What underground nuclear bunker near Blue Ridge Summit, Pennsylvania known as "underground Pentagon" became operational in 1966?
Raven Rock Mountain Complex The Raven Rock Mountain Complex (RRMC) is an American military installation with an underground nuclear bunker near Blue Ridge Summit, Pennsylvania, at Raven Rock Mountain that has been called an "underground Pentagon." The bunker has emergency operations centers for the United States Army, Navy, and Air Force. Along with Mount Weather Emergency Operations Center in Virginia and the Cheyenne Mountain Complex in Colorado, it formed the core bunker complexes for the US Continuity of Government plan during the Cold War to survive a nuclear attack.
Heroes Tunnel Heroes Tunnel (formerly West Rock Tunnel) is a 1,200 ft , twin-tube tunnel carrying Route 15 (Wilbur Cross Parkway) through West Rock Ridge in New Haven, Connecticut. Opened in 1949, it was said to be the only vehicular tunnel "to pass beneath a land feature" in Connecticut and all of New England. However, this statement is not accurate as there are other vehicular tunnels in New England.