Big Fill
The 928th tallest dam in the world
The Big Fill was an engineering project on the first transcontinental railroad in the U.S. state of Utah. To avoid a costly 800-foot (240 m) tunnel through mountainous terrain east of Promontory Summit, Central Pacific engineers mapped an alternate route that still needed to span the deep Spring Creek Ravine.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).