The groups had challenged the federal permits for the Susquehanna-Roseland power line through the Delaware Water Gap National Recreation Area.
The company called the ruling a ”right decision for millions of people throughout the mid-Atlantic region who will have more reliable electric service because of this project."
PPL Electric Utilities Transmission and Substations vice president Stephanie Raymond said the ruling reaffirms the position of the companies and the National Park Service that the permits were issued properly and following comprehensive study.
"We will move forward with construction as planned," Raymond added.
Already under construction in Pennsylvania and New Jersey, the 145-mile Susquehanna-Roseland line is required to maintain reliability of the regional electric grid, and prevent overloads of other existing power lines.
The line, which is jointly owned by PPL Susquehanna and Allegheny Electric Cooperative, is anticipated to start operations by June 2015.
