San Diegos Water Supply Diversification Accomplishments and Next

San Diego’s Water Supply Diversification Accomplishments and Next Steps Halla Razak Colorado River Program Director August 15, 2013

San Diego County Water Authority �Wholesale water agency created by Legislature in 1944 ◦ 24 member water agencies ◦ 36 -member board of directors �Service area ◦ 950, 000 acres (3, 845 km 2) ◦ Serves 3. 1 million people, $186 billion economy �Builds, owns, and maintains large-scale water infrastructure 2

San Diego’s Water: The Early Years � 1946 – The last year local water supply was able to support San Diego county’s population and economy � 1946 County Population: ◦ 552, 804 ◦ 91% increase from 1940 3

Meeting Demand: Importing Water LAKE SHASTA LAKE OROVILLE ‣ SDCWA became a member agency of MWD in December 1946 ‣ State Water Project (Bay-Delta) MWD supplied water to San Diego from the Colorado River, and later through the State Water Project Colorado River Local Supplies and Conservation 4

Historical Reliance on One Supplier 1991 Supply Portfolio 5% 95% Total = 578 TAF Metropolitan Water District Local Surface Water 55

Drought Hit in 1987 -92: San Diego’s Water Supply Cut Community’s Response: “Never Again!” “No More Water Shortages!” 6 6

Response to Single Source Strategy ‣ Employ resource strategies unique to ‣ ‣ San Diego area No single resource strategy can manage all uncertainties Multi-faceted approach required o Supply diversification o New supplies o Conservation o Infrastructure improvements 7

‣ Water Reliability through Diversification Diversify supply sources o Imported Supply Development § Imperial Irrigation District transfer § Canal lining projects o Local Supply Development § Conservation § Recycling, Recovery, & Reuse § Seawater Desalination All American Canal Lining Project 23 miles of concrete-lined canal 8 Completed in 2010

Water Reliability through Diversification ‣ Invest in regional water delivery, storage, and treatment o $3. 6 billion Capital Improvement Program o Ensure a reliable treatment & delivery system § $2 billion of investments in past decade alone o Protect the region from imported supply cut-off (e. g. earthquake, drought) § $1. 5 billion Emergency Storage Project Pipeline Relining Program 9

Diversify Imported Supply: IID Transfer and Canal Lining Projects IID and Canal Lining Deliveries 2003 -2021 Acre-Feet 300 000 250 000 200 000 IID Water Transfer Canal Lining 150 000 100 000 50 000 0 25. 06. 26. 06. 27. 06. 28. 06. 29. 06. 30. 06. 01. 07. 02. 07. 03. 07. 04. 07. 05. 07. 06. 07. 07. 08. 07. 09. 07. 10. 07. 11. 07. 12. 07. 13. 07. 1905 1905 1905 1905 1905 0: 00: 0 0: 00: 0 0: 00: 0 0: 00: 0 0: 00: 0 0 0 0 0 0 Year 0 0 0 0 0 Calendar 10

Diversify Imported Supply: Salton Sea Mitigation § QSA water transfers reduce agricultural drainage flows to the Salton Sea – Requires Mitigation and Restoration § Formed QSA Joint Powers Authority to manage and implement mitigation projects QSA JPA Financial Obligations Water Agency Contributions QSA JPA Mitigation Salton Sea Restoration Total (2003 Dollars) $133. 0 $30. 0 $163. 0 Total Nominal $374. 9 $67. 4 $442. 3 The state is responsible for all other costs. 11

Diversify Imported Supply: Salton Sea Mitigation Water Calendar Year 2012 2013 2014 2015 2016 2017 Annual Cost Annual Mitigation Water Cumulative Cost $5. 2 Million 45, 000 AF $26. 7 Million $8. 3 Million 70, 000 AF $35. 1 Million $11. 0 Million 90, 000 AF $46. 1 Million $13. 8 Million 110, 000 AF $60. 0 Million $16. 8 Million 130, 000 AF $76. 7 Million $19. 9 Million 150, 000 AF $96. 7 Million Cumulative Mitigation Water 250, 000 AF 320, 000 AF 410, 000 AF 520, 000 AF 650, 000 AF 800, 000 AF § From 2003 -2012, QSA JPA has spent $26. 7 M on a total of 250 TAF mitigation water § Remaining transfers will cost an additional $70 M for 550 TAF through 2017 12

