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~ ~ C'T';) CHAPTER VIn J.LI'EftNilTlVE PLilNS Enlargement of Existing Ditches from Elk Creek This ,plan involves enlargement of existing ditches diverting from Elk Creek near New Castle. and pumping the water to Harvey Mesa lands. Water available in Elk Creek would be insufficient for project lands, and an ~xpensive canal diverting from the Colorado River near Gl~nwood Springs would be required to supplement the supply. This plan would bEl excessively costly for the benefits received. Pumping froffi the Col~rado River Pumping with hydro pumps powered by water from t,he Colorado River was found impracticable because of the high lift and the long, costly divElrsion canal that would be required. Canal from Main Elk Creek to Harve.v Gap Reservoir Under this plan the flow of Main Elk Creek would be tapped at a much lower elevation than in the Elk Falls Canal and Power Conduit plan. Water from the creek would be delivered to the Harvey Gap Reservoir which would be enlarged to a capacity of 6,000 acre-feet, Under the plan the Grass Valley Canal would be abandoned Ilnd additional East Rifle Creek water would not be used. The plan would not fully provide for the project area and its cost per acre served would be materially greater than that for the adop te d plan. Enlargement of Harvey Gap Reservoir Harvey Gap Reservoir would be enlarged, and an increase would be rmde in the quantity of East Rifle Creek water it would store during winter and early spring. The cost involved, however, is excessive for the water developed and the development would supply water only to those lands on Harvey Mesa. Storage on East Rifle Creek Under this plan water would be stored abov," the Grass Valley Canal intake. Reservoir water could be diverted to all project lands elimi- na ting the ne cessity of storing water for replacElment. The en tire watershed of East Rifle Creek was examined, however, and no feasible reservoir sites were found. f 54