Northeast Wisconsin
Zone 4
Transmission system characteristics in Zone 4
ATC delivers power in Zone 4 with various transmission facilities including:
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Four 345-kV lines extending from the Point Beach Nuclear Plant,
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Two 345-kV lines extending from the Edgewater Power Plant,
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Four 345-kV lines connecting the Gardner Park, Werner West, Morgan, and Plains Substations,
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Two 345-kV lines from North Appleton to Werner West and Fitzgerald,
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Three 345-kV lines connecting South Fond du Lac Substation to the Columbia, Edgewater and Fitzgerald Substations, and
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A 138-kV network in the Fox River Valley/Green Bay area.
Transmission system limitations in Zone 4
In our analysis of Zone 4, we continue to monitor potential high voltages in the Outagamie and Calumet counties and impending low voltages in Brown County. In addition, other ongoing studies have identified several voltage and thermal limitations. The most severe limitations occur during both peak and off‑peak periods.
Electric system overview
Increases expected in population, employment – Population in Zone 4 is projected to grow 0.7 percent annually between now and 2024. Brown County is expected to realize the largest increase in population. Employment is projected to grow 1.1 percent annually in the same time period, with the largest increase projected in Brown County.
Electricity usage growing
Peak electric demand typically occurs during the summer months, although the northern portion of Zone 4 typically experiences nearly equal summer and winter peaks. Paper mills and foundries in the Green Bay and Appleton metropolitan areas are some of the largest electricity users in the zone.
Electric load is forecasted to grow at approximately 0.5 percent annually through 2025. Also, locally generated electricity is declining in the area with smaller, coal-fired generators most at risk. This includes generation owned by industries, municipalities and utilities.
Transmission projects in Zone 4
The most notable planned, proposed and provisional network projects and asset renewal projects in Zone 4, along with their projected year of completion and the factors driving the need for the projects, are listed below.
Zone 4 includes the counties of:
- Brown , WI
- Calumet , WI
- Dodge (NE) , WI
- Door , WI
- Fond Du Lac (E) , WI
- Kewaunee , WI
- Manitowoc , WI
- Marinette (S) , WI
- Menominee , WI
- Menominee (S) , MI
- Oconto , WI
- Outagamie , WI
- Shawano (E) , WI
- Sheboygan , WI
- Winnebago (E) , WI
Zone 4 Planned Projects
| Project Description | In-service year | Need driver |
|---|---|---|
| Pulliam-Glory Road 138-kV line conversion | 2016 | Overloads and low voltages |
| Iron Foundry 138/69‑kV Substation construction and Glenview‑Iron Foundry 69‑kV line extension | 2016 | T‑D interconnection |
| Bay Lake: North Appleton-Morgan 345‑kV and 138‑kV line construction | 2019 | Overloads and low voltages |
| Creekview Substation: 138-kV line construction to serve T‑D interconnection | 2017 | T‑D interconnection 2017 |
| Branch River 345‑kV Substation construction | 2018 | Accommodate new generation |
Zone 4 Proposed Projects
| Project Description | In-service year | Need driver |
|---|---|---|
| Ogden St.-Bayshore 69-kV line construction | 2018 | Provide network service |
Zone 4 Asset Renewal Projects
| Project Description | In-service year | Need driver |
|---|---|---|
| Dyckesville-Sawyer 69-kV line rebuild | 2016 | Condition and performance |
| North Appleton-Butte des Morts 138-kV line rebuild | 2017 | Condition and performance |
| Finger Road-Canal 69-kV line rebuild | 2019 | Condition and performance |