Laserfiche WebLink
1 <br />Paula Phillips <br />January 26, 1987 <br />Page 2 <br />ated from 1936-1947 (see Table 1). This gage, located downstream from <br />where Dry Creek enters Minnesota Creek, was reestablished by WECC in 1985 <br />' and is currently being operated as the basis for future flow comparisons <br />and stream depletion calculations. <br />in calculating the "Contribution Factors" no adjustments were made for <br />diversions or reservoir operations above the Minnesota Creek gage. <br />Beaver Reservoir, an existing upstream control, was not constructed until <br />the 1950's and did not alter the natural flow during the period of records. <br />The upstream direct flow water rights are small, relatively junior rights <br />which historically irrigated only about 75 acres during early irrigation <br />season. Return flows entered the stream above the gage. We estimate that <br />the historic annual consumptive use was less than 100 acre feet which is <br />1 only about one-half of one percent of the annual stream flow at the gage <br />and therefore was insignificant and unmeasurable. <br />~~ Dry Fork and Lick Creek average monthly flows were determined from flow <br />7 records obtained by wECC from 1977 thru 1984 (see Table 2). The records <br />11 are incomplete or non-existent during winter months. Records are good <br />during irrigation season with average monthly flows based on at least five <br />1 years of record for the months of June thru October. These are the months <br />when a "call" is most likely to occur. <br />Dry Fork flows were adjusted for Monument Reservoir operations and Deep <br />Creek Ditch diversions. Monument Reservoir records are incomplete and not <br />considered reliable, therefore, some adjustments were made to estimate, in <br />our opinion, a more realistic streamflow estimate. The storage and release <br />data used to develop average Dry Fork flows is shown in Table 3. <br />Because the records for Dry Fork and Lick Creek are incomplete in winter <br />months and may not represent the true streamflow pattern, some adjustments <br />were made to make the data fit a typical hydrograph. The adjustments are <br />• shown in Table 4. <br />The monthly contribution factors were calculated by dividing the average <br />monthly flows in the tributary stream (adjusted) by the corresponding aver- <br />age monthly flows in Minnesota Creek, and are shown in Table 5. <br />.~. <br />-- - - ~..~._:.,s42..a; r ~ . • ;.a ~'~u-ti'firu?aij` r.- - , <br />