor, Co. Official
2020-04-29 Respirable dust, <.1mg 0 Utility Man
2019-05-22 Unlisted Particulate, respirable, <1% Qtz 0.6 Building Repair/Maint.
2019-05-22 Quartz, respirable, >1% Qtz 0.19 0.61 0.31 Utility Man
2019-05-22 Respirable dust, <.1mg 0 Utility Man
2017-12-05 Respirable dust, <.1mg 0 Washer Operator
2017-12-05 Respirable dust, <.1mg 0 Washer Operator
2017-12-05 Respirable dust, <.1mg 0 Utility Man
2017-12-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-01-18 Respirable dust, <.1mg 0 Washer Operator
2017-01-18 Quartz, respirable, >1% Qtz 0.26 0.45 0.58 Washer Operator
2017-01-18 Respirable dust, <.1mg 0 Washer Operator
2014-10-28 Respirable dust, <.1mg 0 Washer Operator
2014-10-28 Quartz, respirable, >1% Qtz 0.16 1.14 0.14 Laborer, Bullgang
2014-10-28 Respirable dust, <.1mg 0 Lab Technician
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.

Sumner Wet Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Wisconsin, metal and nonmetal mining averaged 1.80 cases per 100 workers that year.
Year total case rate days-away fatal
2025 0.00 0.00 0.000
2024 0.00 0.00 0.000
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 0.00 0.00 0.000
2018 1.17 1.17 0.000
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. Canadian Sand And Proppants L.P. 2013 to 2013
  2. Source Energy Services Proppants LP 2013 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 65
2025 66
2024 69
2023 65
2022 58
2021 57
2020 62
2019 67
2018 80
2017 68
2016 66
2015 59
2014 42
2013 16
Source: MSHA quarterly employment and production, updated weekly.

Sumner Wet Plant 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 29,632 0 0 0.0
2026 Q1 29,505 0 0 0.0
2025 Q4 28,894 0 0 0.0
2025 Q3 27,597 0 0 0.0
2025 Q2 28,865 0 0 0.0
2025 Q1 29,780 1 0 33.6
2024 Q4 30,566 0 0 0.0
2024 Q3 30,071 0 0 0.0
Show 45 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 28,981 2 0 69.0
2024 Q1 29,820 0 0 0.0
2023 Q4 29,092 1 0 34.4
2023 Q3 30,246 0 0 0.0
2023 Q2 32,204 0 0 0.0
2023 Q1 30,764 1 0 32.5
2022 Q4 30,447 1 0 32.8
2022 Q3 29,932 5 3 167.0
2022 Q2 27,701 1 0 36.1
2022 Q1 35,208 0 0 0.0
2021 Q4 27,313 6 1 219.7
2021 Q3 29,368 0 0 0.0
2021 Q2 29,507 2 1 67.8
2021 Q1 30,616 0 0 0.0
2020 Q4 29,768 3 0 100.8
2020 Q3 31,119 0 0 0.0
2020 Q2 31,044 0 0 0.0
2020 Q1 34,181 0 0 0.0
2019 Q4 34,948 2 0 57.2
2019 Q3 39,171 0 0 0.0
2019 Q2 35,195 5 0 142.1
2019 Q1 25,787 0 0 0.0
2018 Q4 35,173 0 0 0.0
2018 Q3 45,779 0 0 0.0
2018 Q2 46,957 0 0 0.0
2018 Q1 43,745 0 0 0.0
2017 Q4 34,289 2 0 58.3
2017 Q3 36,031 2 2 55.5
2017 Q2 34,973 4 0 114.4
2017 Q1 36,106 3 0 83.1
2016 Q4 34,305 0 0 0.0
2016 Q3 30,817 5 2 162.2
2016 Q2 35,807 7 3 195.5
2016 Q1 32,221 2 1 62.1
2015 Q4 27,931 0 0 0.0
2015 Q3 31,820 0 0 0.0
2015 Q2 32,092 0 0 0.0
2015 Q1 30,525 4 4 131.0
2014 Q4 25,001 1 0 40.0
2014 Q3 26,730 0 0 0.0
2014 Q2 24,845 1 0 40.2
2014 Q1 13,367 0 0 0.0
2013 Q4 14,726 2 0 135.8
2013 Q3 7,842 0 0 0.0
2013 Q2 882 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

18 on file

2026 · 1 incident

February 20, 2026 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Source Energy Services Proppants LP · Caught in, under or between a moving and a stationary object

Maintenance Employee got their right index finger caught between a roller they were attempting to put in position and the drive gear for the roller.

