Commonwealth Edison (ComEd) plans to build a 57-mile, 345-kV transmission project across northern Illinois.
The Grand Prairie Gateway project will be the third west-east line to cross its service territory and will connect the company’s existing Byron and Wayne substations, traversing the counties of Ogle, DeKalb and DuPage, ComEd said in a statement.
Most of the land the line will cross will be agricultural, a spokesperson for the company told TransmissionHub on June 18.
The project is estimated to cost $109.6m, according to PJM interconnection’s 2012 regional transmission expansion plan (RTEP).
The line is designed to reduce system congestion. PJM identified the line as a solution for resolving auction revenue rights (ARR) infeasibility constraints in ComEd’s zone. ARRs are the mechanism by which proceeds from the annual financial transmission rights auction are allocated.
“PJM’s Stage 1A 10-Year ARR feasibility comparison of solution options as originally proposed revealed that the Byron-Wayne 345 kV project solved all identified ARR insufficiency transmission constraints in western PJM,” the RTO said in the RTEP.
The project also alleviates constraints on market-to-market flowgates near the boundary with the Midcontinent ISO (MISO), PJM said.
PJM’s board of directors approved the project on Oct. 16, 2012, according to the RTEP.
ComEd will hold a series of open houses in July in Ogle, DeKalb and DuPage counties and will identify a primary and at least one alternate route, the company said.
The company will file an application for approval of the project with the Illinois Commerce Commission before the end of 2013. The project will enter service, if approved, in June 2017.
ComEd is a subsidiary of Exelon (NYSE:EXC).