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the ILLUDAS program to analyze the existing drainage system. <br /> It is inappropriate for current purposes due to limitations <br /> inherent to the program: <br /> a. According to the program authors, ILLUDAS has a design <br /> limit for storms having a recurrence interval of 10- <br /> years or less and thus cannot be used for 100-year <br /> storm events. <br /> b. It does not account for any storm water from backyard <br /> areas. Therefore, many areas that would contribute <br /> during large storm events were ignored. <br /> c. The report did not look at stage-storage-discharge <br /> relationship of any ponding areas, a critical item in <br /> any drainage scheme involving ponding. <br /> - 3 - <br />