Flood damage resulting from development in flood plains in East Baton Rouge Parish, La., and adjacent areas has caused economic losses, making governmental officials and planners aware of the need for flood maps. Based on information in private and official files, flood maps have been prepared for 7 1/2-minute topographic quadrangles to show the interpretative delineation of the highest flood elevation that occurred between the years 1953 and 1974. The flood boundaries were mapped on the following quadrangles: Port Hudson, Zachary, Fred, Pride, Pine Grove, Walls, Scotlandville, Comite, Watson, Baton Rouge West, Baton Rouge East, Denham Springs, Plaquemine, St. Gabriel, and Prairieville.