65B - PROPOSED WATER AND SEWER RATE ADJ

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Proposed Rates SEWER RATE STUDY I City of Santa Ana, CA 49 RevenueSufficiency ..................................................................................... ............................... 50 TypicalBill Impacts ...................................................................................... ............................... 51 Summary............................................................................................................... ............................... 53 Appendix A: Refurbishment & Replacement Program .............. ............................... 54 Capital Asset Valuation and Refurbishment and Replacement Needs EvaluationMethodology ................................................................................. ............................... 55 Methodology................................................................................................... ............................... 55 Development of Asset Class Library ..................................................... ............................... 55 Development of Refurbishment and Replacement Schedules and Costs .................. 57 Development of Valuation of Capital Assets ........................................... ............................... 58 Capital Asset Inventory, Asset Class Library and Replacement Schedule ............................... 76 DatabaseDevelopment .................................................................................... ............................... 58 AssetInventory .............................................................................................. ............................... 58 Inventory Data Sources .............................................................................. ............................... 58 Asset Class Library Contents .................................................................... ............................... 59 Sewer Infrastructure System ................................................................... ............................... 59 Non-System- Specific Assets ...................... .. .... —..................................................................... 61 Refurbishment Intervals and Schedule ............................................... ............................... 62 Capital Asset Valuation and Schedule of R &R Needs and Estimated Costs .............. 62 Capital Asset Valuation Summary .......................................................... ............................... 62 Total System Capital Asset Schedule of R &R Needs ....................... ............................... 63 Appendix B: Sewer CIP Prioritization Process ................................ .............................65 Introduction....................................................................................................... .............................. — 66 CIP for Outside Plant Assets .......................................................................... ............................... 66 General Assumptions and Observations .................................................. ............................... 68 Sewer Collection System CIP Analysis ...................................................... ............................... 69 SewerSystem Statistics .............................................................................. ............................... 69 CCTV Observations, Sewer Spills and Repairs .................................. ............................... 76 Probability of Failure Analysis (PoF) ................................................... ............................... 90 Consequence of Failure Analysis (CoF) ............................................... ............................... 99 Business Risk Exposure ( BRE) .................................. ............................... ............................103 Appendix C: Inspection and Replacement Cost Calculation ..... ............................106 Introduction........................................................................... ............................... ............................107 Sewer Collection System R &R Prioritization..........— .............................. ............................109 BRE Replacement Prioritization .................................... ............................... ............................110 R &R Strategy Groups and CIP Budgeting ................... ............................... ............................113 CIP Project Identification .................................................. ............................... ............................118 NOVEMBER 2014 65B -161