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Water for Monterey County Regional Project Capital and O&M Cost Description

Water for Monterey County Regional Project Capital and O&M Cost Description. Lyndel Melton, P.E. RMC Water and Environment. Capital and O&M Cost Description Agenda. Regional Project Description Basis for Cost Estimates Capital and O&M Costs Comparison of Costs.

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Water for Monterey County Regional Project Capital and O&M Cost Description

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  1. Water for Monterey CountyRegional ProjectCapital and O&M Cost Description Lyndel Melton, P.E. RMC Water and Environment

  2. Capital and O&M Cost Description Agenda • Regional Project Description • Basis for Cost Estimates • Capital and O&M Costs • Comparison of Costs

  3. Regional ProjectUpdated Phase 1 Description

  4. Phase 1 Project Description • DEIR Phase 1 Project • 10 mgd Desal Plant • 14 mgd SWTP • +3 ASR Wells • Common Facilities • Terminal Reservoir • ASR Wells & PS • Monterey Pipeline • Valley Greens PS • Revised Phase 1 Project • 10 mgd Desal Plant • No SWTP • No Added ASR Wells • Common Facilities • Terminal Reservoir • ASR Wells & PS • Monterey Pipeline • Valley Greens PS

  5. Surface Water Treatment Plant With Surface Water Treatment Plant

  6. No Surface Water Treatment Plant

  7. Regional Project Supply Sources To ASR To MCWD To MCWD CAW Only Supplies

  8. Coastal Water Project Supply Sources CAW Only Supplies

  9. Desal Plant Vicinity Plan

  10. Desal Plant Site Plan

  11. Need for Partial Second Pass RO System • With single pass: • Boron concentrations can be toxic to some crops & foliage • Maximum chloride and sodium concentrations are anticipated to be 200 & 180 mg/L • Partial second pass would: • Reduce boron levels to <0.5 mg/L • Reduce chloride and sodium concentrations to 100 & 80 mg/L

  12. Intake Well Locations

  13. Intake Well Locations

  14. Regional ProjectBasis for Cost Estimates

  15. Basis for Capital Cost Estimating • Used CAW’s cost criteria/unit costs • Reviewed for appropriateness and agree with bases • Supplemented with vendor quotes • Design/Build for Desal • Design-Bid-Construct for Other Facilities

  16. Basis for O&M Estimating • Used CAW’s O&M • Labor • Chemical • R&R • *Membrane Replacement • Power supply costs • Desal Plant – MRWMD • Winter – $0.08/kW-hr • Summer - $0.12/kW-hr • Desal Wells – PG&E • Winter – $0.09/kW-hr • Summer - $0.14/kW-hr

  17. Expected Accuracy Ranges for Cost Estimating (Same as CAW Estimates) +60% +40% Expected Accuracy Range for Cost Estimate +20% Project Completion 0% -20% Level of Project Definition 10% Project Complete (Class 4) 30% Project Complete (Class 3) 100% Project Complete (Class 1)

  18. Regional ProjectCapital and O&M Cost Estimates

  19. Table 7 – Estimated Cost – Phase 1 DEIR Project

  20. Table 8 – Estimated Costs of Common Facilities

  21. Table 9 – Estimated Costs of Phase 1 ProjectWith No Surface Water Supply

  22. Alternative Project Cost Comparisons

  23. Basis for Cost Comparisons • Used CAW’s & MCWD’s cost and production numbers • Cost of capital for Regional Project – 5.15% over 30 years • Cost of funds for CAW alternatives – 8.55% over 30 years • Unit water costs developed to compare all alternatives (Annualized Capital Costs + Annual O&M Cost) Average Annual Water Production in AFY Unit Cost of Water =

  24. Table 10 – Comparison of Estimated Costs of DEIR Based Projects

  25. Table 11 – Comparison of Estimated Costs with no Surface Water Supply

  26. Table 13 – Sensitivity Analysis

  27. Regional Project – Phase 1 Implementation Schedule

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