Which Montana tributary was Emmet Sullivan born in?
Emmet Sullivan:  He was born in Powder River, Montana, and worked on Mount Rushmore, and later created the five dinosaurs in Dinosaur Park in Rapid City, South Dakota in 1934, his first large scale project. Powder River (Wyoming and Montana): Powder River is a tributary of the Yellowstone River, approximately 375 mi long in northeastern Wyoming and southeastern Montana in the United States.
i don't know