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Rainbow Bridge

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Frommer's Staff

Also called the James Marsh Arch Bridge, this 11-arch concrete bridge was built over the South Platte River in 1923, at a construction cost of $69,290. Listed on the National Register of Historic Landmarks and the National Register of Engineering Landmarks, the 1,110-foot bridge is the only rainbow-arch design in Colorado. For information, contact the Fort Morgan Museum , and allow 15 to 30 minutes.