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003167 A feasible hydroelectric power supply could be developed by the operation of Jack Creek Reservoir. Preliminary sizing analyses indicate that the releases could produce 3,040,000 kilowatt-hours per year by utilizing a 700-KW genprating unit. Further analysis of the hydroelectric power potential should be conducted prior to final design. No previous geotechnical investigations were conducted near this site, and consequently no drill hole information is available. The information presently available from field observations made during reconnaissance visits has given no indication of lack of suitability for a dam of the size and type proposed. The location would appear to be an excellent site for the proposed Jack Creek Dam and saddle dike. Approximately 6 miles of U. S. Forest Service access road will need to be relocated around the reservoir in order to provide access to the Jack Creek Guard Station. Also, the Jack Creek Campground will need to be relocated and possibly enlarged, The construction of a reservoir will probably result in an increase in visitors to the area for both day and overnight use. The Jack Creek Reservoir site is comprised predominantly of wil- low and grassland habitats and is bordered by lodgepole pines and some aspen stands. Brown trout and brook trout which inhabit Jack Creek in the reservoir area would be affected by construction of Jack Creek Reservoir. Terrestrial species des~ribed as occurring along the Battle C~eek to Jack Creek Pipeline occur in the Jack Creek Reservoir area as well. The area is important summer feeding habitat for mule deer and it is probably used in the spring and fall by elk. Endangered fish and wildlife species are not known to occur in the res- ervoir area. The proposed Jack Creek Reservoir, constructed to a capacity of 38,410 AF, is estimated to yield approximately 30,000 AF/year from the Little Snake River drainage to the North Platte River system. The proposed reservoir VI-7