The Bay DeltaThe Heart of California’s Water System

Bay Delta Conservation Plan Briefing

October 5, 2013

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Paul HellikerDeputy Director

CA Department of Water Resources

Areas of California served by water supplies from the Delta.

Over 24 million people depend on the Bay-Delta system for drinking water (two-thirds of the State’s population).

2.5 million acres irrigated at least in part by water from the Delta, supporting California’s $27 billion agricultural industry.

Water Supplies

DWR, 2010

California Snowpack Predictions

- 20 ft.

- 5 ft.

- 15 ft.

- 25 ft.

Below Sea Level

-30 -20 -10 -5 ft

Delta Islands Below Sea Level

Data from DFG GrandTab 2012 Report

Data from DFG GrandTab 2012 Report

Source: DFW

• Subsidence

• Earthquakes

• Climate Change

• Declining Species

• Regulatory Uncertainty

“64% chance of catastrophic failure due to earthquake or storm in the next 50 years.”

Delta Challenges

Over 100,000 Acres of Restored

and Protected Habitat

Monitoring and Adaptive

Management

50 YearEcosystem-Based Plan

ESA-HCPNCCPA-NCCP

New North Delta Conveyance

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Bay Delta Conservation Plan

• Large Scale Restoration • Alternative Conveyance

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BDCP Fundamental Components

Habitat RestorationWater Facilities and

& Operations

Other Stressors

22 Conservation Measures

200 Biological Goals and Objectives for 56 species11 of which are aquatic species

111

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BDCP Conservation Strategy

• 65,000 acres of Restored Tidal Habitat

• 10,000 acres of Restored Floodplain

• 20 Levee Miles Restored Channel Margin

• Enhanced Floodplain Habitat in the Yolo Bypass

• Thousands of acres of Restored and Protected Riparian & Terrestrial Habitat

• More than 100,000 acres of Restored and Protected Habitat in the Delta over 50 Years• Up to 30,000 acres of restored habitat

in next 15 years

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Habitat Restoration Goals

Gravity Flow Benefits Include:• Reduced

energy consumption and greenhouse gas emissions

• Installation of fewer transmission lines

Preliminary Draft – Subject to Change

• Gravity flow • Three proposed intakes and three

proposed pumping plants for a total of 9,000 cfs capacity

• Three state-of-the-art fish screens held to performance standards to protect passing fish

• Intermediate Forebay for temporarily storing the water pumped from the river

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Current Proposal

Dual Conveyance with Pipeline/Tunnel

• Two tunnels to carry water 35 miles to the existing pumping plants in the south Delta, where it would be moved into existing aqueducts

• 840-acre forebay at Byron Tract

• Total power requirement-50 MW

• Continued use of South Delta SWP/CVP facilities

Preliminary Draft – Subject to Change 15

Current Proposal continued

Dual Conveyance with Pipeline/Tunnel

• Reduce forebay from 750 to 40 acres

• Reduce tunnel shafts from 7 to 5

• Move alignment east –away from towns

• Reduce height of pump buildings from 60 to 30 feet

New Alignment

Preliminary Draft – Subject to Change

10/1/2013 DRAFT - Not for distribution

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Shasta End of September Storage

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Evaluation

• 3,000 cfs tunnel option is covered in the BDCP EIR/S• Economic calculations of the cost/benefit of the portfolio proposal addressed

in Chapter 9 of the BDCP and accompanying documents• Other water use efficiency and supply alternatives (recycling, desalination)

are being facilitated in IRWM and regulatory programs

Problems

• Does not meet long-term needs/co-equal goals – reliability for all Delta diversions

• Has negative cost/benefit ratio• Does not address reverse flows and south Delta restrictions• Reduces habitat restoration by 60%• Cost estimates for local water supply offsets are significantly low• Funding source for local water supply projects is not identified

Response to NRDC Proposal

Alternative Description Total Benefits and Costsa, b

AlternativeFacility

Size (cfs)Deliveries

(MAF)Total

Benefitsc Total Costsd

Net Benefits

BDCP Proposed Action High-Outflow 9,000 4.705 $18,011 $13,328 $4,684BDCP Proposed Action Low-Outflow e 9,000 5.591 $18,795 $13,343 $5,452A: W Canal 15,000 cfs 15,000 5.009 $23,820 $10,789 $13,030B: Tunnels 6,000 cfs 6,000 4.487 $14,967 $12,123 $2,844C: Tunnels 15,000 cfs 15,000 5.009 $23,820 $15,381 $8,438D: Tunnels 3,000 cfs 3,000 4.188 $8,918 $10,039 -$1,121E: Isolated 15,000 cfs 15,000 3.399 -$7,531 $15,436 -$22,967F: Through Delta N/A 4.172 $9,301 $4,887 $4,415G: Less Tidal Restoration 9,000 4.705 $18,011 $13,146 $4,865H: More Restoration 9,000 4.705 $18,011 $13,219 $4,792I: More Spring Outflow 9,000 4.338 $13,508 $13,182 $326Notes:

a Construction is assumed to begin in 2015. BDCP operations are assumed to begin in 2025.b All values are in 2012 $ (millions), and are discounted to present value using 3% real discount rate.

c Benefits are calculated out to year 2075. d Costs are calculated out to year 2075.e Benefits for the BDCP Proposed Action Low-Outflow Scenario are calculated relative to the Existing Conveyance Low-Outflow

Scenario, which assumes Scenario 6 operations, no Fall X2, no north Delta diversions.

cfs = cubic feet per second; MAF = million acre-feet

Present Value Benefits and Costs ($ millions)

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Hetch Hetchy Seismic upgrade: $4.5 billion This retrofit includes replacing pipes over SF Bay with a tunnel, a new dam

and upgrade of water treatment facilities.

Source: Mountain Cascade Inc.

Photo: abc News

Project Cost Population Served

Per capita cost

MWD Diamond Valley Lake / Inland Feeder $3,100,000,000 18,000,000 $172

EBMUD $517,000,000 1,300,000 $398

SDCWA Emergency Storage Project $1,500,000,000 2,800,000 $536

BDCP 14,700,000,000 25,000,000 $588

CCWD Los Vaqueros Project $570,000,000 550,000 $1,036

SWP Coastal Aqueduct and CCWA Project $575,000,000 430,000 $1,337

SFPUC’s Hetch Hetchy Project $4,600,000,000 2,500,000 $1,840

Water Investment Projects

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Water Action Plan

• Brown Administration’s Action Plan for Next Five Years

• Addresses Storage, Conservation/Local Projects, Transfers, Flood Management, Water Quality, Etc.

• Complements Delta Conveyance and Ecosystem Restoration