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<br />TABLE OF CONTENTS
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<br />EXECUTIVE SUMMARY ..,.".,...,.............."...."."......... ......,.....,...............,........""...,..,....",........,......ES-l
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<br />1.0 PURPOSE AND NEED FOR THE PROPOSED ACTION "..............,........,...............,............1-1
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<br />1.1 . Introduction......... ..,..,..,... ..,.",.... .,.............,... ..".."" .,.............. .,.,."... .,.............. .....,...,. .,.... 1-1
<br />1.2 Colorado River Water Supply Management and Allocation ....,............""...,......,......1-2
<br />1.2.1 Colorado River System and Water Supply...."..,."'........,...........,..".,.,............. 1-2
<br />1.2,2 The Law of the River ........,.,.."....,..,..,.........,...........",........,...................,......,......1-4
<br />1.23 Operation of the Colorado River ...,......."....,....,..............,..",.........",...,..,.......... 1-9
<br />1.2.4 System Reservoirs and Diversion Facilities ".."..........,...................................1-12
<br />1.3 Background Relevant to the Proposed Project ,........,......,.............,..",.......................,1-14
<br />1.3,1 Background Relevant to the Implementation Agreement...,..........."........... 1-14
<br />1.3.2 Background Relevant to the Inadvertent Overrun and
<br />Payback Policy..,...... .,..., ..,. ............ ....."...., ,. ,..,..,....,................ .,....,... ........,......... 1-15
<br />1.3.3 Background Relevant to the Biological Conservation
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<br />Measures ." .",.. .."....". .... ,. .,.,.."..,..,... ,.. ...... .,.. ...,."..,.".,...,..". ..,.. .....,."... .,..,..... .., 1-16
<br />1.4 Purpose and Need .....,.......,..........,....".....,...,..,....,.........".............."...,......................",..1-16
<br />15 Relationship to Other Planned Projects, Programs, and Actions..".........................,1-17
<br />15.1 Related Projects to and Components of the lA...,..."......"'...............,.."..,..,... 1-17
<br />15,2 Geographically Related Projects,...,.....,.,........."..".,........."..,..........."."........... 1-2 0
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<br />1.6 Related Documents"...."..,.....,.., ...... .."..,.. ".".....,...,..,........,.,.,.,....... ..,., .,.,.....,... .,.,...,...., 1-24
<br />1.7 Public Involvement and Seoping Process.,....,.."."......"....,..,.."...,...........,................... 1-25
<br />1.8 ElS Organization and Approach...,......,......,.,...m......,.."........,........,....,..................."..,1-27
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<br />2.0 DESCRIPTION OF THE PROPOSED ACTION AND ALTERNATNES ...,.,..,........,..........2-1
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<br />2.1 Introd uction ",..,..,. ,..,.. ......,.".,...".,..,.",..,.....".,...., ,.,..,..... ...",.,...,...,....., .,....,.".,."......".,... 2-1
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<br />2,2 Proposed Action"",,'."..,.....,.. ,..,., ,..,..,...,.., ,.....,..""".... ,.....,.,.,..",..",...,...,........".,...,....,.., 2-1
<br />2.2,1 Execution of the Implementation Agreement...,...,.,..,..""..,...,..."....,..,............ 2-1
<br />2.2.2 Adoption of an Inadvertent Overrun and Payback Policy,............,............. 2-22
<br />2.2.3 Implementation of Biological Conservation Measures ..,...........".....,......"... 2-23
<br />23 No- Action Alternative.,.,......,...",.,."......,. ,..".,.."."".,.,... ....."........,..,... ...,.......,. ."...,..,.,.2-26
<br />23,1 No Action for Implementation AgreemenL.",....".,.,...,..,..,...,.......,."..........., 2-26
<br />2.3.2 No Action for Inadvertent Overrun Policy.......,......."........"......................,.., 2-29
<br />23.3 No Action for Biological Conservation Measures.........,..,....,...,..,.."..,...,...... 2-29
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<br />2.4 Altema tives.,.",.,.,..........,...,.........,.,.".,..,.."..,..,.........,.,...,...,...."",...,...",.,....,..,.,... ,.,.".,.. 2-29
<br />2.4,1 Implementation Agreement Alternatives ..".....,..,..,...,..,......,...:.......,.,........,.. 2-29
<br />2.4.2 Inadvertent Overrun Policy Alternatives..,..............,...........,.....,......,.......,..,.. 2-30
<br />2.4.3 Altemative Biological Conservation Measures ....,.,......"....,.....,.",..,.,......,.... 2-30
<br />25 Summary Comparison of Altematives..,........,.........,."....,.........,........,...................,.... 2-30
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<br />3.0 AFFECTED ENVIRONMENT, ENVIRONMENTAL IMPACTS, AND
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<br />MlTIGA TION MEASURES. ..,. ..,.,...." .,...,.......... .., ...,.."". ."..,...,.....,......"."..,.,....".,.........".".. 3.0-1
<br />3.1 Hydrology/Water Quality /Water Supply,......,......,..............,..............,..........,......... 3.1-1
<br />3.1.1 Affected Environrnent..,....,........,...,........"....,......,....,......,...",..........................3.1-1
<br />3.1.2 Environmental Consequences,..".",.....................,..."...........,.."...........,.,."... 3.1-17
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<br />lA, lOP, and Related Federal Actions EIS
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<br />DEIS - January 2002
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