The project, which will serve multiple reliability functions, involves constructing approximately 35-55 miles (depending on route) of new 345-kilovolt transmission line to connect the Rockdale Substation located near Christiana with the West Middleton Substation. Both substations will require some equipment upgrades to support this new line. Rendering: Beltline with appearance of poles.
NEW! News release Oct. 15, 2007: Application filed with PSC
Communities affected: Christiana, West Middleton and other communities in southern Dane County may be affected by the line route; all of Dane County and southern Wisconsin will benefit from this project.
Length of line: 32 - 55 miles depending on final route.
End points: Rockdale Substation near Christiana, and West Middleton Substation.
Voltage: 345 kilovolts
Type of pole: Steel single pole Sample pole photos
Cost: Depending on route - $213 million to $250 million More details on costs
Map: Proposed route options (pdf)
Maps: Proposed routes through cities, villages, and towns
Animated map of routes (Flash file)
Planning & construction process
Determining a route
Commonly asked questions
The role of the PSC
Sample pole photos
Pole Height Comparison
Undergrounding options
Report: Use of Alternative Conductors on existing transmission lines to eliminate this project
Public open houses on study area: July 2005 Environmental analysis: Summer 2005
Open house for public to comment on preliminary corridors: November 2005
Evaluation to finalize routes: Winter 2005
Open house on possible route options: August 2006
Ongoing studies: Winter/Spring 2007
Annoucement of final route options: Aug. 2007
Final open house to present final route options: Aug. 2007
Regulatory application: October 15, 2007
View application under Case Management No. 137-CE-147
Review by PSC: October 2007 through 2008
Construction start: Late 2009
Anticipated in-service date: June 2013
*Subject to changes
**ATC is required to submit at least two route alternates when it submits a construction application to the PSC. Learn more about regulatory review.
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