North Central Wisconsin
Zone 1

Transmission system limitations in Zone 1

Zone 1 has a few key system performance issues. High voltages may occur in the northern portion of the zone under system intact as well as contingent system conditions. Potential overloads and low voltages that are a result of multiple contingency planning events will continue to be monitored.  The most severe limitations are expected during both peak and off-peak periods.

Electricity usage

Peak electric demand typically occurs during the summer months, with some winter peaks appearing in the northern portion of the zone. Primary electricity users in Zone 1 include several large paper mills and food processing plants.

Electric load is forecasted to grow approximately 0.4 percent annually through 2030.

Transmission projects in Zone 1

The most notable planned, proposed and provisional network/asset-renewal projects in Zone 1, are listed below – along with their projected year of completion and the factors driving the need for the projects.

Zone 1 includes the counties of:
  • Adams , Wis.
  • Fond du Lac (NW) , Wis.
  • Forest (SW) , Wis.
  • Green Lake , Wis.
  • Juneau , Wis.
  • Langlade , Wis.
  • Lincoln , Wis.
  • Marathon , Wis.
  • Marquette , Wis.
  • Monroe (E) , Wis.
  • Oneida , Wis.
  • Portage , Wis.
  • Shawano (W) , Wis.
  • Vernon (E) , Wis.
  • Vilas (S) , Wis.
  • Washara , Wis.
  • Waupaca , Wis.
  • Winnebago (W) , Wis.
  • Wood , Wis.

Zone 1 Planned Projects

Project DescriptionProject #In-service yearNeed driver
Waupaca Area Energy Storage Project12022Operation Flexibility
J986 7 Mile Creek SS, Generator Interconnection Facilities and Network Upgrades22022G-T Interconnection
Wautoma–Chaffee Creek 69‑kV line (Y‑49) rebuild32023Asset Renewal
Chaffee Creek–Lincoln Pump Station 69‑kV line (Y‑18) rebuild42023/2024Asset Renewal
J1002 Wautoma SS Network Upgrades and Interconnection Facilities52023G-T Interconnection
Petenwell–Saratoga (X-43), Line Rebuild62023Reliability, Economic
Rocky Run Transformer Replacement72023Reliability
J732 Superior SS Generator Interconnection Facilities and Network Upgrades82023G-T Interconnection
Petenwell–Council Creek (X-40), OPGW installation92024Communication
McKenna–Castle Rock 69-kV line (Y-47) rebuild102025Asset Renewal

Zone 1 Proposed Projects

Project DescriptionProject #In-service yearNeed driver

Zone 1 Provisional Projects

Project DescriptionIn-service yearNeed driver