The Clinch River Environmental Restoration Program (CR-ERP) at Oak Ridge National Laboratory's (ORNL) Environmental Sciences Division (ESD) is charged with characterizing the nature and extent of contamination in the Clinch River and in Poplar Creek. In addition, the risk to human health and the environment resulting from any U.S. Department of Energy-originated contamination is to be characterized, and remediation alternatives for mitigating such risks explored. As a part of the sediment characterization, data from a hydro-acoustic survey of the Clinch River, performed by the U.S. Army Corps of Engineers Waterways Experiment Station (WES), was used to model river bathymetry and sediment type. These data and models were visualized using state-of-the-art geographic information systems (GIS) and scientific visualization systems. The latest information technologies are being used to deliver the results of the modeling and visualization efforts in the form of animation sequences. Using and developing information technologies for distribution of graphical and animated information via the World Wide Web is supporting the nation's National Information Infrastructure (NII) objectives. Moreover, these technologies are being applied to environmental research activities by providing access to references, documents, maps, databases, and scientific data and model visualization. Finally, these tools are made available not only to scientists, but are also used to interface with the public and to deliver information and data to stakeholders and interested parties, providing a means for collaboration among scientists, government agencies, and the private sector in related areas of research and development.