65B - PROPOSED WATER AND SEWER RATE ADJ

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126 WATER RATE STUDY I City of Santa Ana, CA Figure C- 2: BRE Heat Map Graphic by Main Replacement cost (2012 dollars) O) L LL 4- O 4J U i GJ Cr O H O V 1 10 $0.8 9 $0.3 8 $1.2 7 $0.3 6 $1.1 5 $4.3 Probability of Failure 2 3 4 5 6 7 8 9 10 4 $20.9 $18.5 $11.7 $55.7 $6.7 $44.8 $21.3 $12.0 3 i $4.1 ( $2.5 1 $3.9 $22.0 $1.2 $4.8 $3.1 $4.2 $0.9 $5.4 $0.9 $0.9 2 $38.7 $25.2 $15.3 $91.4 $12.8 $35.5 $18.9 $11.5 $3.4 $4.9 1 $1.7 $6.0 $9.2 $753 $24.5 $54.3 $47.4 $26.8 $4.0 $3.0 Millions of Dollars Total Cost: $973.2 WATER DISTRIBUTION SYSTEM R &R PRIORITIZATION Up to this point the analysis focused on assessing the likely condition of the water distribution system mains based on available source data. PoF and CoF scores were combined into an overall risk score for each pipe segment. Using these results the study then took on a different focus; that of prioritizing pipe inspections and /or replacements and grouping those pipe segments into probable R &R projects. These steps include: • BRE Replacement Prioritization: each pipe segment ranked from highest to lowest risk and assigned a full replacement cost estimate. It gives equal consideration for both PoF and CoF factors. Although useful information, this listing is generally not used for actual replacement planning or budgeting. • R &R Strategy Groups and CIP Budgeting: pipe segments assigned to various inspection and /or replacement strategies applied to address differing risk considerations. Based on the suggested R &R activity for each strategy group, annual inspection and replacement budgets were developed. These results are sufficient for general budgetary planning. However, since prioritized pipe segments may be highly segmented and scattered across the service area, this summery is only partially useful for detailed planning. Adjusting the assumptions made here can create a variety of budgeting scenarios. 65B -138 NOVEMBER 2014