Bayport – Pioneer Rebuild Project
Overview
Approximately 21 miles of 69,000-volt transmission line north of Green Bay, Wis., needs to be rebuilt and upgraded to 138-kV to serve the electric load in the area effectively and reliably. The 1910s-vintage lattice structures and wires have reached the end of their life cycle and will be replaced between the Bayport Substation in Brown County and the Pioneer Substation in Oconto County.
The project includes:
- Replacing the transmission structures between Bayport and Pioneer substations with poles that support two 138-kV circuits,
- Replacing the existing wires and installing a second set of wires, both to be operated at 138-kV, and
- Making upgrades at the Bayport, Pioneer, Pulliam, Sobieski and Suamico substations.
The estimated $47 million project requires approval by the Public Service Commission of Wisconsin, which will conduct a review with public input. Additional information, including details of our regulatory filing, can be found at psc.wi.gov under docket number 137-CE-190.
Need for the project
These transmission lines were installed in the 1910s and have reached the end of their life cycle. Replacing and upgrading the lines to 138-kV will resolve age, technology, maintenance and related issues, and will help meet the electric needs of customers in the area effectively and reliably.
| Area benefited: | Northeastern Wisconsin |
| Line length: | Approximately 21 miles |
| Voltage: | 138,000 volts |
| Estimated cost: | Approximately $47 million |
| End points: | The Bayport Substation in Brown County and the Pioneer Substation in Oconto County |
| PSC Docket ID: | 137-CE-190 |
| File regulatory application with PSCW | May 2019 |
| Regulatory review | Summer/fall 2019 |
| Anticipated approval | Late 2019 |
| Detailed engineering/design | Late 2019/early 2020 |
| Begin construction activities | Late 2020 |
| In-service date | June 2022 |