CSVT Bridge: Design and Construction Challenges The CSVT River Bridge is a key component to a new 13-mile stretch of highway near Selinsgrove and Northumberland, Pennsylvania. The bridge is a six-lane, 15-span, 7/8-mile-long multi-girder structure comprised of three independent 5-span steel superstructure units. The eight 9'-6"-deep steel plate girders are spaced at 12'-3" and reach […]