Headwater Flooding Biloxi River Basin USGS streamgages on the Biloxi River recorded 10- to 25-year recurrence interval floods as a result of Georges. The Biloxi River gage at U.S. Highway 49 at Wortham, MS (site 1, fig. 3), had the second highest peak of record since 1953. The peak discharge of 9,430 cubic feet per second was between a 10- and a 25- year recurrence interval (table 1). The Biloxi River gage at a county road bridge near Lyman, MS (site 2, fig. 3), also recorded the second highest peak of record since 1965 with a peak stage of 21.24 feet and a peak discharge of 25,000 cubic feet per second. The peaks of record for these two gages occurred on May 9 and 10, 1995, respectively. Gages on the Biloxi River Basin have recorded extremely large floods twice in the past 3 years (table 1).