California Water Supply Overview

Robert ShibataniCEO & Consulting HydrologistThe SHIBATANI GROUP, Inc.

California’s Annual Average Water Summary (MAF)

1998(171% of normal)

WET

2000(97% of normal)

NORMAL

2001(72% of normal)

DRY

Total Supply (P & Imports)

336.9 194.7 145.5

Total Use, Outflows, & E/ET

331.5 200.4 159.9

Net Storage Change 5.5 -5.7 -14.3

Distribution of Dedicated Supply

Urban Uses 7.8 (8%) 8.9 (11%) 8.6 (13%)

Agricultural 27.3 (29%) 34.2 (41%) 33.7 (52%)

Environmental 59.4 (63%) 39.4 (48%) 22.5 (35%)

Total Dedicated Supply 94.5 82.5 64.8

Hydrological perspective – California is not water short

Allocation and Conveyance

Managing within existing infrastructure

Managing within existing environmental constraints

Storage in Major CVP Reservoirs (TAF) – October 26, 2009

Reservoir Capacity 15 Yr Average

WY 2009 WY 2010 % of 15-Yr Average

Trinity 2,448 1,564 1,052 908 58

Shasta 4,552 2,590 1,302 1,730 67

Oroville (SWP) 3,538 2,029 1,059 1,306 64

Folsom 977 477 243 365 76

New Melones 2,420 1,596 1,103 1,112 70

Fed. San Luis 966 367 92 305 83

Millerton 520 230 176 349 152

Total CVP 11,360 6,595 3,792 4,420 67

Major Reservoir Releases (cfs) – October 26, 2009

Watershed Dam WY 2009 WY 2010 15-Yr Median

Trinity Lewiston 473 291 300

Sacramento Keswick 6,970 5,850 5,850

Feather Oroville 1,700 2,000 2,400

American Nimbus 1,006 1,797 1,883

Stanislaus Goodwin 470 1,255 695

San Joaquin Friant 180 351 176

Accumulated Precipitation for Water Year to Date (inches) – October 26, 2009

Reservoir Current WY 2010

Driest WY 1977

Wettest WY 1983

Ave(N Yrs)

% of Ave

Last 24 Hours

Trinity at Fish Hatchery

1.85 0.20 1.97 1.21(47)

153 0.00

Sacramento at Shasta

6.16 0.07 2.26 1.91(52)

323 0.00

American at Blue Canyon

5.34 0.87 5.06 1.97(34)

271 0.00

Stanislaus at New Melones

2.35 0.00 2.06 0.86(31)

272 0.00

San Joaquin at Huntington Lake

0.00 1.20 1.90 1.20(34)

0 0.00

ANADROMOUS FISH SMELT/STRIPED BASS

CVP-OCAP uncertainty RPAs on both DOI/DOC

BiOps Salvage monitoring at the

pumps OMR flow monitoring

Pending Judge O. Wanger Decisions

Ongoing BDCP FLOODSafe

Long-term threats? Reduced Exports Increasingly stringent In-

Delta WQ standards Standard Term 91 Federal Shortage Policy

changes (M&I and Ag) Accommodations for flood

control Climate change effects What does it all mean to

water purveyors?