From the record
“Dinosaur National Monument is an American national monument located on the southeast flank of the Uinta Mountains on the border between Colorado and Utah at the confluence of the Green and Yampa rivers. Although most of the monument area is in Moffat County, Colorado, the Dinosaur Quarry is located in Utah, north of the town of Jensen, Utah.”
Wikipedia article Dinosaur National Monument, CC BY-SA 4.0.
One of 17 National Register listings published here for Uintah County · listed in 1986 · category: Building · built in 1958, by Anshen & Allen · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article

