The authors wish to thank the many individuals who contributed to the development of this report. Claudia Faunt and Thomas Haltom (USGS), and Frank D'Agnese and Grady O'Brien (formerly with USGS), provided support and expertise in the application of the geographic information systems (GIS) used to develop the model inputs and to help analyze the model results. Helpful suggestions were provided by Daniel Bright (USGS), Robert Meyer (USGS), Devin Galloway (USGS), Richard Waddell (GeoTrans Inc.), Tony Buono (retired USGS), Doug Bedinger (formerly with USGS), and James Harrill (formerly with USGS). Glenn Schwegmann (formerly with USGS) and Myrna DeBortoli (USGS) provided editorial reviews of the manuscript and also contributed to the development of the manuscript. David Uyematsu (USGS) contributed to the development of illustrations. James Baker (USGS) prepared the final version of the manuscript for the web-based publication.