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WSP03614
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Last modified
1/26/2010 12:51:16 PM
Creation date
10/11/2006 11:52:28 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8270.100
Description
Colorado River Basin Water Quality/Salinity -- Misc Water Quality
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1981
Author
USDOI
Title
Quality of Water - Colorado River Basin - Progress Report No. 10 - January 1981 -- Part 1 of 2 -- Title Page through Part IX - page 98
Water Supply Pro - Doc Type
Report/Study
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<br />. <br /> <br />e <br /> <br />., <br /> <br />l-& <br />o <br />C,;l <br />o <br /> <br />HISTORY OF ~ATER RESOURCE DEVELOPMENT (continued) <br /> <br />One prOVISIon in the compact permits exportation of the water out of <br />the basin as long as it is used beneficially in the seven Basin States, and <br />another provision recognizes the obi igat ions of the United States to the <br />Indian Tribes. The compact prescribes the manner in which the water of the <br />Colorado River system may be made available to Mexico under any water <br />rights recognized by the United States. <br /> <br />The compact, in effect, cleared the way for legislat ion authorizing <br />the construct ion of major projects such as Boulder Canyon Project, and it <br />also cleared the way for compacts or agreements within the Upper alld Lower <br />Basins to further divide the water among the States. <br /> <br />2. Mexican Treaty of 1944 <br /> <br />The treaty with Mexico, signed in 1944, provided for the annual <br />guaranteed del ivery by the. Un ited States of 1. 5 mil I ion ane-feet ([ 900 x <br />106m3) of Colorado River water to Mexico. Th is treaty does not ment ion <br />water quality, and water from different sources has been used to supply <br />the 1.5 million acre-feet (1900 x 106m3) right. Because of this and <br />other reasons, a problem of quality arose which had become of much concern <br />to both countries. The qual ity aspects of the relat ionsh ip with Mexico <br />are covered later under "Legal Aspects, Water Quality." <br /> <br />3. <br /> <br />Upper Colorado River Basin Compact <br /> <br />With the water allocated to the Upper Bas in by the Colorado River <br />Compact and 101 ith the 1944 Mex ican Treaty signed. the Upper Bas in St ates <br />began negotiations which resulted in the signing of the Upper Colorado <br />River Basin Compact in 1948. Under the terms of the compact, Arizona is <br />permitted to use 50,000 acre-feet (60 x 106m3) of water annually from <br />the Upper Colorado River system, and the remaInIng water is apportioned to <br />the other Upper Basin States in the following percentages. <br /> <br />State of Colorado 51.75 pe rcent <br />St at e of New Nexico 1l.25 percent <br />St at e of Utah 23.00 percent <br />State of Wyoming 14.00 percent <br /> <br />Congress had previously been unwilling to approve projects without <br />assurance that a water supply would be available, so this division of wate~ <br />among the States permitted development to proceed and resulted primarily in <br />the authorization of most of the Federal projects above Lee Fe~ry that a~e <br />mentioned in this report. <br /> <br />Neither of the compacts specifically ment ions water qoal ity, but it <br />has been ~ecognized as a factor to be C011side~ed in developing projects, <br />and water quality studies have been required by recent legislation author- <br />izing the construction of projects in the Upper Basin. <br /> <br />14 <br />
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