American Transmission Co. projects

Project website for a Wisconsin-based company that owns and operates the high-voltage electric transmission system that powers communities in portions of the Upper Midwest.

ATC converted about 73 miles of existing lines between Lakota Road and Quinnesec, Mich., from 69 kilovolts to 138 kilovolts. The upgraded lines were placed in service in March 2010.

The electric transmission infrastructure serving northern Wisconsin and the western Upper Peninsula of Michigan needed reinforcement due to significant growth in the Rhinelander/Eagle River area, which resulted in an overloaded system vulnerable to interruptions and even blackouts under severe conditions. The lines to the east that connect northern Wisconsin and the Upper Peninsula were also among the most severely constrained in the ATC system, limiting our ability to move power in and out of the Upper Peninsula.

Project at a Glance
Area benefited:Conover and Florence, Wis.; Iron River and Quinnesec, Mich.; improved reliability will benefit northern Wisconsin and the western areas of the Upper Peninsula
Line length:73 miles of existing transmission line
Voltage:Conover-Plains upgrade from 69-kilovolts to 138-kilovolts
End points:Conover Substation to Plains Substation in Quinnesec
Project status:Construction began February 2008; placed in service March 2010
File construction application to PSC:Nov. 2005
Regulatory review and public comment:Winter 2005
Receive PSC decision:Nov. 2006
Begin construction:Jan. 2008 (Conover-Plains)
In-service date:March 2010 (Conover-Plains)