06-23-08 Drainage and Flooding Committee Minutes

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floodproofmg is a mitigation technique that is appropriate for the Brookglen neighborhood; according to the returned data sheets flood depths have not exceeded 3 feet. MAXIMUM PROTECTION LEVEL IS 3 FEET (INCLUDING FREEBOARO) ~ ~ ~ BACKFLOW VALVE PREVENTS SEWER AND DRAIN BACKUP ~ SHIELDS FOR OPENINGS EXTERNAL COATING OR COVERING IMPERVIOUS TO FLOOD WATER Figure 3-6: Dry Floodproofed House Not all parts of the building need to be floodproofed. It is difficult to floodproof a garage door, for example, so many owners let the garage flood and floodproof the walls between the garage and the rest of the house. Appliances, electrical outlets, and other damage-prone materials located in the garage should be elevated above the expected flood levels. Examples of floodproofed houses can be seen in Figures 3-7 through 3-10. Dry floodproofmg has the following shortcomings as a flood protection measure: . It usually requires human intervention, i.e., someone must be home to close the openings. . Its success depends on the building's condition, which may not be readily evident. It is very difficult to tell if there are cracks in the slab under the floor covering. . Periodic maintenance is required to check for cracks in the walls and to ensure that the waterproofmg compounds do not decompose. . There are no government fmancial assistance programs available for dry floodproofmg, therefore the entire cost of the project must be paid by the homeowner. . The NFIP will not offer a lower insurance rate for dry floodproofed residences. Cost: The cost for a floodproofmg project can vary according to the building's construction and condition. It can range from $5,000 to $20,000, depending on how secure the owner wants to be. Owners can do some of the work by themselves, although an experienced contractor provides greater security. Each property owner can determine how much of their own labor they can contribute and whether the cost and appearance of a project is worth the protection from flooding that it may provide. Feasibility: As with floodwalls, floodproofmg is appropriate where flood depths are shallow and are of relatively short duration. It can be an effective measure for many of the structures and flood conditions found in the Brookglen target area. It can also be more attractive than a floodwall around a house. Brookglen Area Analysis - DRAFT 22 9/8/2008