Mining Incidents
Search Operators Mines Alerts Research Controllers Fatalgrams About
English Español
← Back to search

Wash Plant 2: 20 MSHA citations Metal/Non-Metal

Controlled by Knife River Corporation
Boise, Ada County, ID  ·  Intermittent
MSHA Mine ID: 1002090

Wash Plant 2 has $4K in proposed MSHA penalties and $151 outstanding across 0 contested dockets, plus health sampling and the full incident record.

Watch this mine

Email me when a new MSHA incident is filed at Wash Plant 2.

Fatalities
0
Total incidents
2
Years on record
2009–2022
Latest incident
Apr 2022
Compliance record
MSHA citations since 2008
20
citations
2
significant & substantial
$3,913
proposed penalties
$3,762
paid to date
96% of proposed penalties paid to date, a $151 gap.
Source: MSHA violations data, updated weekly.
See Knife River Corporation Mountain West's full MSHA compliance history →
Inspection activity
MSHA inspections since 2006
19
inspections on record
152
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: 152 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Wash Plant 2 has $4K in proposed MSHA penalties and $151 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$151
outstanding
20 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-03-24.
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.
10.0%
significant & substantial
5.0%
high negligence or reckless
10.0%
reasonably likely or greater
75.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 25.0% low, 70.0% 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: 2017-08-09, 9 years ago
4
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg4
Show the individual readings (4)
Date Contaminant Concentration Limit Conc / limit Occupation
2017-08-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2017-08-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-11-10 Respirable dust, <.1mg 0 Washer Operator
2009-11-10 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.
Ownership history
  1. Knife River 2006 to 2009
  2. Knife River Southern Idaho Division 2010 to 2023
  3. Knife River Corporation Mountain West 2023 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 4
2025 3
2024 2
2023 8
2022 7
2021 0
2020 2
2019 2
2018 2
2017 2
2011 0
2010 1
2009 3
2008 1
2007 1
2006 2
Source: MSHA quarterly employment and production, updated weekly.

Wash Plant 2 sits in Ada County, Idaho, 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.
Ada County, Idaho · Population 508,052
0.1%
Mining share of county employment
$88,907
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 2,292 0 0 0.0
2026 Q1 1,406 1 0 711.2
2025 Q4 1,617 0 0 0.0
2025 Q3 2,409 0 0 0.0
2025 Q2 1,935 0 0 0.0
2025 Q1 32 0 0 0.0
2024 Q4 1,176 1 0 850.3
2024 Q3 586 0 0 0.0
Show 47 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 1,621 0 0 0.0
2024 Q1 353 6 0 16997.2
2023 Q4 1,203 0 0 0.0
2023 Q3 2,737 0 0 0.0
2023 Q2 2,483 0 0 0.0
2023 Q1 1,763 0 0 0.0
2022 Q4 2,768 0 0 0.0
2022 Q3 3,064 0 0 0.0
2022 Q2 2,963 0 0 0.0
2021 Q2 0 0 0
2021 Q1 0 0 0
2020 Q4 0 0 0
2020 Q3 2,102 0 0 0.0
2020 Q2 893 0 0 0.0
2020 Q1 0 0 0
2019 Q4 143 1 0 6993.0
2019 Q3 1,341 0 0 0.0
2019 Q2 433 0 0 0.0
2019 Q1 0 0 0
2018 Q4 409 0 0 0.0
2018 Q3 1,263 0 0 0.0
2018 Q2 0 0 0
2018 Q1 3,126 0 0 0.0
2017 Q4 0 0 0
2017 Q3 1,602 1 0 624.2
2017 Q2 974 0 0 0.0
2011 Q2 0 0 0
2011 Q1 0 0 0
2010 Q4 0 0 0
2010 Q3 0 0 0
2010 Q2 595 1 0 1680.7
2010 Q1 1,191 0 0 0.0
2009 Q4 1,115 6 1 5381.2
2009 Q3 1,954 2 0 1023.5
2009 Q2 2,627 0 0 0.0
2009 Q1 1,796 0 0 0.0
2008 Q4 693 1 1 1443.0
2008 Q3 662 0 0 0.0
2008 Q2 554 0 0 0.0
2008 Q1 418 0 0 0.0
2007 Q4 422 0 0 0.0
2007 Q3 797 0 0 0.0
2007 Q2 888 0 0 0.0
2007 Q1 200 0 0 0.0
2006 Q4 3,152 0 0 0.0
2006 Q3 60 0 0 0.0
2006 Q2 0 0 0
No fatalities recorded at this mine.

Reportable incidents

2 on file

2022 · 1 incident

April 13, 2022 ID · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Knife River Southern Idaho Division · Struck by flying object

Miner was working on a conveyor and cleared the dust off the are they were about to work on and got dust in their eye.

2009 · 1 incident

April 24, 2009 ID · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Knife River · Caught in, under or between a moving and a stationary object

Hooking up chain to loader to pull manlift which was stuck, loader operator took off to soon, caught finger in chain.