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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br />4.6.2.8. Dam and Levee Failure Risk lndex Score <br />The FEMA NRI does not assess dam and levee failure events. Table 4-39 represents the dam and levee <br />failure Total Risk Score for Kittitas County, based on the Risk Assessment Methodology, as defined in <br />Section 4.3 of this Plan. <br />Table 4-39. Dam and Levee Failure Total Risk Score <br />Hazard <br />Event Probability <br />Factor Vulnerability lmpact <br />22Dam and Levee Failure 1 o 11 17 37 <br />Consequence: Sum of all weighted factors. <br />Extent: Sum of the weighted Extent factors. <br />Vulnerability: Sum of the weighted Vulnerability factors. <br />lmpactClassificationVulnerability <br />Impact: Sum of the weighted lmpact factors. <br />Io(a/ Risk Score = Probability x Consequence <br />" Normalized to 100 <br />0 -24 0 -24Low (L)1 0-6 0-6 0-12 <br />25 -52Medium (M)2 7-12 7-12 13-26 25-50 <br />J 13-18 13-18 27 -39 51 -75 53 and above <br />The Iegend-specifically the assignment of low, medium, and high-provides an additional means to qualitatively assess the probability factor, sum of <br />weighted factors, and the total risk scores for each hazard. The Consequence Score represents the sum of the Extent, Vulnerability, and lmpact Factors. <br />The Total Risk Score is a measure of Probabilitv and Consequence. <br />i , )i,: tll i.lt r'" <br />r ,{,i,irai i lillL <br />TotalRisk <br />i: irtrilr (rj, ili <br />Total Risk Score Legend <br />)li, rl <br />Total Risk <br />Score <br />Chapter 4: Hazard ldentification and Risk Assessment 95