San Gabriel Valley Water Forum

August 28, 2012

San Gabriel Valley’s Water SupplyA Plan for the Future

Delta

LA Aqueduct

Colorado River

Aqueduct Supplies

State Water

Project Supplies

Sierra Mtns

Local Groundwater and Recycling

Conservation

Southern California’s water supply… we are dependent on a very large system beyond our control

Lake Mead

The Colorado River

4

SacramentoSacramento

SJ River

SJ RiverSWP PumpsSWP Pumps

CVP PumpsCVP Pumps

Sac RiverSac River

StocktonStockton

Sacramento-San Joaquin Bay Delta…difficult and expensive to fix but absolutely necessary

Our greatest resource…the Upper Area of the San Gabriel River Watershed

Recent trends in the health of the groundwater supply we depend upon…

Our water supply in the year 2035 if we do nothing more…

Firm GW & Surface Water Recycled Water ConservationNew Stormwater Capture Water Transfers & Storage MWD WaterPotential MWD Shortage

Reliance on imported water will be33%

Today

By 2035

8

Single Family Monthly Water Rate

1 HCF = 100 cubic feet = 748 gallons of water15 HCF: average monthly water consumption for single family residential

2003 2005 2007 2009 2011$0

$10

$20

$30

$40

$50

$60

$70

$80

San Gabriel ValleySan Diego County

Dol

lars

per

mon

th fo

r 15

hun

dred

cub

ic fe

et (H

CF)

Cost of Groundwater Replenishment (imported water dollars per acre-foot)

2007 Untreated Replenishment 2012 Tier 2 Untreated $0

$100

$200

$300

$400

$500

$600

$700

$800

$238

$686Drought in the Colorado River Basin and in California , along with regulatory restriction on pumping in the Bay Deltacontributed to a 188 % increase in the cost of replenishing groundwater with imported water

… a balanced portfolio of reliable water supplies taking into account, cost, risk, water quality, the environment, climate change and stakeholder input.

What is an Integrated Resources Plan?

0

25,000

50,000

75,000

100,000

125,000

150,000

175,000

200,000

225,000

250,000

Demands Existing Supplies

Acre

-Fee

t

Allocated MWD Firm Supply

Existing Recycled Water

Surface Water (dry year)

Groundwater w/o replenishment

Shortage33,000 AF (15%)

Expected to occur1 in 10 years

Demand and Supply in 2035 … under a repeat of 2009 drought with no investments

Provide Reliable Water SupplyAccounts for droughts, climate change and restrictions in Delta exports due to environmental regulations

Develop Cost-Effective Solutions Accounts for all life-cycle costs, capital and O&M

Increase Local Control of Supply Accounts for dependence on imported water

Meet Water Quality Regulations & Achieve Basin Goals

Accounts for both drinking water regulations and groundwater basin goals

Improve Natural EnvironmentAccounts for receiving water quality (e.g., TMDLs) and greenhouse gas emissions

Reduce Risk of ImplementationAccounts for regulatory issues and public acceptance/participation, and flexibility once built

Integrated Resources Plan Objectives

32

20 1914

8 80

10

20

30

40

50

60

70

80

Reliability Cost-Effectiveness

Local Control Water Quality Environment Implementation

Obj

ecti

ve W

eigh

t (%

)

IRP Objectives

Average Weight

Stakeholder Objective Weights

Option Category

BenefitsDrought

ProofClimateChange

BasinWQ

20x2020Goal Flexible

TMDLBenefits

Indirect Potable Reuse

Non-Potable Recycled

Centralized Stormwater

Decentralized Stormwater

Water Transfers/GW Storage

MWD Imported Water

New Water Conservation

– Strong benefit – Moderate benefit – Little to no benefit

How do the different water supply options compare?

Comparing Status Quo with Preferred Alternative Supply Portfolio in 2035

Firm GW & Surface Water Recycled Water ConservationNew Stormwater Capture Water Transfers & Storage MWD WaterPotential MWD Shortage

Reliance on MWD Water is33%

Reliance on MWD Water is17%

Status Quo Preferred Alternative

The Future is about balancing risk factors and opportunities …we have many opportunities.

Risk Factors OpportunitiesClimate Change Invest in Water Supply

Reliability –stormwater capture, recycling and conservation

Bay Delta Water Transfers, Storage, recycling, conservation and stormwater capture

Increasingly Stringent Drinking Water Quality Standards

Sound Science and investments in water treatment technology

Rising Cost of Energy Water Conservation and stormwater capture

Questions

Shane ChapmanGeneral Manager

Upper DistrictShane@usgvmwd.org