Hetch Hetchy Valley:

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ENVIRONMENTAL DEFENSE

• Hetch Hetchy Valley
• Water and Californias Future

The California Colloquium on Water September 13,
2005
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Pictures trump words
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A wonderfully exact counterpart
Wapama Falls
Yosemite Falls
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Tuolumne River Hetch Hetchy Valley 1908
Merced River Yosemite Valley 2004
HETCH HETCHY SOLUTIONS
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Hetch Hetchy Reservoir
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SFPUC serves 2.4 million Bay Area residents
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Questions about restoration

• Why now?
• Is it technically feasible?
• Where will we get our water?
• Will it be safe to drink?
• How can power be replaced?
• Are there legal/institutional barriers?
• How much will it cost?

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An Environmental Defense Study with expert
assistance

• Engineering Schlumberger Water Services, Inc.
• Water Quality EOA, Inc.
• Legal Issues Somach, Simmons Dunn

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SFPUC System Overview
2000
1500
Don Pedro
Water Rights
1000
000 Acre Feet
Cherry-Eleanor
500
Hetch Hetchy
Bay Area
0
Annual Average
Drought Average
Demand
Surface Storage
(1922-1994)
(1987-1992)
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TID and MID System Overview
2000
1500
Lower Tuolumne River
Water Rights
Flow Requirements
1000
000 Acre Feet
500
Consumptive Use
0
Annual Average
Drought Average
Demand
Don Pedro Storage
(1987-1992)
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Diverting Tuolumne River Supplies Without Hetch
Hetchy Reservoir

• Run-of-River Diversions
• New Interties
• Below Cherry Reservoir
• From Don Pedro Reservoir

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Delivering Water without Hetch Hetchy Reservoir
Adequate Precipitation 4 out of 5 years
Critically Dry Years 1 out of 5 years
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New Dry Year Supply Sources
New Supplies 4

• Groundwater banking
• Water transfers
• New local storage

Existing Sources 96
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Maintaining high water quality

• All Tuolumne supplies would be filtered
• Additional treatment needed for Delta and local
  reservoirs
• Safety may improve

HETCH HETCHY SOLUTIONS
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SFPUC Hydro Facilities
Kirkwood
Moccasin
Holm
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Hydropower falls 20-40
Million KWh
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Power Alternatives

• Energy efficiency
• Dynamic pricing
• Renewable energy
• Natural gas

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Water and Power Replacement Costs
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Key Findings

• Water
• Same source for almost all supplies
• Some new supplies needed in dry years (4 avg.)
• Same or better quality with filtration
• Power
• 20-40 reduction in generation
• Abundant green alternatives
• Cost .5 - 1.6 billion (NPV)

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Real choices for the 21st century
HETCH HETCHY SOLUTIONS
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Water Storage in Context millions of acre-feet
More than 6.2 million acre-feet of storage
capacity have been added since 1990!
Hayfield, 0.80
Semitropic,
1.65
Arvin-Edison ,
0.35
Kern, 2.50
Diamond
Los Vaqueros,
Valley, 0.80
0.36
0.10
Hetch Hetchy
New Storage
(since 1990)
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Water Supply Effects of Restoration
Programs Central Valley Project Improvement Act
(1992)
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Water Supply Effects of Restoration Programs
Bay-Delta Accord (1994)
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Water Supply Effects of Restoration Programs
Trinity River Restoration Program (2000)
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Water Supply Effects of Restoration Programs
Mono Lake Decision (1994)
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Water Supply Effects of Restoration Programs
Hetch Hetchy Valley (20??)
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Water Supply Effects of Restoration Programs
Summary
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www.discoverhetchhetchy.org