Laserfiche WebLink
<br />~o;.;VoJ <br /> <br />I <br /> <br />been a tremendous amount of deposition of <br />sediment in John ~furtin Reservoir and it <br />has already cut down the effective capacity <br />of the reservoir substantially. I think <br />Gene Whitten could give me the accurate <br />figures. I don't have them with me. <br /> <br />One of the reasons that there is a very <br />recent capacity table on John Martin is <br />that, because of the tremendous siltation in <br />the dam, the old gauge at the face of the <br />dam became useless as a guide to estimating <br />the capacity of the dam at anyone time. So <br />a complete new capacity table had to be de- <br />termined. <br /> <br />I <br /> <br />The ultimate point that I am raising <br />here is, that with this sedimentation and <br />the flattening out of the reservoir bottom <br />and with the bottom line on your chart con- <br />stantly rising so that the net effective . <br />capacity of this reservoir is being cut down, <br />it. seems to me obvious that ten years from <br />now, 10,000 acre-feet of water is not going <br />to be sufficient for fish even if it should <br />be today. We are looking here at a long-term <br />proposition and the answers that my people <br />want in the way of operating principles are <br />these - they are long term operating princi- <br />ples. We want to know what is going to happen <br />to this pool 15 years from now when sedimenta- <br />tion has considerably flattened the present <br />contour of the reservoir and 10,000 acre-feet <br />are no longer sufficient. We want to know <br />what the studies show as to whether or not <br />the addition of that minimum 10,000 during <br />very dry periods will accelerate, to any great <br />extent I the rate of deposition of sedimenta- <br />tion in the reservoir and whether it might <br />not be true that if the reservoir contour is <br />much flatter in the future, that that effect <br />of stilling and increased deposition of sedi- <br />ment might not be even accelerated in the. <br />future. In other words, 15 years from now, <br />are we going to. have a reservoir here that <br />has been cut down 30% from its present capa- <br />city and it's rate of sedimentation has <br />increased fantastically because of the exist- <br />ence of this pool in dry times.? <br /> <br />I realize that, for one thing, a great <br />