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City of Santa Ana, CA I WATER RATE STUDY <br />REVISED ANALYSIS <br />At the request of the City, a revised Water System CIP Analysis was performed for Santa Ana after the <br />draft report was developed. The revised results reflect the removal of all non -City owned water <br />distribution mains (specifically those listed as Water_Type = "IRWD," "MCWD," "MWD," or <br />"Reclaimed "). None of the initial pipe statistics, cohorts, PoF / CoF criteria or prioritization factors were <br />changed. The non -City owned mains were removed after the full prioritization process to allow <br />comparison of results. The following sections provide the summarized results of the "revised" analysis <br />starting at the conclusion of the Business Risk Exposure (BRE) calculation. <br />Business Risk Exposure (BRE) <br />Figure D - 1 provides a "heat map" graph showing the resulting distribution of PoF vs. CoF scores by <br />miles of City -owned mains. Combined, these represent the BRE score. Higher probability of failure assets <br />are plotted near the right. Higher consequences of failure assets are plotted near to the top. Figure D - 2 <br />provides a map of City -owned mains color coded by total BRE score. A partial table of water main <br />pipeline segments ranked by BRE score is included in the Replacement Prioritization section below. <br />Figure D - 1: Water System BRE Heat Map Graphic by Miles of City -owned Water Mains <br />Probability of Failure <br />1 2 3 4 5 6 7 8 9 10 <br />10 .3 0.0,' -'0 0..0 <br />i 9 0.1 0.5 2.3 - 0. '0 - 0.2 <br />F 0.0 <br />3 e <br />•� 8 0.5 1.2 2.7 ;0.0 0 0.8 ,0.0 0.3 <br />LL llL <br />7 0.1 1.0 .� 2.7 2.8 0.0 - -.0 0.0 1.5 <br />O <br />y 6 v 0.5 2.1 7.5 4.2 1 00 0 "` 0.0 0.2 <br />V <br />F <br />5 <br />2.2 <br />1.5 <br />1.0 <br />8.3 <br />!� 1.3 <br />7.4 <br />5,4 <br />1.7 <br />0.0 <br />0.4 <br />7 <br />S <br />4 <br />10.5 <br />8.8 <br />5.8 <br />27.9 <br />3.4 <br />22.4 <br />10.7 <br />5.5 <br />0.4 <br />2.7 <br />OJ <br />3 <br />2.3 . <br />1.0 <br />.1 <br />12,0 <br />0.6 <br />2.7 <br />1.7 <br />2.3 <br />0.5 <br />0.5 <br />O <br />2 <br />21.6 <br />14.0 <br />8.5 <br />t,2 <br />51.2 <br />7.2 <br />19.9 <br />132.1 <br />10.6 <br />6.5 <br />1.9 <br />2.7 <br />1 <br />1.0 <br />3.5 <br />5.4 <br />44.5 <br />14.5 <br />27.9 <br />15.9 <br />2A <br />1.8 <br />Miles <br />Total Miles: <br />480.3 <br />SLACK & VEA'TCH s ppenoix C r- Owned 3rrs dnaiy;is <br />65B -149 <br />