A coalition of environmental groups today filed a lawsuit aiming to halt construction of a $1.2 billion power line slated to cross federal parklands along the Pennsylvania-New Jersey border. The groups argued the National Park Service violated its mandate to conserve scenery when it approved a 5-mile portion of the Susquehanna-Roseland power line through the Delaware Water Gap National Recreation Area, Middle Delaware National Scenic and Recreational River, and Appalachian National Scenic Trail.