The Chamberlain is the only surviving bridge of the original five. The others were replaced as the river rose due to flood control dams put in place over time.
SD

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Image Caption: Members of the South Dakota Army National Guard’s 200th Engineer Company guide a raft on the Missouri River during a river crossing operation on June 11, 2016. The Chamberlain in the background is the only surviving bridge of the five. The others were replaced as the river expanded due to flood control dams.Era_date_from: 1920
1994

Belle Fourche, meaning "Beautiful Forks" in French, refers to the confluence of the Redwater and Belle Fourche Rivers. The gold rush to the Black Hills in 1876 brought many people to the area, but agriculture and livestock soon became the principal industries. Farmers and civic leaders recognized the need for a reliable source of irrigation water in this semi-arid region and petitioned the Federal government for funds to build an irrigation and flood control system.
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Image Credit: Public Domain (United States Bureau of Reclamation)Image Caption: An aerial view of the Belle Fourche DamEra_date_from: 1911
1988