Kilbourn Bridge, Spanning Des Moines River, Kilbourn, Van Buren County, IA

Significance: The Kilbourn Bridge is significant as the first large-scale engineering project undertaken by the Iowa State Highway Commission and one of the only pin-connected truss designs used by the ISHC prior to adopting its standard, rigid-connected truss plans in 1913. It is a well-preserved example of wagon truss construction and one of the last of the multiple-span six pin-connected Pratt through trusses remaining in Iowa.
Unprocessed Field note material exists for this structure: N256
Survey number: HAER IA-85
Building/structure dates: 1909 Initial Construction
National Register of Historic Places NRIS Number: 98000477