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Thun Field Pit: 184 MSHA citations Metal/Non-Metal

Controlled by Heidelberg Materials AG
Puyallup, Pierce County, WA  ·  Active
MSHA Mine ID: 4501111

Thun Field Pit has $49K in proposed MSHA penalties and $2K outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
18
Years on record
1990–2023
Latest incident
Oct 2023
Compliance record
MSHA citations since 2000
184
citations
39
significant & substantial
$48,634
proposed penalties
$46,112
paid to date
95% of proposed penalties paid to date, a $2,522 gap.
Source: MSHA violations data, updated weekly.
See HM Pacific Northwest Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
86
inspections on record
1,327
inspection hours
13.9
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.
184 citations across 1,327 inspection hours.
Source: MSHA inspections data, updated weekly.

Thun Field Pit has $49K in proposed MSHA penalties and $2K 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.
$49K
proposed penalties
$49K
current assessed
$46K
paid to date
$2K
outstanding
184 assessments are final orders; 1 contested dockets.
Of $495 in penalties contested before the Commission, $450 was upheld in final decisions.
As of the most recent assessment on 2026-04-14.
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.
21.2%
significant & substantial
2.2%
high negligence or reckless
21.2%
reasonably likely or greater
46.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 23.9% low, 73.9% moderate, 2.2% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
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
WEST 2004-425M Settlement Bulluck 2004 $495 → $450
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: 2025-09-11
0%
of limit-tested samples over the exposure limit
26
samples
12
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg14
  • Quartz, respirable, >1% Qtz8
  • Arsenic fumes2
  • Beryllium fumes2
Show the individual readings (50)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-09-11 Quartz, respirable, >1% Qtz 0.14 0.78 0.18 Front-end Loader Operator
2025-09-11 Respirable dust, <.1mg 0 Crusher Oper/Worker
2025-09-11 Respirable dust, <.1mg 0 Laborer, Bullgang
2019-05-01 Respirable dust, <.1mg 0 Truck Driver
2019-05-01 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-06-06 Respirable dust, <.1mg 0 Laborer, Bullgang
2018-06-06 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-06-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-09-30 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-09-30 Quartz, respirable, >1% Qtz 0.35 0.94 0.37 Washer Operator
2015-09-30 Quartz, respirable, >1% Qtz 0.21 0.92 0.23 Truck Driver
2009-09-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-09-29 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-04-16 Vanadium fumes 0 50 0.00 Welder, etc.
2009-04-16 Zinc oxide fumes 0.07 10 0.01 Welder, etc.
2009-04-16 Arsenic fumes 0 1500 0.00 Welder, etc.
2009-04-16 Beryllium fumes 0 6 0.00 Welder, etc.
2009-04-16 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2009-04-16 Chromium, insoluble 0 3 0.00 Welder, etc.
2009-04-16 Cobalt fumes 0 300 0.00 Welder, etc.
2009-04-16 Copper fumes 0 300 0.00 Welder, etc.
2009-04-16 Iron oxide fumes 0.45 20 0.02 Welder, etc.
2009-04-16 Lead fumes 0 450 0.00 Welder, etc.
2009-04-16 Magnesium oxide fumes 0.05 20 0.00 Welder, etc.
2009-04-16 Manganese fumes 0.12 5 0.02 Welder, etc.
2009-04-16 Nickel fumes 0 3 0.00 Welder, etc.
2009-04-16 Vanadium fumes 0 50 0.00 Welder, etc.
2009-04-16 Zinc oxide fumes 0.04 10 0.00 Welder, etc.
2009-04-16 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-04-16 Respirable dust, <.1mg 0 Laborer, Bullgang
2009-04-16 Molybdenum fumes 0 20 0.00 Welder, etc.
2009-04-16 Arsenic fumes 0 1500 0.00 Welder, etc.
2009-04-16 Beryllium fumes 0 6 0.00 Welder, etc.
2009-04-16 Cadmium oxide fumes 0 100 0.00 Welder, etc.
2009-04-16 Chromium, insoluble 0 3 0.00 Welder, etc.
2009-04-16 Cobalt fumes 0 300 0.00 Welder, etc.
2009-04-16 Copper fumes 5.69 300 0.02 Welder, etc.
2009-04-16 Iron oxide fumes 0.75 20 0.04 Welder, etc.
2009-04-16 Lead fumes 0 450 0.00 Welder, etc.
2009-04-16 Magnesium oxide fumes 0.06 20 0.00 Welder, etc.
2009-04-16 Manganese fumes 0.27 5 0.05 Welder, etc.
2009-04-16 Molybdenum fumes 0 20 0.00 Welder, etc.
2009-04-16 Nickel fumes 0 3 0.00 Welder, etc.
2004-10-06 Quartz, respirable, >1% Qtz 0.52 1.98 0.26 Front-end Loader Operator
2004-10-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2004-10-06 Quartz, respirable, >1% Qtz 0.24 0.99 0.24 Crusher Oper/Worker
2002-11-20 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-11-20 Quartz, respirable, >1% Qtz 0.7 2.95 0.24 Front-end Loader Operator
2002-06-04 Quartz, respirable, >1% Qtz 0.2 0.96 0.21 Crusher Oper/Worker
2002-06-04 Quartz, respirable, >1% Qtz 0.25 0.82 0.30 Crusher Oper/Worker
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.

