Conant Creek Pegram Truss Railroad Bridge
Fremont County, US
The Conant Creek Pegram Truss Railroad Bridge, in Fremont County, Idaho near Grainville, Idaho and Ashton, Idaho, was built in 1894. It brought a railroad over the Conant Creek, 1 mile south of the junction of Squirrel Rd. and the old Ashton-Victor railroad spur tracks. It is a Pegram truss bridge,
designed by George H. Pegram. It was listed on the National Register of Historic Places in 1997. It now carries the Ashton-Tetonia Trail, and is known as the Conant Creek Trestle. It is a 780 feet (240 m) long bridge, spanning across four supporting steel towers, built to carry a single railroad track. The towers, fabricated in 1911 by the American Bridge Company. The two center towers are about 107 feet (33 m) high, and with 30 feet (9.1 m) of truss above, the total distance from base to railroad bed is 137 feet (42 m). The three central spans are pin-connected Pegram truss deck spans, each 164 feet (50 m) long and 14 feet (4.3 m) wide, with a maximum depth of 30 feet (9.1 m). At each end are steel deck girders 60 feet (18 m) long at the north end and 30 feet (9.1 m) at the south end, and then timber approach spans 60 and 45 feet long. It was built in 1911 with Pegram spans that had...
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