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24-hour flood protection using "Technical Paper 40", which is 5.9 inches in 24 hours. • The cost to provide 100-year plus an additional 30% flood protection, which,would be 7.7 inches of rainfall in 24 hours, would increase the preliminary estimate by approximately 45%. Therefore, the anticipated cost to provide 100-year plus 30% flood protection is preliminarily estimated at approximately $8.3 million. .Additional work will be required to verify the need and extent of project work and the cost of the work once City policies and programs are defined. A brief description of the location, problem, preliminary recommendation on how to correct the problem, and associated cost estimate is shown in the attached Table 1. Preliminary recommendations for providing flood protection in the City of St. Anthony include purchasing the following homes and constructing storm water overflow basins in their locations. These homes are: • 2716 St. Anthony Boulevard • 2709 Pahl Avenue • 2700 Pahl Avenue • 2704 Pahl Avenue Grant applications to FEMA for the buyout of these homes will be completed and presented for Council approval on December 17, 1997: • D. Council Response Options Based on the above problem descriptions and preliminary recommendations, the City Council needs to decide on a response to these problems, based on the knowledge that these flood problems were generated by an event that exceeded typical storm system design standards for the Metropolitan area. In order to address the flooding problems identified within this report, the City Council will need to develop a number of policies and/or programs. Policies and/or programs to be considered include defining the level of protection provided for structures or property within the City, providing a grant program or a storm water utility to pay for storm water improvements, and defining a time line that these improvements should be made. Outlined below, please find a description of the policies and/or programs that the City needs to establish in order to respond to flooding problems generated by the July 1, 1997 event: 1. Define level of protection to be provided for structures. The City must establish the design storm event for which they will accept responsibility, if any, and to which structural protection will be provided. Drainage systems in the Metropolitan area are typically designed to accommodate a 100-year event • without allowing structures to be inundated. These systems incorporate storm City of St.Anthony WSB Project No. 1065.11 Pape 5 5