Thun Field Pit 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 Washington, metal and nonmetal mining averaged 2.92 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
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
2019 * 0.00 0.00 0.000
2018 * 18.16 0.00 0.000
2017 * 0.00 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. Puyallup Sand & Gravel 1950 to 2002
  2. Corliss Resources LLC 2003 to 2026
  3. HM Pacific Northwest Inc. 2026 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 13
2025 13
2024 13
2023 14
2022 12
2021 12
2020 9
2019 9
2018 9
2017 9
2016 10
2015 10
2014 11
2013 15
2012 8
2011 10
2010 10
2009 11
2008 14
2007 16
2006 12
2005 13
2004 9
2003 6
2002 9
2001 11
2000 11
Source: MSHA quarterly employment and production, updated weekly.

Thun Field Pit sits in Pierce County, Washington, where the Census mining category is 0.1% 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.
Pierce County, Washington · Population 924,106
0.1%
Mining share of county employment
$96,632
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 6,672 4 0 599.5
2026 Q1 5,741 0 0 0.0
2025 Q4 5,636 9 2 1596.9
2025 Q3 5,797 5 1 862.5
2025 Q2 6,708 0 0 0.0
2025 Q1 6,881 2 0 290.7
2024 Q4 6,881 0 0 0.0
2024 Q3 6,497 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 7,779 11 4 1414.1
2024 Q1 6,605 0 0 0.0
2023 Q4 6,222 2 0 321.4
2023 Q3 6,668 0 0 0.0
2023 Q2 7,367 0 0 0.0
2023 Q1 7,338 0 0 0.0
2022 Q4 6,197 0 0 0.0
2022 Q3 6,792 2 0 294.5
2022 Q2 6,712 2 0 298.0
2022 Q1 6,807 0 0 0.0
2021 Q4 6,950 1 0 143.9
2021 Q3 7,106 1 0 140.7
2021 Q2 5,784 0 0 0.0
2021 Q1 7,217 2 0 277.1
2020 Q4 5,765 0 0 0.0
2020 Q3 5,401 2 0 370.3
2020 Q2 3,495 0 0 0.0
2020 Q1 5,048 5 0 990.5
2019 Q4 4,796 0 0 0.0
2019 Q3 5,562 0 0 0.0
2019 Q2 5,649 3 1 531.1
2019 Q1 4,701 0 0 0.0
2018 Q4 4,676 4 2 855.4
2018 Q3 5,476 0 0 0.0
2018 Q2 6,251 6 1 959.8
2018 Q1 5,628 0 0 0.0
2017 Q4 5,570 3 1 538.6
2017 Q3 5,308 0 0 0.0
2017 Q2 4,860 0 0 0.0
2017 Q1 4,784 2 0 418.1
2016 Q4 6,936 0 0 0.0
2016 Q3 4,748 3 0 631.8
2016 Q2 5,974 3 0 502.2
2016 Q1 6,923 0 0 0.0
2015 Q4 6,199 0 0 0.0
2015 Q3 6,787 2 0 294.7
2015 Q2 6,404 2 0 312.3
2015 Q1 4,951 0 0 0.0
2014 Q4 5,238 4 0 763.7
2014 Q3 5,957 3 1 503.6
2014 Q2 7,369 0 0 0.0
2014 Q1 8,063 0 0 0.0
2013 Q4 4,298 0 0 0.0
2013 Q3 7,932 1 0 126.1
2013 Q2 8,200 4 0 487.8
2013 Q1 5,331 0 0 0.0
2012 Q4 5,136 0 0 0.0
2012 Q3 6,533 0 0 0.0
