65B - PROPOSED WATER AND SEWER RATE ADJ

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City of Santa Ana, CAI >E VER RATE STUDY Figure C- 2: BRE Heat Map Graphic by Main Replacement Cost (2012 dollars) V $2.0 S15.7 52.5 53.5 53.0 $34.7 52.2 52.2 0 C 5 50.5 53.4 50.7 57.5 50.5 510_1 S0.6 ' 51.8 3 4 Cr 50.4 55.2 $1.2 53.4 $1.0 $5.4 $0.2 50.8 3 50.8 ` S8.4 $1.5 51.6 $1.8 $3.0 514 50.4 $0.1 50.3 V2 5166 527.8 $4.4 $4.3 $4.5 $7.4 f $3.1 ( 51.2 $0.3 50.8 1 59.2 x$118 7 $24.1 517.1 $17.1 $29.2 $9.5 55.3 $1.1 52.0 Total Cost: 5499.1 SEWER COLLECTION SYSTEM R &R PRIORITIZATION Up to this point the analysis focused on assessing the likely condition of the sewer collection 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. BLACK & VEATCH I Appendix C: Inspection and Replacement Cost Calcul a Nr,n 6513-268 Probability of Failure 1 2 3 3 4 5 5 6 6 7 7 8 8 9 1 10 10 $ $9.1 LJ 9 9 $ $$22.8 $ $2.3 8 8 5 53.7 5 50.4 $ $19.8 6L 4 7 7 $ $0.2 56.1 $ $0.4 5 51,6 $ $5.8 6 SEWER COLLECTION SYSTEM R &R PRIORITIZATION Up to this point the analysis focused on assessing the likely condition of the sewer collection 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. BLACK & VEATCH I Appendix C: Inspection and Replacement Cost Calcul a Nr,n 6513-268