The Social and Cultural Dimension of the 3r2n project include historical research, cultural analysis, and public dialogues which explore the histories of how the rivers have been perceived, used, and managed. Three of the following reports include work done by Carnegie Mellon students of American history, design, cultural studies, and cultural theory. An overview of landscape painting over the last 200 years explores the changes that occur in the depiction of rivers and river life. A series of urban land studies look at the way land ownership and public roads have changed in relationship to the rivers. Finally, we have a program of "river dialogues." The river dialogues put project experts in relationship to citizens. This provides a public forum about natural resources and the relevance of research to the real life issues which concern local citizens.