Northeast Wisconsin
Zone 4

Transmission system limitations in Zone 4

In our analysis of Zone 4, we found impending overloads in Brown County. In addition, other ongoing studies have identified several voltage and overload limitations. The most severe limitations are expected to occur during both peak and off‑peak periods.

Several area projects are related to the underlying condition and performance of assets in Zone 4.

Electric system overview

Increases expected in population, employment –  Population in Zone 4 is projected to grow at 0.4 percent annually between now and 2028. Employment is projected to grow at 0.8 percent annually between now and 2028. Brown County is projected to realize the largest total increase in population and employment. Calumet County is projected to have the highest annual growth rates in population and employment at 0.8% and 1.3%, respectively.

Electricity usage

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 and around 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 0.2 percent annually through 2029. 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 (S) , MI
  • Menominee , WI
  • Oconto , WI
  • Outagamie , WI
  • Shawano (E) , WI
  • Sheboygan , WI
  • Winnebago (E) , WI

Zone 4 Planned Projects

Project DescriptionProject #In-service yearNeed driver
Caldron Falls–Goodman 69-kV line (J-88), rebuild12020Condition and performance
Cedar Ridge Wind Generation–Mullet River 138-kV line (X-97), rebuild22020Condition and performance
Finger Road–Canal 69-kV line (J-10), rebuild32020Condition and performance
Ogden St. SS, network project: Ogden St.–Bayshore 69‑kV line construction42020T-D interconnection
Packaging SS, new DIC52020T-D interconnection
Redwood–First Ave. 69-kV line (T-46), replace the submarine cable62021Condition and performance
Butte Des Morts–Sunset Point (40321, 80952, A-79, MCRG21) 138-kV line, rebuild72021Condition and performance
Edgewater SS, 345‑kV bus reconfiguration82022Condition and performance
New Holstein–Custer 69-kV line (P-68), rebuild92022Condition and performance
Danz Ave.
SW STA–University (WPS) 69-kV line (O-15), underground rebuild & OPGW
102023Condition and performance
Finger Road SW STA–Wesmark- Rapids, 69-kV line (FIRY11/R-44), rebuild112023/2024Condition and performance
Oak St–Hwy V 69-kV line (Z-26), rebuild122025Condition and performance

Zone 4 Proposed Projects

Project DescriptionProject #In-service yearNeed driver
Bayport SS–Pioneer SS 138-kV line rebuild as a double-circuit132021Condition and performance, T-D interconnection
Edgewater SS–Lodestar SS 138-kV (X-48/Y-31), underground cable rebuild142022Condition and performance
Pioneer SS–Crivitz SS 138-kV line (E-83/B-2), retire 69-kV line and reconfigure load to 138-kV line152022Condition and performance, T-D interconnection
Proposed Projects

Zone 4 Provisional Projects

Project DescriptionProject #In-service yearNeed driver