Water for Monterey County Regional Project Capital and O

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Water for Monterey CountyRegional
ProjectCapital and OM Cost Description
Lyndel Melton, P.E. RMC Water and Environment
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Capital and OM Cost Description Agenda

• Regional Project Description
• Basis for Cost Estimates
• Capital and OM Costs
• Comparison of Costs

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Regional ProjectUpdated Phase 1 Description
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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

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Surface Water Treatment Plant
With Surface Water Treatment Plant
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No Surface Water Treatment Plant
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Regional Project Supply Sources
To ASR
To MCWD
To MCWD
CAW Only Supplies
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Coastal Water Project Supply Sources
CAW Only Supplies
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Desal Plant Vicinity Plan
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Desal Plant Site Plan
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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 lt0.5 mg/L
• Reduce chloride and sodium concentrations to 100
  80 mg/L

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Intake Well Locations
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Intake Well Locations
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Regional ProjectBasis for Cost Estimates
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Basis for Capital Cost Estimating

• Used CAWs 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

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Basis for OM Estimating

• Used CAWs OM
• Labor
• Chemical
• RR
• Membrane Replacement
• Power supply costs
• Desal Plant MRWMD
• Winter 0.08/kW-hr
• Summer - 0.12/kW-hr
• Desal Wells PGE
• Winter 0.09/kW-hr
• Summer - 0.14/kW-hr

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Expected Accuracy Ranges for Cost Estimating
(Same as CAW Estimates)
60
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Expected Accuracy Range for Cost Estimate
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Project Completion
0
-20
Level of Project Definition 10 Project Complete
(Class 4) 30 Project Complete (Class 3) 100
Project Complete (Class 1)
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Regional ProjectCapital and OM Cost Estimates
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Table 7 Estimated Cost Phase 1 DEIR Project
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Table 8 Estimated Costs of Common Facilities
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Table 9 Estimated Costs of Phase 1 Project With
No Surface Water Supply
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Alternative Project Cost Comparisons
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Basis for Cost Comparisons

• Used CAWs MCWDs 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

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Table 10 Comparison of Estimated Costs of DEIR
Based Projects
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Table 11 Comparison of Estimated Costs with no
Surface Water Supply
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Table 13 Sensitivity Analysis
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Regional Project Phase 1 Implementation Schedule