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<br />flow (1977), reproductive success was very poor (Holden, 1977). In more <br />normal and high flow years, reproductive success is good (Holden and <br />Crist, 1978; Holden and Selby, 1979). Therefore, if flows are reduced <br />in the White or Yampa Rivers beyond a point that is as yet undetermined, <br />the best remaining naturally reproducing population of Colorado <br />aquawfish could be seriously impacted. It should be stressed again that <br />this impact could be caused by the cumulative effect of a number of <br />small withdrawals from the White River, and other large tributaries, of <br />which the subject withdrawal is only one. <br />Therefore, it is concluded that the present mining plan will not impact <br />Colorado squawfish or other aquatic life in the White or Green Rivers by <br />itself, but may contribute to a cumulative or incremental impact that <br />could eeriously influence these aquatic ecosystems. <br />w a • w ~ <br /> <br />II.G-33 <br />