Portable Plant #5: 5 MSHA citations Metal/Non-Metal
Bjoin Limestone Inc.
· Surface
Controlled by
Kristopher P Bjoin; Shaun M Bjoin; Jonathan M Bjoin
MSHA Mine ID: 4703788
Portable Plant #5 has $837 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
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2017
5
citations
1
significant & substantial
$837
proposed penalties
$837
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2016
12
inspections on record
86
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: 86 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Portable Plant #5 has $837 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.$837
proposed penalties
$837
current assessed
$837
paid to date
$0
outstanding
5 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2023-05-24.
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.20.0%
significant & substantial
0.0%
high negligence or reckless
20.0%
reasonably likely or greater
60.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 80.0% low, 20.0% moderate, 0.0% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Ownership history
- Bjoin Limestone Inc. 2016 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 1 |
| 2025 | 2 |
| 2024 | 2 |
| 2023 | 2 |
| 2021 | 0 |
| 2020 | 3 |
| 2019 | 2 |
| 2018 | 2 |
| 2017 | 2 |
| 2016 | 2 |
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant #5 sits in Rock County, Wisconsin, 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.Rock County, Wisconsin · Population 163,944
0.1%
Mining share of county employment
$74,390
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 | 0 | 0 | 0 | |
| 2026 Q1 | 236 | 0 | 0 | 0.0 |
| 2025 Q4 | 384 | 0 | 0 | 0.0 |
| 2025 Q3 | 416 | 0 | 0 | 0.0 |
| 2025 Q2 | 26 | 0 | 0 | 0.0 |
| 2025 Q1 | 938 | 0 | 0 | 0.0 |
| 2024 Q4 | 852 | 0 | 0 | 0.0 |
| 2023 Q2 | 774 | 2 | 1 | 2584.0 |
Show 17 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2021 Q1 | 0 | 0 | 0 | |
| 2020 Q3 | 672 | 0 | 0 | 0.0 |
| 2020 Q2 | 243 | 0 | 0 | 0.0 |
| 2020 Q1 | 171 | 0 | 0 | 0.0 |
| 2019 Q4 | 371 | 0 | 0 | 0.0 |
| 2019 Q3 | 1,274 | 0 | 0 | 0.0 |
| 2019 Q2 | 1,055 | 0 | 0 | 0.0 |
| 2019 Q1 | 68 | 0 | 0 | 0.0 |
| 2018 Q4 | 943 | 0 | 0 | 0.0 |
| 2018 Q3 | 1,329 | 0 | 0 | 0.0 |
| 2018 Q2 | 1,181 | 0 | 0 | 0.0 |
| 2018 Q1 | 532 | 0 | 0 | 0.0 |
| 2017 Q3 | 1,497 | 0 | 0 | 0.0 |
| 2017 Q2 | 843 | 3 | 0 | 3558.7 |
| 2017 Q1 | 680 | 0 | 0 | 0.0 |
| 2016 Q4 | 444 | 0 | 0 | 0.0 |
| 2016 Q3 | 523 | 0 | 0 | 0.0 |
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.