1 Dune Walkover Guidance This resource contains copies of the following two publications, which provide design criteria for beach walkover structures: Beach/Dune Walkover Guidelines, by the Florida Bureau of Beaches and Coastal Systems, Florida Department of Environmental Protection, Revised January 2006. Beach Dune Walkover Structures, SUSF-SG-76, by Todd L. Walton, Jr., and Thomas C. Skinner. Published by the Marine Advisory Program of the Florida Cooperative Extension Service and the Florida Sea Grant, March 1983.