The authors thank Michael Rink and David Doyle of the National Oceanic and Atmospheric Administration.  Authors are appreciative of contributions by Jennifer Wozencraft and Thomas Smith of the U.S. Army Corps of Engineers (USACE) and U.S. Geological Survey (USGS) personnel E. Robert Thieler, Emily Himmelstoss, Ann Gibbs, Thomas Reiss, and Cheryl Hapke.  The authors acknowledge Matthew Niles, Daren Suzuki, and Thorne Abbott of the Maui Planning Department for their support of erosion studies on Maui, and Sam Lemmo of the Hawaii Department of Land and Natural Resources. The University of Hawaii Sea Grant extension personnel have been a valuable asset in coastal studies and policy development. The authors also acknowledge the Kauai County Planning Department, City and County of Honolulu Department of Planning and Permitting, Maui County Planning Department, Hawaii Coastal Zone Management Program, Hawaii Department of Land and Natural Resources, USACE, NOAA Coastal Services Center, Federal Emergency Management Agency, and Harold K.L. Castle Foundation for funding erosion studies on Kauai, Maui, and Oahu. In addition, the authors thank the USGS Coastal and Marine Center project staff and researchers in Menlo Park and Santa Cruz, California; St. Petersburg, Florida; and Woods Hole, Massachusetts.