Scope and Contents From the Collection: The Andrew Pfeiffenberger river running video collection (1954-1955) consists of home movies taken by Pfeiffenberger of river trip vacations with Bus Hatch and Hatch River Expeditions on the Yampa River and Green River in Dinosaur National Monument in Eastern Utah and Western Colorado. The 3 16mm films in this collection have been digitized and are available for viewing on the DVD detailed in this finding aid.