417 j (0 go) IaJ _ _ a== , 5OO 0 15'0C P0 5 -i DISTANCE IN MILES ALONG MAIN STEM OF ST. JOHNS RIVER ..' ,:.. *- Figure 17. Water-surface profiles for floods of selected recurrence intervals : .. ....... ..........____on mrain..stem .of St. ,To1--- Rive~r in Orange County.