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<br />C. Release T~m~ng <br /> <br />1. Effect~veness - Flows need to be t~med to adequately prepare and <br />ma~nta~n ~mportant hab~tat for endangered fishes. Important <br />benchmarks for managing flow include periods immediately before, <br />during, and after spawning, from June to October. During these <br />months flows prepare the fish physiologically, assure adequate <br />spawning habitat and provide for larvae drift to nursery <br />habitats. The remainder of the year, flows should be adequate <br />to maintain the fish until the more favorable conditions of <br />spring and summer. <br /> <br />The effects of flow and temperature rema~n ,interrelated and <br />should both be considered when designing for endangered fishes. <br /> <br />2. Water impacts - Existing water rights may not be in accord with <br />flow requirements of the endangered fish. If the system does <br />not ha ve the fl exi bil ity needed to readj ust the timi ng of water <br />de li veri es, water ri ghts may need to be purchased or obta i ned by <br />filings in accordance with the existing water rights system. <br />Changes of flow for fish needs may reduce the power delivery <br />capability and revenue distribution of a project. <br /> <br />3. Where - Flows should be managed within the downstream zone of <br />influence of a project. Operat~ons will be most important if <br />this zone includes habitats as identified ~n the "Sensitive <br />Habitat Document for Threatened and Endangered Species." <br /> <br />Projects could include reregulation structures and variable <br />intakes to moderate flows and temperatures if the cost was <br />warranted. <br /> <br />4. Who - Project sponsors, <br /> <br />5. When - New projects should accommodate the temperature and flow <br />needs of endangered fish. This should be incorporated into <br />project design, operation, and ma~ntenance. <br /> <br />D. Maximum Depletions <br /> <br />1. Effectiveness - Maximum depletions are a corrollary to minimum <br />flows and are discussed in Part II. <br /> <br />2. Water impacts - A limit on depletion would affect the quantity <br />of water available for development and would reduce the <br />flexibility of the project in making deliver~es. This concept <br />may conflict with state pOlicies,of full beneficial use pursuant <br />to the appropriation doctr~ne. Water required to rema~n as flow <br />in the river should be purchased or appropr~ated by filing for <br />the water rights. <br /> <br />- 16 - <br />