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<br />,-- <br /> <br />* Temperature control to benefit downstream populations of <br />native fish <br /> <br />* Timing - release of warm water should coincide with <br />native fish spawning requirements. <br /> <br />* Striped bass - cold water may act as a barrier that <br />protects native fish populations from non-native <br />predators such as striped bass in Lake Mead. <br /> <br />* Humpback chub - young entering cold water of Colorado <br />River from warmer water of the Little Colorado River <br />(LCR) may experience thermal shock. <br /> <br />* Trout - water temperature below Glen Canyon Dam is below <br />range for optimum growth of rainbow trout. <br /> <br />* Aquatic food chain - the affects of changing water <br />temperature on aquatic food chains is unknown. <br /> <br />5. Artificial protection of camping beaches <br /> <br />* revetments <br /> <br />* jetties <br />6. Take Down the Dam Alternative <br /> <br />* Would force discussion of pre-dam conditions <br /> <br />* Preserve native American sacred sites <br /> <br />* Document natural erosion processes and conditions <br /> <br />WATER FLOWS THROUGH GLEN CANYON OAK <br /> <br />Steady Flows <br /> <br />1. Steady releases within a high-water year (16 maf) or low- <br />water year (8 maf). <br /> <br />2. Steady flows year-round with 22,000 cfs during high-water <br />years and 12,000 cfs during low-water years. <br /> <br />seasonally Adjusted Steady Flows <br /> <br />3. Water releases should be set to reduce flood flows to a <br />probability of one in twenty years, or to one in 100 years. <br /> <br />4. This concept would address both a "normal" water-release <br />year, i.e., (a) releases of 8.23 million acre-feet (maf) <br /> <br />10 <br />