You remember Project Mountaineer — the dream of expanding coal-fired electrical generation in the Ohio Valley and shipping it to the East Coast via massive new transmission lines.
Project Mountaineer was the first child of the October 1, 2004, marriage of AEP and PJM.
They don’t call it that anymore, but the basic “coal-by-wire” concept remains intact. Each year, PJM publishes a new version of its Regional Transmission Expansion Plan (RTEP). The plan includes many transmission facilities large and small, but the most controversial are the huge , interstate power lines:
The Mid-Atlantic Power Pathway (MAPP) would run for 220 miles from Virginia, across the Chesapeake Bay and up the Delmarva Peninsula to New Jersey at an estimated cost of $1.4 billion.
The Trans-Allegheny Interstate Line (TrAIL) would start in southwestern Pennsylvania, cut across West Virginia and end in Northern Virginia.
The Potomac-Appalachian Transmission Highline (PATH) is proposed to run for 290 miles from AEP’s John Amos coal plant in southern West Virginia to the Kemptown substation in central Maryland.
The Susquehanna-Roseland project would connect northeastern Pennsylvania with northern New Jersey.
Maryland Energy Report 
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