Transcript Slide 1

San Diego County
Water Issues
2010 Update
Seawater Desalination for San Diego
Maritime Business and Technology Summit
November 16, 2010
Water Authority Background

Wholesale water agency
created by state Legislature
in 1944
◦ 24 member agency water districts, cities
and one military installation: Camp
Pendleton
◦ 36-member board of directors
◦ Serves 3.2 million people and region’s
$174 billion economy
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Service Area
◦ 920,000 acres
◦ 97% of county’s
population
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Regional Water Supply Diversification
5%
3%
13%
95%
2020
2011
1991
5%
12%
7%
4%
11%
6%
10%
17%
6%
9%
23%
52%
22%
Metropolitan Water District
Conservation (per 2005 UWMP Goal + SBX 7-7)
Imperial Irrigation District Transfer
Seawater Desalination
All American & Coachella Canal Lining
Local Surface Water
Dry-Year Water Transfers
Recycled Water
Groundwater
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Why Desalination?
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Water supply diversification
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Cost-competitive with other new supplies
Climate-independent local water supply
Reduces reliance on increasingly constrained imported
water supplies
Successful implementation worldwide
Marginal Cost of the Next Increment
of Local Supply
(Actual Proposed San Diego Region Project Unit Costs)
Mission Basin Narrows
$1,717
Otay River
$2,086
North City IPR *
$2,190
(2005$)
El Monte Valley IPR *
$2,300
$1,900
Camp Pendleton
Desalination
$2,340
(100 mgd)
0
500
1,000
1,500
2,000
(50 mgd)
2,500
$/AF
Brackish Groundwater
Indirect Potable Reuse
Seawater Desalination
* Cost of re-treatment not included 5
Seawater Desalination Process
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Carlsbad Desalination Project
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50 mgd desalination project being developed by Poseidon
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Water Authority would be sole purchaser of water
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Project is fully permitted
Included in 2005 Water Authority Urban Water Management
Plan
Term Sheet between Water Authority and Poseidon approved
by the Board on July 22
Risk transfer to Poseidon
WPA pre-negotiation activities
under way
On-line in 2013
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Proposed Camp Pendleton
Desalination Project
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Proposed project is a 50 -150
mgd desalination project
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Construct in phases over time
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MOU executed with Marine
Corps to continue with
planning/technical studies
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New intake and discharge
infrastructure required
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Next phase of study under way
Located in the sw corner of
Camp Pendleton
Earliest on-line date is late 2020
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Rosarito Desalination Plant
Feasibility Study
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Colorado River water supply
augmentation
Completed Feasibility Study (Phase 1)
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No Fatal Flaw Found
Environmental Permitting would be
challenging
Next Phase (Phase 2)
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Detailed site analysis, conveyance
alternatives, refine cost estimates and
review product water exchange w/ MX
Decision on whether to pursue Phase 2
expected this year
Otay Water District also pursuing a
similar project at the power plant site
ROSARITO
POWER PLANT
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Desalination Technology
Innovation on the Horizon
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Expanded use of large diameter RO membranes
Continued improvement in RO isobaric energy
recovery
Application of nano-technology to RO membranes
Use of renewable energy generation for desalination
 Ocean-related energy technologies
 Osmotic power (related application)
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Questions?
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