The North St. Vrain Creek Bridge, in Lyons, Colorado, was built in 1955. It was listed on the National Register of Historic Places in 2002.
It brings State Highway 7, at its milepost 32.98, over the North St. Vrain Creek. It is a single-span road bridge designed by the U.S. Bureau of Public Roads and built in 1955 by Lowdermilk Brothers contractors. It is a concrete rigid frame bridge. The span is long; the roadway wide in a structure that is overall. With
It is located on the southern side of Lyons.
See also National Register of Historic Places listings in Boulder County, Colorado
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