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<br />..'::" <br /> <br />3. Where - The feas~b~l~ty of incorporating passage facilities <br />should be studied on any new project involv~ng blockage of the <br />channel and required whenever necessary. Add~tional research in <br />the next few years should provide more ~nformation on effective <br />designs and locations. <br /> <br />Eva 1 uat i on needs to cons i der 'the temperature of di verted water <br />as water may be too cold for passage by endangered f~shes. <br /> <br />4. ~ - Project' sponsor <br /> <br />5. <br /> <br />When - Passage facilities should be addressed early in <br />planning and integrated throughout the design process. <br />projects now being developed, the best approach may be <br />establish that passage facilities will be required but <br />their design until additional research results are in. <br /> <br />proj ect <br />For <br />to <br />delay <br /> <br />B. Release Temperatures <br /> <br />1. Effectiveness - As discussed in Part II, it has not been clearly <br />demonstrated how temperature and flow independently affect <br />endangered fish. Ongoing research at Flaming Gorge may produce <br />more definitive information. <br /> <br />Optimum temperature is known to be important in physiologically <br />preparing the fish for spawning. Warmer temperatures also <br />enhance growth. <br /> <br />'New projects should examine the effects uf their operation on <br />temperature, particularly during the growth period from May to <br />October and during spawning in July and August. <br /> <br />2. Water impacts - If power generation is included as part of a <br />project, temperature regulation may increase turbine wear and <br />reduce generation capacity as discussed in Part II. <br />Reregulation, while costly, may be used to reduce impacts on <br />power generation. <br /> <br />3. Where - Temperature changes could be manipulated at the dam by <br />using variable outlet intakes or at a reregulation structure <br />located downstream. <br /> <br />The effects of vegetative management on certain river stretches <br />may also be evaluated for use in managing temperatures. <br /> <br />4. Who - The project sponsor <br /> <br />5. When - Temperature releases should be accommodated as they are <br />determined to affect the fish, based on on-going research. <br />Generally, temperatures should be accommodated during periods of <br />growth, migration, spawning, and larvae transport during the <br />months of May to October. ' <br /> <br />- 15 - <br />