2012 Q2 3,540 1 0 282.5
2012 Q1 1,931 1 0 517.9
2011 Q4 4,990 0 0 0.0
2011 Q3 5,846 0 0 0.0
2011 Q2 5,543 1 0 180.4
2011 Q1 4,783 0 0 0.0
2010 Q4 5,775 4 0 692.6
2010 Q3 5,362 0 0 0.0
2010 Q2 3,873 5 3 1291.0
2010 Q1 3,972 1 0 251.8
2009 Q4 4,988 0 0 0.0
2009 Q3 5,240 11 7 2099.2
2009 Q2 4,576 3 0 655.6
2009 Q1 6,726 0 0 0.0
2008 Q4 6,725 1 0 148.7
2008 Q3 9,288 0 0 0.0
2008 Q2 7,045 0 0 0.0
2008 Q1 8,470 3 1 354.2
2007 Q4 9,634 0 0 0.0
2007 Q3 11,528 0 0 0.0
2007 Q2 7,623 0 0 0.0
2007 Q1 9,405 0 0 0.0
2006 Q4 7,726 6 1 776.6
2006 Q3 7,828 0 0 0.0
2006 Q2 6,116 3 1 490.5
2006 Q1 7,733 0 0 0.0
2005 Q4 7,748 8 0 1032.5
2005 Q3 8,594 0 0 0.0
2005 Q2 7,496 4 1 533.6
2005 Q1 6,215 0 0 0.0
2004 Q4 4,003 3 0 749.4
2004 Q3 5,691 0 0 0.0
2004 Q2 7,511 7 1 932.0
2004 Q1 4,243 0 0 0.0
2003 Q4 3,588 9 2 2508.4
2003 Q3 3,707 0 0 0.0
2003 Q2 3,851 1 0 259.7
2003 Q1 3,994 0 0 0.0
2002 Q4 4,662 2 0 429.0
2002 Q3 5,352 0 0 0.0
2002 Q2 5,623 2 1 355.7
2002 Q1 4,835 0 0 0.0
2001 Q4 5,657 4 2 707.1
2001 Q3 5,677 0 0 0.0
2001 Q2 5,624 1 0 177.8
2001 Q1 4,672 0 0 0.0
2000 Q4 5,885 0 0 0.0
2000 Q3 6,567 0 0 0.0
2000 Q2 7,182 14 5 1949.3
2000 Q1 6,643 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

18 on file

2023 · 1 incident

October 30, 2023 WA · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
Corliss Resources LLC · Fall to the walkway or working surface

Miner was closing a valve and their hand slipped as they were tightening the valve. Miner lost balance and they attempted to catch themselves as they fell. Miner injured their left elbow when they fell.

2018 · 2 incidents

November 30, 2018 WA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator POWERED HAULAGE
Corliss Resources LLC · Struck by... (Not Elsewhere Classified)

Mud and water dripped into employees face and eyes causing eye to become agitated.

February 6, 2018 WA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Corliss Resources LLC · Struck by falling object

Employee was removing heavy part (u joint) from under loader. Once removed, it slipped from employees hand and fell to the ground pinching their finger between the part and the floor.

2016 · 1 incident

October 25, 2016 WA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech STEPPING OR KNEELING ON OBJECT
Corliss Resources LLC · Struck against stationary object

Rolled ankle on rock on the ground while walking through pit.

