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co ,:\J C') ,-.I 5<, . The proposed reservoirs in the Beaver Creek basin would produce ,yields of about 1100 acre-feet or' less. Even with these reser- voirs providing complete regulation of the entire supply, ther,e wou14 be additional water needs on Taughenbaugh Mesa, suggesting ,that there would be appropriate reason to import water.. This was not ,pursued because the high cost of a canal .and tunnel' system from Hunter Mesa 'makes,such a project configuratiun uncompetitive_with alternative,pro-' ject arrangements and a: limit.ed water sUPPLY.' 6. The simulated operation of a reservoir on Yank Creek required that a demand be assumed since no clear irrigation service area exists. 'A Yank Cree.k Reservoir ,with 4000, acre-feet of capacity would produce. a yield of about 2100 ,,,ere-feet. for an. assumed irriga- tion demand of 1500 acres. A 10,000 .acJ;e-foot" reservoir ,with a 5000. acre irrigation demand would produce a yield of about, 5500 acre-feet.", Yank Creek Reservoir could also be used for other water s~pply 'pur- poses such as municipal/domestic/industrial and ski-area, snowmaking augmentation plans. 7. The East Divide Creek Dam and Reservoir would service an area of 1950 acres on lower East Divide Creek, The yield would . be highly sensitive to the size of the reserv9ir. Reservoirs with sizes of 2000, 4000, and. 6000 acre-feet produce yields, of 2000, 2804, 'and 3108 acre-feet, respective ly, Reservoi rs ,larger than 6000 acre-feet do not produce significantly larger yields. 8. The Owens Creek Dam and Reservoir as evaluated in Scenarios C & D consists of a project configuration which does not export water from the Owens Creek basin. Assumed irrigation demands of 1000 acres and 1500 acres could. realize yields of. 1844 and 2363 acre-feet, respectively, from a 4000 acre-foot reservoir on, Owens Creek, upstream of its confluence with Buzzard Creek., 9. The Buzzard Creek Reservoir and, water conveyance. .system would include provision for the importation of ,new. water i1;lto the West Divide' Creek basin. The Buzzard Creek site _has an average annual flow of about 18,780 acre-feet, however, not all of this water can, be diverted. Minimum instream flows and channel maintenance flows require a minimum release to. Buzzard Creek totaling about 6200 acre- feet annually. Potential losses include reservoir. evaporation, canal losses (estimated at 25%), losses due to insufficient canal or reser- voir capacity, and losses. when there is- no demand., The water deli- vered to the West Divide Creek basin would be a function of the diverSion/pump capacity and, reservoir storage capacHy. Some deli- veries are presented within the following table: I-I J