PORTABLE UNIT #4 Metal/Non-Metal
BJOIN LIMESTONE INC.
· Surface
Controlled by
Kristopher P Bjoin; Shaun M Bjoin; Jonathan M Bjoin
JANESVILLE,
Rock County,
WI
·
Active
MSHA Mine ID: 4703709
PORTABLE UNIT #4 has $2K 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 2014
14
citations
2
significant & substantial
$1,782
proposed penalties
$1,782
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2014
16
inspections on record
157
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: 157 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 UNIT #4 has $2K 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.$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
14 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2021-01-27.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
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 |
|---|---|---|---|---|
| 2025 Q4 | 1,123 | 0 | 0 | 0.0 |
| 2025 Q3 | 1,572 | 0 | 0 | 0.0 |
| 2025 Q2 | 1,498 | 0 | 0 | 0.0 |
| 2025 Q1 | 1,316 | 0 | 0 | 0.0 |
| 2024 Q4 | 1,182 | 0 | 0 | 0.0 |
| 2024 Q3 | 1,437 | 0 | 0 | 0.0 |
| 2024 Q2 | 1,192 | 0 | 0 | 0.0 |
| 2024 Q1 | 822 | 0 | 0 | 0.0 |
Show 38 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2023 Q4 | 1,061 | 0 | 0 | 0.0 |
| 2023 Q3 | 1,432 | 0 | 0 | 0.0 |
| 2023 Q2 | 1,394 | 0 | 0 | 0.0 |
| 2023 Q1 | 1,016 | 0 | 0 | 0.0 |
| 2022 Q4 | 1,381 | 0 | 0 | 0.0 |
| 2022 Q3 | 1,412 | 0 | 0 | 0.0 |
| 2022 Q2 | 1,157 | 0 | 0 | 0.0 |
| 2022 Q1 | 263 | 0 | 0 | 0.0 |
| 2021 Q4 | 1,253 | 0 | 0 | 0.0 |
| 2021 Q3 | 1,117 | 0 | 0 | 0.0 |
| 2021 Q2 | 1,507 | 0 | 0 | 0.0 |
| 2021 Q1 | 1,064 | 1 | 0 | 939.8 |
| 2020 Q4 | 1,043 | 0 | 0 | 0.0 |
| 2020 Q3 | 1,398 | 0 | 0 | 0.0 |
| 2020 Q2 | 1,822 | 0 | 0 | 0.0 |
| 2020 Q1 | 560 | 4 | 0 | 7142.9 |
| 2019 Q4 | 880 | 0 | 0 | 0.0 |
| 2019 Q3 | 1,184 | 1 | 0 | 844.6 |
| 2019 Q2 | 1,419 | 0 | 0 | 0.0 |
| 2019 Q1 | 0 | 0 | 0 | |
| 2018 Q4 | 541 | 0 | 0 | 0.0 |
| 2018 Q3 | 1,411 | 0 | 0 | 0.0 |
| 2018 Q2 | 1,346 | 2 | 0 | 1485.9 |
| 2018 Q1 | 906 | 0 | 0 | 0.0 |
| 2017 Q4 | 2,290 | 0 | 0 | 0.0 |
| 2017 Q3 | 2,433 | 0 | 0 | 0.0 |
| 2017 Q2 | 1,654 | 3 | 0 | 1813.8 |
| 2017 Q1 | 205 | 0 | 0 | 0.0 |
| 2016 Q4 | 943 | 0 | 0 | 0.0 |
| 2016 Q3 | 1,530 | 0 | 0 | 0.0 |
| 2016 Q2 | 1,311 | 0 | 0 | 0.0 |
| 2016 Q1 | 337 | 0 | 0 | 0.0 |
| 2015 Q4 | 1,374 | 0 | 0 | 0.0 |
| 2015 Q2 | 1,694 | 1 | 1 | 590.3 |
| 2015 Q1 | 0 | 0 | 0 | |
| 2014 Q4 | 1,327 | 0 | 0 | 0.0 |
| 2014 Q3 | 2,294 | 0 | 0 | 0.0 |
| 2014 Q2 | 1,596 | 2 | 1 | 1253.1 |
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.
For insurers, brokers, and safety consultants
The full compliance file on PORTABLE UNIT #4
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.