The area of the Allegheny Mountain Tunnel along the Pennsylvania Turnpike would instead be a 1,000-foot-wide gash in the mountain if plans by the Pennsylvania Turnpike Commission follow through.

However, some of the infrastructure is old, like the 100-year-old, 19-mile-long Mountain Tunnel, which is a key conduit for the Hetch Hetchy water flow on its route to the Bay Area. But a project ...

Fifty years ago, about 500 people gathered at I-77 Big Walker Mountain Tunnel to celebrate a transportation ... a rail-protected sidewalk about 2.5-feet wide, emergency telephones, fire ...

HOT SPRINGS — Later this summer, a contractor will be pushing a 60-inch-diameter tunnel one-half mile through Blakely Mountain ... leading edge of the 5-foot-wide, 2,600-foot-long passage.