The estimated construction cost is $50 million, and the company expects to complete the project by summer 2010. Two sets of PECO electric transmission lines intersect beneath the vacant parcel. The selection followed a review of several options. Proximity to the existing lines, accessibility to the site and the impact to surrounding residents are among the factors that led to this choice.

"After months of public involvement and getting extensive input, we believe that this property is the best option and balances the needs of local residents and the company," says Craig Adams, PECO's SVP and COO, in a statement. "I also want to convey our appreciation for the patience exhibited by the community as we moved through this process."

The substation will convert higher voltage power from an existing line into lower voltage power so it can be rerouted through the regional network more efficiently and alleviate congestion with power flows on the regional grid. The design is not yet complete, but a PECO spokesman tells GlobeSt.com, "it will be an open structure, strictly for housing electrical equipment." He says the facility, including security features, will occupy the full nine acres.