Abstract The Andrew Pfeiffenberger river running video collection (1954-1955) consists of home movies taken by Pfeiffenberger of river trip vacations with Bus Hatch and "Smuss" Allen on the Yampa River and Green River in Dinosaur National Monument in Eastern Utah and Western Colorado.

Abstract The Warm Springs Rapid history project (1996-2010) consists of materials related to the preparation of a special research trip for June 2-6, 2008 for the purpose of bringing together as many of the people who were there at Warm Springs in June of 1965 as possible. Warm Springs Rapid, on the Yampa River in Dinosaur National Monument, is one of the most difficult stretches of runnable whitewater in the United States.