Which bridge is under the youghiogheny river and can still be seen when the lake levels are extremely low?

Respuesta :

The Great Crossings Bridge. The Great Crossings Bridge, built in 1818 to carry traffic along the National Road, has emerged from the drought-stricken Youghiogheny River Lake along with the ruins of Somerfield. In the background, the replacement bridge carries Route 40 traffic.