ALLEGHENY TRAIL
In June 2006, the PJM board approved a five-year plan designed to maintain the reliability of the transmission grid in the PJM region, including the Allegheny Power transmission zone. The plan includes construction of a new 500-kilovolt transmission line, new 138-kV transmission lines and related substation facilities.
The Trans-Allegheny Interstate Line (TrAIL) will extend from Southwestern Pennsylvania (37 miles) to West Virginia (114 miles) to Northern Virginia (28 miles). Dominion Virginia Power will build the line from an interconnection point east of Allegheny’s Meadow Brook substation near Middletown, Va. to its Loudon Substation. About 36 miles of the 500-kV line in Southwestern Pennsylvania are needed to serve local demand in Greene and Washington counties.