Dave Chamberlain, P.E.

October 2003, Colorado River Quantification Settlement Agreement (QSA) executed • 45- to 75-year water conservation and

transfer agreement w/ IID • 110-year canal lining agreement (All

American and Coachella Canals) • 280,200 AFY of Colorado River Supplies • Currently wheeled through MWD System • MWD Exchange Agreement for up to 45 yrs

Previous studies identified two preferred alignments • Jointly studied w/ Mexico • Not pursued after 2003 Master Plan

April 2012 Board direction • Amend Master Plan to include a “Supply

from the East” Alternative 2

Reexamine preferred alignments from previous evaluations • New facility owned and operated by Water Authority Size project for QSA

deliveries only Evaluation approach

• Facility requirements • Energy management • Operational impacts • Compare risks • Project cost refinement • Implementation schedule

Portal

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Land Use • New development along proposed alignments • Change in land ownership or access rights • Changes to permit process

Implementation of New Facilities • San Vicente Dam Raise, Pump Station, and Pipeline not considered

previously. More treatment plants may now be served

Sunrise Powerlink • Provides closer proximity to power and opportunity to reduce costs

Updated Construction Costs • Use current indices to estimate cost of construction

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Characteristic Tunnel Corridor Pipeline Corridor Canal, Miles 12 0 Pipeline, Miles 30 81 Tunnel, Miles 41 11 Total Length, Miles 83 92 Pump Stations (800 ft. lift) 2 5 Power Generating Facilities 0 3

Annual Conveyance

(acre-feet/year)

Design Flow Rate

(cfs)

Pipeline Diameter (inches)

Fully Lined Tunnel Diameter

(inches) 280,200 490 961 120

1. Pipelines are sized to avoid on-peak energy pricing.

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Normal operations allow QSA supply to be delivered to SVR or directly to untreated aqueduct pipelines

QSA deliveries are monthly as one twelfth (1/12) of total annual supply • Approximately 24,000 acre feet/month in

2021 • Analyze wet weather untreated demand

Address potential impact on winter month operations • Consider portion of the QSA supply in winter

months delivered through the MWD system • Identify required operational changes • Drawdown San Vicente and place water in

storage

Salinity Management

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Tunnel Alignment

Pipeline Alignment

MWD Wheeling

Total Capital Cost $1.98 billion $2.30 billion

Annual operating cost $71 million $132 million

Unit cost – capital recovery2

$450/AF

$530/AF

Unit cost – annual operating2 $250/AF $470/AF1

TOTAL Unit Cost (2013 Dollars)2 $700/AF $1,000/AF $453/AF

1 – Includes credit for hydroelectric power generation 2 – Amounts are rounded

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Did not assess feasibility or cost of permitting or environmental mitigation • Cost assumptions and schedule impacts

included in estimates

Time to complete remaining phases • 3 to 4 years for preliminary design, agency

coordination, and environmental compliance • 2 to 3 years for detailed design • 5 to 10 years for construction

Estimate of 10 to 17 years from current project status to bring project online

Final conclusions and recommendation to be included in Master Plan issued later this year • Benefits include avoiding Pipeline 6/expanded

capacity from MWD • Improved conveyance reliability?

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