Lincoln Covered Bridge, Autumn, Woodstock, Vermont Poster

"Lincoln Covered Bridge in Autumn, Woodstock, Vermont" by Catherine Sherman. The Lincoln Covered Bridge, an historic one-lane covered bridge, is just south of United States Route 4 in West Woodstock, Vermont. Built in 1877, it was listed on the National Register of Historic Places in 1973. The Lincoln Covered Bridge spans the Ottauquechee River, just south of US 4, connecting that road to Bridges Road and Fletcher Hill Road on the south side of the river. The bridge is a single span, 136 feet (41 m) in length, resting on concrete and stone abutments, and is 18.5 feet (5.6 m) wide with a roadway width of 14 feet (4.3 m), according to Wikipedia. The bridge is supported by two arch trusses, which are sheltered by a post-and-beam structure finished with a metal standing seam roof and vertical board siding. The trusses are a variant of the Pratt truss, with laminated arches supporting the deck by a combination of wooden and iron verticals, with iron cross bracing. Laminated support beams have been added below the floor to increase the bridge's strength. The superstructure of the bridge is fastened to the ground by a system of metal guy wires. According to covered bridge historian Richard S. Allen, the Lincoln Bridge is the only known surviving use of the Pratt truss in wood in in the United States; this form is seen much more widely in metal bridges built later.