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9 Damage Reduction Within the reach of Fountain Creek analyzed herein, the flood plain is occupied by several types of structures. These include: 1. Retail shopping stores (20,000 square feet), and small commercial businesses. 2. Single family residences. 3. Mobile homes. 4. Utilities. 5. Water diversion structure. With the drainage facilities existing at this time, many of these struc- tures would be damaged by even the la-year flood event, where shallow over- banks are present. During the laO-year event, buildings in the Red Rock Canyon Shopping area would be inundated by floodwaters to eight feet in depth. The closure of 31st Street, as well as the possible loss of the bridge struc- ture could also occur. The potential for greater overbank flooding exists because of the blockage in the existing channels, along with structural damage related to the impact of flood debris on buildings. Finally, during the lOa-year event, large boulders could also damage bridge structures along this reach of Fountain Creek. An analysis of the potential dollar loss from floods of varying frequen- cies was performed. This was done by estimating the depth of flooding at each structure for the 10-, 50- and lOa-year floods, assuming no channel improve- ments. The results of this analysis are shown on Table 3. Cost of the dama- ges to structures within the Fountain Creek flood plain were estimated using depth, damage relationships prepared by the FEMA. Annual damages for this portion of Fountain Creek are estimated at $1.1 million. The estimate of losses resulting from the closure of businesses during and after a flood event were made assuming a minimum closure of ten business days for the 10-year floods, and 60 days for the businesses within structures expected to withstand the lOa-year event. Loss of sales taxes and wages were estimated using gross sales figures for 1980 through 1984 for the Red Rock Canyon Shopping Center, and an average wage of $7.00/hour, respectively.