2018 · 2 incidents

September 20, 2018 WI · Metal/Non-Metal utility man, shift tech, service/dump truck operator SLIP OR FALL OF PERSON
Source Energy Services Proppants LP · Fall to the walkway or working surface

Miner was walking through the plant - Reached to open door into the floc room - left leg slipped from underneath EE causing EE to land on the right patella (knee).

April 17, 2018 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech FALLING/SLIDING/ROLLING MATERIALS
Source Energy Services Proppants LP · Struck by falling object

We were contracted to change tires on a 844 John Deere loader. In the process of jacking the equipment up - the blocking and jack failed causing the loader to shift downward and the employee was struck by the loader frame.

2017 · 1 incident

September 29, 2017 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON

Miner was coming down a flight of stairs - quickly and skipping steps. Miner caught foot on the bottom last couple steps and fell hitting miner's head.

2016 · 4 incidents

September 5, 2016 WI · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Source Energy Services Proppants LP · Over-exertion in lifting objects

Employee was shoveling sand onto a conveyor belt. Employee was cleaning underneath the conveyor. As ee was lifting the sand to put on the conveyor ee felt left shoulder pop. This causing pain in shoulder.

July 28, 2016 WI · Metal/Non-Metal belt foreman, maintenance foreman, maintenance supervisor HANDTOOLS (NONPOWERED)
Source Energy Services Proppants LP · Struck by falling object

Miner was replacing a valve that was worn out using an adjustable wrench. Miner had 4 bolts to remove - upon EE's last bolt to remove the valve dropped causing a laceration on EE's left forearm.

June 9, 2016 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Source Energy Services Proppants LP · Struck by... (Not Elsewhere Classified)

While changing bucket teeth a metal fragment struck Miner's arm.

January 29, 2016 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Source Energy Services Proppants LP · Caught in, under or between a moving and a stationary object

While wheeling a 5" roller into place for as a replacement part for a belt press the roller came off the cart causing the individuals finger to be caught between the roller and floor grating. The individual suffered a break in the middle finger.

2015 · 6 incidents

November 17, 2015 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Source Energy Services Proppants LP · Struck against a moving object

While operating a haul truck the individuals tires slipped into a rut causing his head and neck to have a whiplash type effect.

November 12, 2015 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Source Energy Services Proppants LP · Over-exertion (Not Elsewhere Classified)

While setting up water pumps in the mine the individual stepped on unleveled ground casing the individual to twist his knee.

October 10, 2015 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Source Energy Services Proppants LP · Over-exertion in lifting objects

The individual was clearing material from the scalping tower location. While doing this clearing the individual attempted to pick up a large rock to remove it from the area, while lifting this rock it caused the individual back pain.

May 27, 2015 WI · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant OTHER
Source Energy Services Proppants LP · Absorption of radiations, caustics, toxic and noxious substances

While reaching for the door handle on the quality control lab the individual received a bee sting on his left hand.

April 13, 2015 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Source Energy Services Proppants LP · Caught in, under or between running or meshing objects

The employee was in an Aerial Lift working to clear a troughing roller utilizing a hammer. The equipment was not locked out at the time of incident causing the hammer to be drawn into the troughing roller also drawing the employee's hand in between the belt and roller. The employee received a hand contusion as a result of the incident.

February 5, 2015 WI · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Source Energy Services Proppants LP · Over-exertion (Not Elsewhere Classified)

The individual was carrying a 5 gallon fuel can to refill a heater located in the second level of the scalping tower. This individual reports slipping on ice while accessing the tower to refuel the heaters.

2014 · 3 incidents

July 3, 2014 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Source Energy Services Proppants LP · Struck by... (Not Elsewhere Classified)

While working in a Scissor Lift cutting a threaded rod with a reciprocating saw, the saw blade caught causing the saw to kick back impacting the operator's face/upper lip region causing a cut/laceration.

June 4, 2014 WI · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Source Energy Services Proppants LP · Caught in, under or between a moving and a stationary object

Driver was adjusting tailgate chain and box was slightly raised, chain moved pinching his two fingers.

May 26, 2014 WI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Source Energy Services Proppants LP · Struck by... (Not Elsewhere Classified)

This individual was cleaning out next to a conveyer when a rock struck him in the back of the neck causing some pain in the shoulder along with numbness in the right arm.

2013 · 1 incident

August 8, 2013 WI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech OTHER
Canadian Sand And Proppants L.P. · Bodily reaction, (Not Elsewhere Classified)

This individual was walking under a out of service conveyer and ducked to avoid contact with the conveyer the individual used poor body mechanics resulted in a twisting motion causing a minor back strain. This did not cause damage to the mining operation.