Key Takeaway
Portable Unit #2 is a active surface mine producing Stone, located in Janesville, Rock County, WI. It has 89 violations on record (12 S&S) and $21K in proposed penalties. Operated by Bjoin Limestone Inc.
Portable Unit #2
Operator: Bjoin Limestone Inc
Controller: Kristopher P Bjoin; Shaun M Bjoin; Jonathan M Bjoin
Location: Janesville, Rock County, WI
Employees: 4
Recent Violations
View all 89 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/26/2026 | 56.15005 | S&S | LowNegligence | $0 |
| 02/26/2026 | 56.14206(b) | S&S | LowNegligence | $0 |
| 06/13/2025 | 56.12004 | Non-S&S | ModNegligence | $151 |
| 03/11/2025 | 56.11003 | Non-S&S | ModNegligence | $151 |
| 03/11/2025 | 56.12008 | Non-S&S | ModNegligence | $151 |
| 08/07/2024 | 56.12004 | Non-S&S | LowNegligence | $147 |
| 03/20/2024 | 56.14206(b) | Non-S&S | ModNegligence | $147 |
| 03/20/2024 | 56.14107(a) | Non-S&S | HighNegligence | $147 |
| 06/14/2023 | 56.14100(c) | S&S | ModNegligence | $143 |
| 10/17/2022 | 56.12004 | Non-S&S | ModNegligence | $133 |
| 11/17/2021 | 56.12004 | Non-S&S | LowNegligence | $125 |
| 03/04/2021 | 56.12004 | Non-S&S | LowNegligence | $125 |
| 03/04/2021 | 56.3200 | Non-S&S | ModNegligence | $125 |
| 03/03/2020 | 56.14132(a) | Non-S&S | ModNegligence | $123 |
| 06/28/2019 | 56.14107(a) | Non-S&S | ModNegligence | $121 |
| 04/24/2018 | 56.15004 | S&S | LowNegligence | $118 |
| 04/24/2018 | 56.4104(b) | Non-S&S | ModNegligence | $118 |
| 04/24/2018 | 56.14132(a) | Non-S&S | ModNegligence | $118 |
| 04/05/2017 | 56.12004 | Non-S&S | ModNegligence | $116 |
| 04/05/2017 | 56.12008 | Non-S&S | LowNegligence | $116 |
Accidents & Injuries
View all 1 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 07/15/2011 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 55 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/26/2026 | 5.50 | 1 | |
| 06/13/2025 | 06/18/2025 | 8.00 | 1 |
| 03/11/2025 | 03/12/2025 | 12.25 | 1 |
| 08/07/2024 | 08/07/2024 | 8.00 | 1 |
| 03/19/2024 | 03/21/2024 | 11.00 | 1 |
| 06/14/2023 | 06/14/2023 | 6.50 | 1 |
| 10/17/2022 | 10/18/2022 | 7.75 | 1 |
| 06/13/2022 | 06/15/2022 | 3.00 | 1 |
| 11/15/2021 | 11/18/2021 | 13.25 | 1 |
| 06/25/2021 | 06/25/2021 | 8.00 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Portable Unit #2 have?
Portable Unit #2 has 89 MSHA violations on record, of which 12 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $21K.
What type of mine is Portable Unit #2?
Portable Unit #2 is a Surface mine producing Stone, located in Janesville, Rock County, WI. It currently has 4 employees.
Has anyone been injured or killed at Portable Unit #2?
According to MSHA records, Portable Unit #2 has 1 reported accident/injury records and 0 fatalities on file.
Who operates Portable Unit #2?
Portable Unit #2 is operated by Bjoin Limestone Inc and controlled by Kristopher P Bjoin; Shaun M Bjoin; Jonathan M Bjoin. MSHA Mine ID: 4703089.