Diversify Imported Supply: Salton Sea Air Quality Mitigation Air Quality Stations 13

Local Supply Development: Water Conservation 70 60 50 40 30 20 10 § Toilets and showerheads § Landscapes 13 § Incentive programs § Surveys and retrofits § Efficiency standards . 0 15 6. . 0 19 17 6. 05. 0 19 6. 05 : 00. 0 19 0 : . . 21 6. 05 : 00. . 0 19 0: : . . . 23 6. 05 00. 0 19 0: : . . . 25 6. 05 00. 0 19 0: : . . . 27 6. 05 00. 0 19 0: : . . . 29 6. 05 00. 0 19 0 : . . 01 6. 05 : 00. . 0 19 0: : . . . 7. 05 00 19 0 : . 05 : 0. . 0 0: : . . 00. : . . . § Multi-decade programs 000 000 0 § 2020: 13% of demand met through local conservation 14

Local Supply Development: Recovery, Reuse, and Recycling § Recycling and Recovery Projects since 1991 § >10 MGD brackish groundwater recovery and desalination § 17 active non-potable recycling projects § 65% increase in recycled water and groundwater supplies by 2020 § Indirect Potable Reuse § Desalination § Carlsbad, Camp Pendleton, Mexico Local supplies to provide ~25% of the region’s water supply by 2020 15

Local Supply Development: Carlsbad Desalination Facility 16

TOVWTP Improvements Pipeline 3 Relining (27, 100 feet) Desalination Plant Current trench work Complete Preparing for tunnel work Current tunnel work Desal Conveyance Pipeline 10 -miles of new 54 -inch pipe Current trench work Aqueduct Connection Facilities 17

Local Supply Development: Carlsbad Desalination Facility 18

Local Supply Development: Carlsbad Desalination Facility 19

Investing in Local Storage: San Vicente Dam Raise Project will increase local storage by 152, 000 AF: 100, 000 AF – Storage for Dry Years 52, 000 AF – Emergency Storage 20

Supply Diversification through 2020 1991 2012 26 TAF (5%) 552 TAF (95%) Total = 578 TAF 80 TAF (13%) 70 TAF (11%) 85 TAF (14%) 2020 24 TAF (4%) 18 TAF (3%) 61 TAF (10%) 190 TAF (24%) 80 TAF (10%) 103 TAF (13%) 274 TAF (45%) 231 TAF (30%) Total = 612 TAF Total = 779 TAF Metropolitan Water District Recycled Water Imperial Irrigation District Transfer Seawater Desalination All American & Coachella Canal Lining Groundwater Conservation Local Surface Water TAF=Thousand Acre-Feet 44 TAF (6%) 56 TAF (7%) 27 TAF (4%) 48 TAF (6%) 21

Next Steps: Challenges to Ensuring Supply Reliability for San Diego Potential for imported supply shortages § § Drought Recurring droughts Regulatory restrictions on SWP deliveries Delta levee failure due to earthquake Limited storage reserves on the SWP Future water demand increases Potential effects of climate change SWP Reliability 22

Next Steps: Assessment of Future Resource Availability Bay Delta Conservation Plan Process The Colorado River Basin Supply and Demand Study § Examines scenarios for future imbalances between supply and demand § Incorporates climate change models 23

Next Steps: Assessment of Future Resource Availability The Colorado River Basin Supply and Demand Study § Provides options to address predicted imbalances such as: § Early development of M&I and Ag. Conservation § Importing water from other river basins, local supplies, water reuse, weather modification and tamarisk control § Incorporates climate change models SDCWA is actively participating in the Study § Currently involved in the Agricultural Conservation & Transfers, and Municipal & Industrial Conservation and Reuse Workgroups 24

Questions Stay in touch with the Water Authority Visit our website: SDCWA. org sdcwa. org/mobile-news-app @sdcwa 25