Imported Water Committee August 23, 2012

Department of Water Resources oversees management of the State Water Project’s supply and delivery system

Reliability Report prepared as a result of the state’s obligation set forth in the 2003 Monterey Settlement

Reliability Report provides: Overall water delivery capacity of the SWP facilities Allocation of SWP water Discussion of the range of hydrologic conditions Historic SWP water delivery (prior 10 years)

2

29 SWP Contractors receive Annual Allocations

Largest Table A amount held by MWD at 1.91 MAF (or 46%)

SWP contractors repay principal and interest on bonds and maintenance and operation costs

3

MWD 1.91 MAF

28 Other Agencies 2.26 MAF

Water availability at the source Water rights with priority over the SWP Regulatory restrictions on SWP Delta exports Climate change Environmental and policy planning efforts Delta levee failure

4

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

5

SWP Delivery Year

39%

70%

90%

65%

90% 100%

60%

35% 40%

50%

X% = Table A Allocation

= Historical Delivery = Estimated Average Delivery

80%

Maximum Possible SWP Table A Delivery (4,133 TAF/Yr)

10-Yr Avg Delivery (2001-2010)

2,958 2,736

2,597 2,607 2,818

2,595 2,483 2,524

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

2005 2007 2009 2011

Annual Delta Exports (inc. Article 21 Water)

Annual Table A Deliveries

TAF/

Yr

Maximum Possible SWP Table A Delivery (4,133 TAF/Yr)

6 Delivery Reliability Reports

Implementation of 2007 Federal Court

Decision of Remedy Action for

Delta Smelt

Changed conditions imposed under

Biological Opinions USF&WS (2008) and

NMFS (2009)

Impacts Unchanged from 2009

7 Delivery Reliability Reports

0

500

1,000

1,500

2,000

2,500

3,000

3,500

2005 Report 2007 Report 2009 Report 2011 Report

TAF/

Yr

2,521

3,298 2,880

2,550 80 % Reliability

61 % Reliability

0

5

10

15

20

25

30

35

40

500-1,000 1,000-1,500 1,500-2,000 2,000-2,500 2,500-3,000 3,000-3,500 3,500-4,000 4,000-4,106 More than 4,106

Existing Conditions

Future Conditions

Annual Exports (thousand acre-feet)

Like

lihoo

d of

Deli

very

(%)

Note: Maximum Annual SWP Exports from the Delta is 4,133 MAF

Approximately 79% chance of annual Delta exports of

2,000-3,500 thousand acre-feet under existing conditions, reduced to

approximately 76% under future conditions

The report illustrates “The need for local agencies to develop a resilient and robust water supply, and a distribution and management system to maximize the efficient use of our variable supply” and “the urgent need to improve the method of conveying water past the Delta in a more sustainable manner that meets the dual goals of increasing water delivery reliability and improving conditions for endangered and threatened fish species.”

-- DWR Director Mark Cowin

9

Future SWP deliveries average about 61% of the contracted amount (including Article 21 and carryover supplies)

MWD’s 2010 UWMP and the Table A 2030 volumes are consistent with the 2011 Report results for 2031.

DWR will continue to perform assessments of SWP supplies and operations Next SWP Delivery Report will be released in 2014 Water Agencies to prepare 2015 Urban Water Management Plan

Updates

Staff will continue to monitor and report to the Board actions that could affect imported water

10

12

Estimated Future SWP Exports (TAF)

Water Year Type 2009 Report 2011 Report

Wet 3,196 (77%) 3,182 (77%)

Above Normal 2,734 (66%) 2,753 (67%)

Below Normal 2,557 (62%) 2,556 (62%)

Dry 2,173 (53%) 2,120 (51%)

Critical 1,526 (37%) 1,414 (34%)

Average 2,550 (62%) 2,521 (61%)