From the record
“Dale Creek Crossing was a railway bridge located in present-day Wyoming. The 650-foot (200 m) bridge, completed in 1868 in the southeastern Wyoming Territory, presented engineers of the United States' first transcontinental railroad one of their most difficult challenges.”
Wikipedia article Dale Creek Crossing, CC BY-SA 4.0.
One of 42 National Register listings published here for Albany County · listed in 1986 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service