Commonwealth Edison (ComEd)

Stories

Illinois regulators approve ComEd's underground transmission ring near O'Hare

Project proponent and builder

ComEd won Illinois Commerce Commission approval on Oct. 22 to bury four high-voltage transmission lines and add a substation near O'Hare. The $319 million set forms a ring linking three substations in Elk Grove Village, Wood Dale and Bensenville, so operators can reroute power when a line fails.

Updated Oct 25

FERC rejects ComEd's cancellation of PowerHouse Hillwood data center contract

Rule Changes

As of September 2026: Attempted to cancel transmission security agreement; dispute now in federal court

The Federal Energy Regulatory Commission (FERC) on September 22, 2026, rejected Commonwealth Edison's (ComEd) attempt to cancel a transmission security agreement with PowerHouse Hillwood Holding, the developer behind a 1.8-gigawatt, $20-billion data center planned for Joliet, Illinois. The agency declined to take jurisdiction over the contract dispute, saying the U.S. District Court for the Northern District of Illinois is the right venue to resolve it.

Updated Sep 23