Overview of Regional Seawater Desalination in San Diego County by Bob Yamada, Water Resources Manager for the Water Authority. Presented at Water Talks: New Challenges, New Supplies on September 13, 2011.

1. Regional Seawater Desalination
Bob Yamada, Water Resources Manager
September 13, 2011 1

2. Seawater Desalination Process
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4.  Key high-reliability / high volume local component
of the region’s supply diversification strategy
 Reduces reliance on increasingly constrained and
uncertain imported water supplies
o Bay Delta
o Colorado River
 Cost-competitive with
other new local
water supplies

5. Cost of the Next Increment of Local Supply
Actual Proposed San Diego Region Project Unit Costs - $/AF
(Before incentives, grants, or netting out avoided costs)
Carlsbad (Poseidon)
~ $1,800
(2011$)
Mission Basin Narrows
$1,700
Otay River
$2,100
North City IPR *
$2,190
(2005$)
0 500 1,000 1,500 2,000 2,500
$/AF
Brackish Groundwater
Indirect Potable Reuse
Seawater Desalination
* Cost of re-treatment not
included
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6.  50 mgd desalination project being developed by Poseidon
 Project EIR certified; fully permitted
 Term Sheet executed between Water Authority and Poseidon
 Water purchase agreement negotiations to be completed
o Awaiting Carlsbad Council action tonight on an agreement with the Water Authority
o Public Board workshop process planned
 Project to connect to Water
Authority Aqueduct
 Poseidon finalizing EPC
contract with Kiewit - J.F. Shea Proposed Carlsbad
Desalination Plant
- IDE Team
 Online – 2015/2016
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7.  Unique coastal site in Northern San Diego County
 Feasibility Study recently
completed
o 2 Viable Sites on MCBCP
o 50 to 150 mgd ultimate capacity
o Both subsurface and open intake
options being evaluated
 Planning MOU with MCBCP
executed
 Further Studies Underway
o Intake Evaluation
o Additional Site Planning
o Conveyance Alternatives
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8.  Colorado River water supply
augmentation
 Completed Feasibility Study
(Phase 1)
o Co-funded by:
• Water Authority
• MWD
• Southern Nevada WA
• Central Arizona WC District
o No Fatal Flaw Found ROSARITO
POWER PLANT
 Next Phase (Phase 2)
o Detailed site analysis, conveyance
alternatives, refined cost estimates and
review product water exchange w/ MX
o February 2011 – Water Authority Board
authorized proceeding to Phase 2
o Currently negotiating a funding agreement
with funding partners
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9.  Visit our website: sdcwa.org
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