WSP11096

• File Number: 8273.100
• Description: Colorado River Basin Salinity Control - Federal Agency Reports - BOR
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1998
• Title: Salinity Management Study - Final Report - DRAFT - June 1998 - Part 1 of 2 - Title Page through
• Water Supply Pro - Doc Type: Report/Study

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Duration of blending operations:

A. Initially, through 2004, Metropolitan will practice blending to meet the 500 to I
550 mg/L target during the April-through-September period.

B. In 2004, Metropolitan will assess changes in resource conditions and revise the
blending duration to the extent that supply improvements permit. Metropolitan's long-
term goal is to achieve the 500 to 550 mg/L target on a year-round basis. Success in a
CALFED solution and in developing new storage and exchange arrangements on the
CRA will be important factors to expanding the blending duration beyond 6 months.

USBRIMWD SALINITY MANAGEMENT STUDY
FINAL REPORT

Accomplishment of this objective is estimated to be achievable in 7 out of 10 years. The
ability to meet the objective can be periodically impacted by limited SWP supply availability,
high salinity in imported supplies, and distribution system hydraulic constraints.

(Action Item No.4)

Exchange and Storage

Metropolitan will pursue storage and exchange arrangements along the CRA to minimize the
loss of Colorado River water, periodically curtailed and replaced by SPW to meet salinity
targets.

Metropolitan will coordinate efforts with the Desert Water Agency and Coachella Valley
Water District to increase the amount of Colorado River water it delivers to those agencies
through exchanges for equal quantities of SWP water delivered to Metropolitan on the East
Branch of the SWP. Metropolitan will support the sale of SWP water to Desert and
Coachella for expanded exchanges that have salinity benefits to Metropolitan, when consistent
with Metropolitan's other interests,

(Action Item No.5)

Integration of Water Quality and Quantity

Metropolitan will integrate water quality and quantity objectives in plarming and negotiating
facility resource development. Particular facilities identified in the Salinity Management Study
as in need of additional investigation include:

EJ Facilities needed to better manage the blend ofSWP water in the San Diego Canal and
Eastside Reservoir upon completion of the Inland Feeder;

EJ Expanded capacity of the Rialto Feeder between Devil Canyon and the Etiwanda
Pipeline; and

EJ Future conveyance of blended water to the proposed Central Pool Augmentation
filtration plant.

BOOKMAN-EDMONSTON
ENGINEERING, INC. 5-3
0: ILOCALRES\.ANDYSISALINITYVUNE1998\SECT/ON5.DOC Last printed 07/20/98 11: J I AM

Section 5
Proposed Action Plan

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