san diego county water issues 2010 update maritime business and technology summit november 16, 2010...
TRANSCRIPT
San Diego County Water Issues 2010 Update
Maritime Business and Technology SummitNovember 16, 2010
Seawater Desalination for San Diego
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
Service Area◦ 920,000 acres◦ 97% of county’s
population
2
5%
Regional Water Supply Diversification
3
Metropolitan Water District
Imperial Irrigation District Transfer
All American & Coachella Canal Lining
Conservation (per 2005 UWMP Goal + SBX 7-7)
Seawater Desalination
Local Surface Water
Recycled Water
Groundwater
2011 20201991
95%
23%
22%
6%
Dry-Year Water Transfers
7%
6%
9%
10%
17%
52%
12%
13% 3% 5%4%
11%
Why Desalination?
Water supply diversification
Climate-independent local water supply
Reduces reliance on increasingly constrained imported water supplies
Cost-competitive with other new supplies
Successful implementation worldwide
0 500 1,000 1,500 2,000 2,500
Camp PendletonDesalination
El Monte Valley IPR *
North City IPR *
Otay River
Mission Basin Narrows
$/AF
Marginal Cost of the Next Increment
of Local Supply (Actual Proposed San Diego Region Project Unit Costs)
Brackish Groundwater
Indirect Potable Reuse
Seawater Desalination
$1,717
$2,086
$2,190
$2,300
$2,340
* Cost of re-treatment not included
(2005$)
5
$1,900
(100 mgd) (50 mgd)
50 mgd desalination project being developed by Poseidon
Project is fully permitted
Included in 2005 Water Authority Urban Water Management Plan
Water Authority would be sole purchaser of water
Term Sheet between Water Authority and Poseidon approved by the Board on July 22
Risk transfer to Poseidon
WPA pre-negotiation activitiesunder way
On-line in 2013
Carlsbad Desalination Project
7
Proposed Camp Pendleton Desalination Project
8
Proposed project is a 50 -150 mgd desalination project
Construct in phases over time
Located in the sw corner of Camp Pendleton
MOU executed with Marine Corps to continue with planning/technical studies
New intake and discharge infrastructure required
Next phase of study under way
Earliest on-line date is late 2020
9
9
Rosarito Desalination PlantFeasibility Study
Colorado River water supply augmentation
Completed Feasibility Study (Phase 1)
No Fatal Flaw Found Environmental Permitting would be
challenging
Next Phase (Phase 2)
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
Desalination Technology Innovation on the Horizon
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)
10