Imported Supply Update

San Gabriel Valley Water Forum

August 28, 2012

Delta

LA Aqueduct

Colorado River Aqueduct Supplies

State Water Project Supplies

Sierra Mtns

Sources of Water for Southern California

Local Groundwater and

Recycling

Conservation

Colorado River Conditions

California 4.4 MAF - Metropolitan .550 MAF - Water Management > .700 MAF

CRACRA

CRA Supply

Upper Colorado Basin Snowpack

10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/10

10

20

30

40

50

60 State of Colorado - Northern Rockies

Snow

Wat

er E

quiv

alen

t (in

)

Source of data: Colorado Basin River Forecast Center, Station JWRC2 – Joe Wright

Average

2011

2012

Sep-02

Sep-03

Sep-04

Sep-05

Sep-06

Sep-07

Sep-08

Sep-09

Sep-10

Sep-11

Sep-12

8,000

9,000

10,000

11,000

12,000

13,000

14,000

15,000

16,000

17,000

18,000

Lake Mead Storage2002 – 2012

MeadSurplusShortage

x 10

00 a

cre-

feet

Probability of Surplus/Shortageon the Colorado River Today

Surplus Shortage

2013 0% 0%2014 6% 0%2015 16% 2%2016 23% 14%2017 26% 23%

Unused / Surplus

Basic Apportionment

IID-SDCWA Transfer All-American Canal

Coachella Canal PVID, Salton Sea Mitigation Supplies, Other*

Storage and Conjunctive Use, Surplus When Available

IID-MWD Conservation

How can we keep the Colorado River Aqueduct full?

After Quantification Settlement Agreement

State Water Project Conditions

2011 Delivery Reliability ReportComparison to Previous Reliability Studies

2005 2007 2009 20110

1,000

2,000

3,0003,298

2,8802,547 2,521

Contract Amount, Surplus and Carryover Supplies

TAF

Per Y

ear

80%Reliability

777 TAF or 24%

Less than 2005

Report61%

Reliability

Regulatory Pumping RestrictionsJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

Delta Smelt

Salmon

Longfin Smelt San Joaquin

Salmon (Potential)

NoRe

stric

tions

Ecological Considerations Reduce Pumping Flexibility

Current as of 1/12/10

2011 Delivery Reliability Report Change To Pumping Patterns

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0

100

200

300

400

500

Average Exports (2005 Report) Average Exports (2011 Report)

Interesting Weather Conditions

Weather Conditions in the News“More than 15,000 warm temperature records broken” -NOAA

“July 2012 being warmest single month on record” -NCDC

“Drought-hit U.S. busts heat record from Dust Bowl days” -Reuters

Record High Temperatures Affect Much of the Country

Drought Heavily Impacting Midwest

Conditions in MWD Service AreaRecent summers have been mild

La Niña weather & cooler ocean temperatures

Lower temperatures impact demands

Temperature at San Bernardino

2010

2011

2012

-10

-8

-6

-4

-2

0

2

4

6

8Difference from 30-Year Average Long-Term Monthly Average Temperature

Degr

ees F

ahre

nhei

t

Temperature at San Diego Airport

2010

2011

2012

-10

-8

-6

-4

-2

0

2

4

6

8Difference from 30-Year Average Long-Term Monthly Average Temperature

Degr

ees F

ahre

nhei

t

Temperature at Los Angeles Civic Center

2010

2011

2012

-10

-8

-6

-4

-2

0

2

4

6

8Difference from 30-Year Average Long-Term Monthly Average Temperature

Degr

ees F

ahre

nhei

t

Temperature at Newport Beach Harbor

2010

2011

2012

-10

-8

-6

-4

-2

0

2

4

6

8Difference from 30-Year Average Long-Term Monthly Average Temperature

Degr

ees F

ahre

nhei

t

Storage Levels Are Rebounding

2006 2007 2008 2009 2010 2011 20120

1

2

3

4

2.2 1.81.1 1.0

1.72.4

2.5-2.8*

Emergency Storage Storage Balance

Mill

ion

Acre

-Fee

tMWD Storage Reserve Levels2012 Based on 60% SWP Table A Allocation

* Projected based on current conditions