They came up to a steel trestle that held the ancient penstock above an open gorge.
He moved up the steel trestle by the ice climbing area designated The Schoolroom.
in length, built in 1851-1852 in Io spans, lead timber trestle piers 190 ft.
About a mile distant there was a trestle spanning a deep gorge.
wide, which is spanned by a trestle of the Northern Pacific 8400 ft.