Fort Morgan's Rainbow Arch Bridge has stood over the South Platte for a century

On the edge of Fort Morgan, the Rainbow Arch Bridge carries a lot of local memory across the South Platte River.

History Colorado lists the Rainbow Arch Bridge in Fort Morgan as a National Register property. The National Park Service NPGallery record also identifies it as a National Register-listed structure in Morgan County, with engineering as its area of significance and Marsh Engineering Co. tied to the design record.

That is the useful point for a resident or visitor: the bridge is not just scenery near the river. It is part of the county’s transportation and engineering history, and it gives Fort Morgan a visible link between the South Platte, early highway travel, and historic preservation.

If you want the careful history, start with History Colorado and the National Park Service record. Those sources are steadier than travel blurbs and better for checking dates, names, and official status.