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<br />O'Ol\);)j <br /> <br />Supplemental Environmental Impact Report <br />AS Lateral Hydropower Project <br /> <br />CONTENTS <br /> <br />Summary <br /> <br />Purpose ........ ,......, ......... ... ....... ... ............ ...,... ..... ............. .............. ..........,......... ES-l <br />Purpose and Need for the Facility .....................................................................ES-l <br />Description of the Proposed Action .................................................................. ES-2 <br />Actions by other Governmental Agencies......................................................... ES-2 <br /> <br />Alternatives Considered ... ....... ...... ...... ... ... .... ... ..... .............. .... .......................... ES-3 <br />Major Environmental Impacts. ............ ......... ............... ............. ......................... ES-4 <br />Areas of Controversy............................... .......... ..... ......................... .................. ES-5 <br /> <br />Unresolved Issues ..................... ...... ........ ............. ........ ...... ........... .................... ES-5 <br /> <br />Contents <br /> <br />Contents..... ..... ,.. ........ ..... ... .... ...,... ... ,.. ... ..... ..... ... ....... ... ........................ ................... ii <br />Tables ..... .,. ... ..... .... ....... ... ... .... ....... ... ............. ..... ... ........ ...,...... ............................. viii <br /> <br />Figures.............................,..........,........................................................................... ix <br /> <br />1.0 Purpose and Need <br /> <br />I, I Introduction ....... ................. ... ................. .......... ........ ............. .................... ...... .....1-1 <br />1.2 Authorization .......................................................................................................1-2 <br />1.3 Purpose ................... ........... ......................... ....... ........................ ...........................1-2 <br />1.4 Need for Project ...................................................................................................1-3 <br />1.4.1 Electrical Power .......................................................................................1-5 <br />1.4.2 Renewable Resources...............................................................................1-6 <br />1.4.3 hTigation System Operation .....................................................................1-7 <br />1.4.4 Project Revenues ......................................................................................1-7 <br />1.5 Relationship with Other Projects.......................................................................... 1-8 <br /> <br />2.0 Alternatives, Including the Proposed Action <br />2.1 Description of Alternatives ..................................................................................2-1 <br />2.1.1 Alternative A (No Action)........................................................................2-1 <br />2.1.2 Feasible Development Alternatives.......................................................... 2-3 <br />2.1.2.1 Canal Modifications ...............................................................2-3 <br /> <br />2,1.2.2 Penstock .......... ... .....................,. ,............................................ 2-7 <br /> <br />2.1.2.3 Powerhouse ............................................................................2-7 <br /> <br />. <br /> <br />AS Lateral Hydropower Project <br /> <br />July 2000 <br /> <br />"YO ", ~._,_ ,_ ,~-. ,_-_~~ _ <br /> <br />'.',,-.'.,,-, <br />