Commonwealth Edison Co. v. City of Warrenville

The plaintiff, Commonwealth Edison Company (ComEd), brought this action seeking to enjoin the defendant, the City of Warrenville (Warrenville), from using its zoning power to halt a project involving the construction of a new transmission line. The circuit court of Du Page County held that Warrenville’s authority to halt or regulate the project through its zoning ordinance was preempted. The court therefore permanently enjoined Warrenville from interfering with the project. Warrenville appeals.

The record reveals that ComEd is a public utility regulated by the Illinois Commerce Commission…