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'• ' .) Paula Phillips January 26, 1987 Page 5 o If the calling right received historic return flow (see Return Flow Diagram - Drawing No. 1) then only consumptive use credit can be used for augmentation. o If the calling right did not receive historic return flow, then the full diversion credit can be claimed. There are a limited number of realistic call scenarios on Minnesota Creek. Lone Cabin and other diversions on tributaries above Dry Fork and Lick Creek do not, and cannot, place a call on the stream system. The most important calls on Minnesota Creek originate from the Minnesota Canal, usually from priority 20 for 32.5 cfs. Other Minnesota Canal priorities (A119, G67 and J28) can also place a call. The second most important calling structure is the Turner Ditch with its A98 and B11 priorities. There is also the possiblity that the Lane or Stewart Ditch could put a call on the Creek. Tables 7, 8, 9, 10 and 11 present the augmentation credit available in the Augmentation Plan to meet the call from the potential calling rights. Administration Procedure Near the beginning of each irrigation season, between June 1 and June 15, WECC will determine the amount of retreat mined area under Dry Fork and Lick Creeks. If there is no retreat mining and there is none comtemplated for that season then the plan will not be in effect. in addition they will determine whether that particular year is classified as "wet", "average", _ or "dry" as defined in the Plan of Augmentation based on the April and May flows at the Minnesota Creek gage. This information will be provided to the Division Engineer and also entered into the depletion calculation equations described in the Plan of Augmentation. When and if it is determined by the Division Engineer that a legitimate call, as defined in the plan is in efffect on Minnesota Creek, the follow- -~ ing procedure can be implemented to administer the WECC augmentation plan: . 1~ ,<...'. r