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AUGi•IEtITATIOPI PLAiJ OUTLIFIE <br />,. <br />~.: <br />• The t1t. Gunnison Kline hJo. 1 operations could potentially impact all <br />currently deereed water rights on I~innesota Creek where the diverted <br />water originated above the mined area. Injury, if any, will not occur <br />to all of the riahts•at the same time. It is unlikely that any <br />measurable injury will occur to more than one or two rights at any <br />given time. <br />For purpose of identifying which ditches, and their appur*_enant water <br />rights, may be impacted, at various times and conditions,~we have <br />placed each ditch and reservoir right in one of five categories. <br />Table 3 presents the definition of each of the five categories as well <br />as providing a listing of ditches in each category. <br />Injury will occur only to a calling ditch. (If the ditch is not <br />calling it is either, (a) satisfied or (b) there is a senior call.) <br />The extent of injury will be defined by the difference bet~,veen the <br />• expected (pre-mining) flow and the actual streamflow at the head gate. <br />To identify which ditch may be injured and determine quick and <br />appropriate mitigation of that injury, under a variety of conditions, <br />we have prepared the attached flow chart (see Appendix A). This chart <br />represents a method for identifying and mitigating injury using a <br />strict accounting procedure. The procedure assumes: (a) there will <br />be accurate measurements of streamflows, ditch diversions and reser- <br />voir storage; and (b) an acceptable correlation will be developed bet- <br />ween stream gages on affected basins and index stream gages. <br />The final court approved augmentation plan is expected to be less <br />complicated than the flow chart indicates. lJe believe that an accep- <br />table, straight-fo Huard formula can be created based upon correlations <br />yet to be developed. Under extreme administration conditions ARCO <br />should be prepared to implement a plan similar to that outline in <br />Appendix A. <br /> <br />(23) <br />