Water for Southern California: How Bay-Delta is Key to

“All of the Above” Strategy

Stephen N. Arakawa Manager, Bay-Delta Initiatives The Metropolitan Water District of Southern California October 15, 2016

California WaterFix: Securing Water Supplies for California

Enhances supply reliability and Delta ecosystem

Supports Southern California’s local resources

Modernizes the State Water Project and addresses flaws since its creation

Protects billions of dollars of past investments made by Southern California

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California’s Current Drought Conditions

Exceptional Drought 21%

Extreme Drought 22%

Severe Drought 20%

Moderate Drought 21%

Abnormally Dry 16%

US Drought Monitor As of October 13, 2015

US Drought Monitor As of October 11, 2016

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Metropolitan Water District

Regional water wholesaler

26 Member Agencies

6 counties

Serving ~19 million residents

5,200 square mile service area

$1 trillion economy

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Bay-Delta: Critical Component of Metropolitan’s Diverse Water Supplies

Southern California Water Portfolio

– 25% Colorado River

– 30% State Water Project (through the Delta)

– 45% Local Supplies

• Los Angeles Aqueduct

• Conservation

• Groundwater

• Recycling

• Desalination

Los Angeles Aqueduct

Colorado River Aqueduct Conservation,

Local Groundwater, Recycling and Desalination

State Water Project

Bay-Delta Bay Area

33%

Central Valley 23 to 90%

Metropolitan – 30%

Some regions 100% dependent on Bay-Delta supplies

Central Coast 37%

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Heavy dependence on imported supply and SWP Diversions

Emphasis on Conservation, Local Supplies, and Storage & Transfers

State WP (20%)

Colorado (15%)

Local Supply (32%)

Conservation & Recycling

(33%)

State WP (33%)

Colorado (27%)

Local Supply (34%)

Conservation & Recycling

(7%)

Diversification of Water Portfolio (Average Year)

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Metropolitan’s Water Portfolio: Supplies and Demand Management

Conservation State Water Project Colorado River

Recycling Groundwater

Recharge Desalination

Stormwater Management

Delta: Hub of California’s Water Supply

Supplies 25 million Californians with SWP water

Provides irrigation for much of produce grown domestically

57 Islands and Tracts

700 miles of sloughs and channels

1,100 miles of levees

Impacts to California

Statewide

Bay Area

Central Valley

Central Coast

Southern California

Economy Global

Statewide

Regional

Sectors Agriculture

Environment

Urban

Contra Costa

County

Silicon Valley

Southern

California

Central

Valley

Water Flowing from Delta Watershed

Source: Delta Vision Report (2007) Time Period: 1990-2005 Estimated total annual runoff 32.85 maf

Pacific Ocean 48%

Upstream Consumptive Use

31%

Delta Exports 17%

Metropolitan

4%

In-Delta Consumptive Use 4%

Highly-Altered Ecosystem

Gold Rush Flood Control Agriculture Introduction of Non-Native Species Subsidence Urbanization Loss of Habitat Salinity Intrusion Sea-level Rise Earthquakes Fish Conflicts

Chronic Impacts and Long-Term Risks State Water Project Supplies

Chronic Impacts

Fisheries conflict

Pumping restrictions

Non-native species

Ag/Urban discharge

Food web impacts

Long-Term Risks

Seismic

Sea-level rise

Subsidence

Sacramento/San Joaquin Bay-Delta

Sacramento River

San

Joaquin

River

Sacramento River/

West Delta

Sacramento

Stockton

SWP Pumps

CVP Pumps 13

Diverse Alternatives Analyzed

• Various seawater barriers (Biemond Plan, Reber Plan, etc.)

1930-50s

• Chipps Island barrier • Peripheral canal (21,800 cfs) • Through-Delta

1960-70s

• Peripheral canal + SB200 • Duke’s Ditch (Through-Delta)

1980s

• South & North Delta Programs • Bay Delta Accord • CALFED Plan (~ 19 alternatives, storage, etc.) • Post-CALFED Thru-Delta focus (>26 alternatives)

1990-2000s

• BDCP - Multiple Initially Screened & 19 EIR/S Alts

Recent

2009 Delta Reform Act

Comprehensive Delta Plan

Co-equal Goals for the Delta

Water supply reliability

Ecosystem restoration

State’s Proposal

Protects State’s water supplies through Delta system upgrades

Dual tunnel facilities and mitigation

Water-user funded

Supports long-term health of native fish and wildlife

Habitat restoration

– ~ 30,000 acres in 5 years

Requires broader public funding

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Tunnels

California WaterFix

SWP Pumps

CVP Pumps

Additional Intakes

Modernizing the State Water Project Designed to meet the state’s mandated

co-equal policy goals

Water security

Improved reliability

Seismic safety

Environmental protection

Climate change adaptation

Right size

Flexibility to capture flows during wet period runoff events

Cost

Paid by water users

~$5/month/house (urban)

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California Water Fix Improved Water Quality

Colorado River 650 mg/l

Sacramento River 100 mg/l

SWP (Existing) 302 mg/l

SWP (CA Water Fix) 221 mg/l

(27% improvement)

San Joaquin River 320 mg/l

• Sacramento, San Joaquin & Colorado River water quality represents historical average annual recorded data • State Water Project water quality is comparison of modeled data from the Recirculated Draft EIR/EIS

State Water Project Essential Baseline for Southern California

Drought reserves

Groundwater replenishment

Southland’s highest quality supply

– Promotes recycling

– Helps manage salinity

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Diamond Valley Lake (100% SWP Water)

Metropolitan’s Investments in Delta-Related Supplies

State Water Project

Construction

Nearly 50 years of maintenance

Diamond Valley Lake

Inland Feeder

Water treatment processes

Sustaining Our Cities

Providing Local Groundwater

Promoting Local Supplies

Surviving Droughts

Capturing the Storms

Five Benefits for Los Angeles County

California WaterFix

Key Decisions

On the verge

Environmental Documents

Endangered Species Act Permits

Approaching

New Diversion Permit

U.S. Army Corps of Engineers Permits

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What Can You Do?

Know the facts

Get involved

Promote the need for SWP/Delta solution

Inform community and political leaders on significance of supply to region

Time for Action

Benefits

– Advance statewide water reliability

– Protect Investments

– Minimize rate increases

– Modernize the system

– Protect groundwater basins

– Promotes local supplies

Can’t afford to delay Stephen N. Arakawa

sarakawa@mwdh2o.com mwdh2o.com Bewaterwise.com

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