2011 · 2 incidents

July 21, 2011 WA · Metal/Non-Metal miner, prospector, nec POWERED HAULAGE
Corliss Resources LLC · Struck against a moving object

No Miners involved. Early morning on 7/21/2011 private vehicle driving on private roads swerved off road, ran through 3 fences and into mine property. Vehicle hit berm at edge of pond. Both driver and passenger were taken from scene by ambulance. Before mine opened for the day. Was immediately reported to MSHA.

July 21, 2011 WA · Metal/Non-Metal miner, prospector, nec POWERED HAULAGE
Corliss Resources LLC · Struck against a moving object

No Miners involved. Early morning on 7/21/2011 private vehicle driving on private roads swerved off road, ran through 3 fences and into mine property. Vehicle hit berm at edge of pond. Both driver and passenger were taken from scene by ambulance. Before mine opened for the day. Was immediately reported to MSHA.

2010 · 1 incident

October 20, 2010 WA · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS
Corliss Resources LLC · Struck by flying object

While removing bearing on the head pulley of the feeder belt a piece of steel splintered off and lacerated employee's left forearm.

2009 · 1 incident

February 9, 2009 WA · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Corliss Resources LLC · Fall onto or against objects

Employee was climbing up to get into a piece of equipment when he slipped down and hit his side on the equipment.

2007 · 1 incident

November 26, 2007 WA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Corliss Resources LLC · Caught in, under or between a moving and a stationary object

While employee was lowering a lift cylinder onto a loader, employee tried to line up the cylinder. His finger got caught/smashed between the cylinder and the loader. No property damage, could lose a portion on his right ring finger.

2006 · 1 incident

November 29, 2006 WA · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Corliss Resources LLC · Struck by falling object

Employee dropped a 4 foot long piece of metal on top of left foot. Did not go to the doctor at the time. Went to doctor the next day, no treatment given. Continued to hurt, went back to doctor, off work from 12/3/06 to 12/6/06, back to work 12-6-06 went on light duty til 2/6/06, then off work til 2/26/07, then back full time

2005 · 2 incidents

June 6, 2005 WA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Corliss Resources LLC · Fall from machine

Employee was dismounting a forklift when he slipped & grabbed the roll bar. Wrenched his left shoulder. Initially it was just reported as an incident. Didn't seek medical attention until 6/27/05(from 2200602400092 2/5'd). Returned to work & then went off 7/18/05 with same injury - went for surgery. Returned 1/9/06

April 21, 2005 WA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Corliss Resources LLC · Fall to the walkway or working surface

EE WAS WALKING UNDER A CONVEYOR WHILE PAINTING IT. HE STEPPED ON SOME UNEVEN GROUND AND FELL, HURTING HIS ANKLE.

2001 · 2 incidents

June 24, 2001 WA · Metal/Non-Metal mine manager, mine foreman, mine owner HANDLING OF MATERIALS
Puyallup Sand & Gravel · Struck by... (Not Elsewhere Classified)

CARRYING MATERIAL WITH CO-WORKER. CO-WORKER SLIPPED, JERKING MATERIAL OUT OF HAND.

2000 · 2 incidents

June 22, 2000 WA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Puyallup Sand & Gravel · Struck by... (Not Elsewhere Classified)

HITTING STEEL WEDGE WITH SLEDGE HAMMER. PIECE BROKE OFF, HITTING EYE. WEARING GOGGLES AT TIME.

1999 · 1 incident

June 28, 1999 WA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Puyallup Sand & Gravel · Over-exertion (Not Elsewhere Classified)

ROLLED ANKLE STEPPING DOWN FROM CATWALK.

1990 · 1 incident

September 14, 1990 WA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Puyallup Sand & Gravel · Over-exertion in lifting objects

INJURED PERSON WAS ATTEMPTINE TO INSTALL 120 BL. BELT OVERHEAD. WEIGHT BECAME EXCESSIVE EINEL WHILE TURNING AWKWARELY, INJURED BACK.