WORKING PAPER NO.  19
                      COLUMBIA RIVER BASIN PROJECT
              For Water Supply and Water Quality Management
                  PRELIMINARY INVESTIGATION OF WATER
               SUPPLY AND WATER QUALITY CONTROL ASPECTS
                      YAKIMA PROJECT,  WASHINGTON
                     KENNEWICK DIVISION EXTENSION
DATE:  December 1961

Prepared by 	

Reviewed by 	

Approved by 	
DISTRIBUTION
Project Staff
Cooperating Agencies

General
          U.S. DEPARTMENT OF HEALTH,  EDUCATION,  AND WELFARE
                         Public Health Service
                               Region  IX

            Division of Water Supply and Pollution Control
                        Room 570 Pittock Block
                          Portland 5,  Oregon

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This working paper contains  preliminary  data and  information



primarily intended for internal use  by the Columbia  River



Basin Project staff and cooperating  agencies.  The material



presented in this paper has  not been fully evaluated and



should not be considered as  final.

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      REPORT ON YAKIMA RIVER BASIN STUDIES
       PRELIMINARY INVESTIGATION OP WATER
    SUPPLY AND WATER QUALITY COMTROL ASPECTS
           YAKIMA PROJECT, WASHINGTON
          KENHEWICK DIVISION EXTENSION
         Prepared at tho Request of the
        Regional Director,  United State*
             Department of  Interior
            .  Bureau oŁ Reclamation
                  Boise, Idaho
U.S. Department of Health,  Education and Weifar*
              Public Health  Service
    Water Supply and Pollution Control Program
                Pacific  Northwest
          Region IX, Portland, Oregon
                  December 1961

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                      YAKIHA PROJECT. WASHIHGTCH
                     KEKKEHICK DIVISION EXTENSION
Preface
This report presents preliminary impressions relating to municipal
end industrial water supply and stream quality control aspects
associated with the proposed Kennewick Extension* Yakima Project,
Baching ton.

the project has been viewed froa tha standpoint of provisions set
forth in Public Law 85-500, Title III, Water Supply Act and Public
taw 84*660, Federal Kater Pollution Control Act, amended 1961
(PL 87-88).

Vnter Supply
The major municipal and industrial water users in the vicinity of the
proposed Kennewick Extension are located in the Eichland and Kennewick,
Washington areas.  These areas, at the present time, are served by
waters taken both from underground sources and surface flows of the
Yakitaa and Columbia Rivers.

Project _Features
The Kennewick Division Extension (6,300 acres) is located in the
extreme lower portion oŁ the Yakima Valley about seven miles vest of
Richland and about fifteen miles northweDt of Kennewick.

The lands within the Extension would be served by waters diverted from
the Yakima River at the Proooar Diversion Dam and transported to the

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Chandler Canal and thence across the Yaklma River to the existing



Kennewick Main Canal.  From near Klona, a diversion of 125 cubic feet



par second would be made to the irrigable lands of tha Extension*





Yakima River water diverted at the Prosser Dam would consist of natural



run-off, reservoir storage releases and return flow from upstream land



irrigation.  During the months of July to October, and especially during



the latter part of this period, diverted water would consist almost



entirely of irrigation return flow*



Adaptability of.Project for Water Supply and Quality Control^



Owing to the fact that the cities of Richland and Kennewick are located



along the lower Yakima River and the Columbia River where relatively



abundant supplies of water are available, no shortage of water to



meet future increases in municipal and industrial demand in these



areas would be expected.  It is believed further that no significant



future demand for municipal and/or industrial supply would develop



within the Kennewick Division Extension.





It should be pointed out also that tho lover Yakima River, during the



latter part of the irrigation season, becomes enriched with nutrient



and mineral materials leached from upstream agricultural lands.  The



presence of these materials in combination with certain climatic and



temperature conditions could be expected at times to stimulate ex&esslve



growths of algae and other taste and odor producing organisms in the

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main river channel in the Prosser Fool and along the diver*ion canal*



of the project.  Rev water in this condition ie difficult and expensive



to treat for domestic use and often cannot be returned to satisfactory



potability.  In addition, little is known concerning human consumption



@f residual insecticides, pesticides and weedlcides that can remain



in treated waters originating from agricultural land uses.





Conclusiona



In view of the relative convenience of the existing sources and the



abundance of vater of suitable quality available in the Rlchland and



Keanewick area and the belief that municipal and industrial water demands



could not be expected to develop within the proposed project area,



provision for M&l water supply in the Kenncwick Division Extension



does not appear justifiable at this time.





Since the Kenncwick Division Extension would involve reuse of waters



already considered somewhat degraded in quality and the quality of



return flows resulting from this reuse could be further reduced, no



benefit assignable to the Extension for quality control appears possible.

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