The K-99 Wamego Bridge is an automobile crossing of the

Kansas River The Kansas River, also known as the Kaw, is a river in northeastern Kansas in the United States. It is the southwesternmost part of the Missouri River drainage, which is in turn the northwesternmost portion of the extensive Mississippi River dr ...

Wamego, Kansas Wamego is a city in Pottawatomie County, Kansas, United States. As of the 2020 census, the population of the city was 4,841. History Wamego was platted in 1866. It was named for a Potawatomi Native American chief. The first post office in ...

. It is the last Kansas River crossing until

Manhattan Manhattan (), known regionally as the City, is the most densely populated and geographically smallest of the five boroughs of New York City. The borough is also coextensive with New York County, one of the original counties of the U.S. state ...

17 miles to the west. The bridge is 303.5 meters long. The current structure is the second bridge at this location. The longest Marsh arch bridge ever built stood at this location from 1929 until 1990. The Marsh arch bridge, or rainbow bridge, was patented by

James Barney Marsh James Barney Marsh (April 12, 1856June 26, 1936) was an American engineer and bridge designer. He patented a new design for arch bridges. Marsh gave Archie Alexander, the first African-American to graduate as an engineer from Iowa State Univers ...

and is a reinforced concrete

arch bridge An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct ...

. The John Mack Bridge in Wichita, Kansas is now the longest remaining Marsh arch bridge.Kansas Sampler Foundation
John Mack Bridge, Wichita, KS
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References

External links

*Kansas Historical Records Inventory
Photo of the original Marsh arch structure
Bridges over the Kansas River Road bridges in Kansas Girder bridges in the United States Steel bridges in the United States Buildings and structures in Pottawatomie County, Kansas {{Kansas-bridge-struct-stub