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CHAPTER 8. DAM FAILURE <br />8-11 <br />Jurisdiction Affected Population % of City Population <br />Unincorporated Kittitas County 2,062 9.6% <br />Totala 4,417 12.4% <br /> a. Represents the total population in the combined inundation areas all dams. <br />8.5.2 Property <br />Property exposure numbers were based on an aggregated value for all mapped dam inundation areas. Based <br />on assessor building data, the exposure analysis estimated that there are 1,904 structures within the mapped <br />dam failure inundation areas in the planning area. The value of exposed buildings in the planning area is <br />summarized in Table 8-4. Structures exposed to dam failure inundation areas compose a considerably large <br />portion of the population in some communities. With 12.4 percent of structures exposed, $327 million of <br />building and content value is at risk, representing 7 percent of the total assessed value of the planning area. <br />Except for 13 locations, nearly all structures within South Cle Elum (97.7 percent) are exposed to a dam <br />failure inundation area which suggests that South Cle Elum may be a primary target for mitigation outreach. <br />The cities of Cle Elum and Ellensburg as well as Kittitas County also have several hundred structures <br />exposed to dam failure inundation areas. Losses for these communities are near $50 million in Cle Elum <br />and Ellensburg with Kittitas County approaching $216 million. <br />Table 8-4. Value of Property Exposed to Dam Failure <br />Jurisdiction Number of <br />Buildings Exposed <br />Exposed Building <br />Value <br />% of Total <br />Assessed Value <br />Cle Elum 479 $56,666,641 62% <br />Ellensburg 311 $48,097,160 5% <br />Kittitas 0 0 0% <br />Roslyn 0 0 0% <br />South Cle Elum 225 $8,549,880 98% <br />Unincorporated Kittitas County 889 $215,781,250 6% <br />Total 1,904 $327,094,900 7% <br /> <br />8.5.3 Critical Facilities <br />Exposure analysis determined that 15 of the planning area’s critical facilities (27 percent) are in the mapped <br />inundation areas, as summarized in Table 8-5. <br />Table 8-5. Essential Facilities in Dam Failure Inundation Areas <br />Jurisdiction Fire Station Hospital Emergency <br />Facility School Total <br />Cle Elum 2 0 0 0 2 <br />Ellensburg 1 0 2 0 3 <br />Kittitas 0 0 0 0 0 <br />Roslyn 0 0 0 0 0 <br />South Cle Elum 1 0 0 0 1 <br />Unincorporated Kittitas County 5 0 0 4 9 <br />Total 9 0 2 4 15 <br />