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<br />001543 <br /> <br />, nutrients in Lake Mead. The reduction in nutrients is seemingly <br />a result of the increasing Colorado River depletions and the <br />fluctuating lake levels are caused by operational criteria. <br />Neither of these conditions is expected to worsen under the <br />proposed action. Therefore, the proposed action will have little <br />noticeable effect upon the bass fishery in Lake Mead, <br /> <br />Fishery Species. - There are a number of fish species below Glen <br />Canyon Dam, but only the rainbow trout should be impacted as <br />previously mentioned. There is an endangered fish species within <br />the Grand Canyon, the humpback chub. which should not be affected <br />by this program unless the reduced food base, due to dessication <br />of organisms, increases the predator pressure on this fish's <br />young. This is highly speculative and would need considerable <br />study to determine if it were true or false. <br /> <br />Bank Erosion. - There is some evidence that the beaches within <br />the Grand Canyon are slowly being removed. This will continue to <br />occur with or without energy development. Accelerated erosion <br />would not be expected. None of the Lower Colorado River beaches <br />should be affected. <br /> <br />Sediment Deposit. - There will be no effect upon sediment depo- <br />sit. As mentioned earlier, there will be no reduction in low <br />flows below Hoover Dam, and no impacts on sediment deposit <br />between Glen Canyon and Lake Mead are foreseen, <br /> <br />26 <br />