168 



What SOS Alternatives Are Considered in the Technical Appendices? 



Six operating strategies for the coordinated Columbia River System were analyzed for 

 the EIS. Briefly, they are: 



SOS 1-Pre-ESA Operation reflecting conditions before changes in response to the 

 listing of three Snake River salmon stocks as threatened or endangered under the 

 Endangered Spedes Act 



SOS 2-Current Operations incorporating interim flow improvement measures in 

 response to ESA listings of Snake River salmon. This represents the no-action 

 alternative. 



SOS 3-Flow Augmentation designed to provide more water to move juvenile fish 

 more rapidly dovtm the river by setting flow targets for each month. 



SOS 4-Stable Storage Project Operation to benefit recreation, resident fish, wildlife, 

 and anadromous fish, while minimizing the impacts to power and flood control. The 

 goal is to nunimize storage reservoir fluctuations while moving closer to natural flow 

 conditions. 



SOS 5-Natural River Operation to increase river velocity by drawing down the four 

 lower Snake projects to near original riverbed levels for either 2 months or 4 1/2 

 months during juvenile fish migration. 



SOS 6-Fixed Drawdown to draw down the four lower Snake River projects, or 

 Lower Grarute only, to fixed elevations below minimum operating pool for either 2 

 months or 4 1/2 months. 



SOS 7-Federal Resource Agencies Operations establish various flow targets and 

 draft upstream storage projects as necessary to meet the targets which provide 

 improved in-river migration of anadromous fish. 



What is this Technical Appendix and the EIS? 



This technical appendix is one of 19 [number and titles subject to revision) prepared for 

 the SCR. They are: 



Anadromous Fish Economics and Sociology 



Cultural Resources SoUs, Geology and Groundwater 



Flood Control River Operation Simulation 



Power Air Quality 



Irrigation/Municipal and Industrial Land Use 



Water Supply Screening Analysis 



Final Draft - September 15, 1993 



