Southeast Wisconsin
Zone 5

Transmission system limitations in Zone 5

A significant transmission system performance challenge in Zone 5 involves heavy energy market flows through the zone, resulting in potential high post-contingency line loadings.

Electricity usage

Peak electric demand typically occurs during the summer months. Large industrial loads in the Milwaukee metropolitan area are among the largest electricity users in the zone. 

Electric load is forecasted to grow approximately 0.3 percent annually through 2032. 

Transmission projects in Zone 5

The most notable planned, proposed and provisional network/asset renewal projects in Zone 5 are listed below along with their projected year of completion and the factors driving the need for the projects.

Zone 5 includes the counties of:
  • Kenosha , Wis.
  • Milwaukee , Wis.
  • Ozaukee , Wis.
  • Racine , Wis.
  • Washington , Wis.
  • Waukesha , Wis.

Zone 5 Planned Projects

Project DescriptionProject #In-service yearNeed driver
J850/J878 MPFCA East Paris New Substation12022G-T interconnection
Summit–Cooney 138-kV line (6431), rebuild22023Condition and Performance
Arcadian SS, power transformer and control house replacement and asset renewal32025Condition and Performance, Reliability
Lincoln - 43rd Street Terminal 138 kV (5053), Replace with double circuit duct bank and XLPE cable 42024Condition and Performance
Everett GIS Asset Renewal 52025Condition and Performance
Oak Creek, Racine SS and Remote Ends, Control Buildings and Relaying Asset Renewal 62025Condition and Performance
Port Washington – Saukville 138 kV (X-132/X-133) partial rebuild 72025Condition and Performance, Reliability

Zone 5 Proposed Projects

Project DescriptionProject #In-service yearNeed driver
Granville SS, Control House and Relay Replacement and Asset Renewal 82025Condition and Performance
Norwich - Harbor 138kV, (893K11), underground line replacement 92025Condition and Performance
WisDOT I-94 Stadium Group of Projects 102026Condition and Performance

Zone 5 Provisional Projects

Project DescriptionProject #In-service yearNeed driver
Milwaukee Area Reactive Power Project 112026Reliability