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.. " (..~O! ,.~ ~ 28 FRYINGP AN -ARKANSAS PROJECT 44, The western-slope features would enable the average annual · diversion of an estimated 69,200 acre-feet of project water, As a Tesult of eastern-slope storage to be provided by the project, about 14,900 acre-feet of water could also be diverted annually by the Twin Lakes Co., which cannot now be diverted for lack of storage capacity. This would be in addition to its present average diversion of 38,000 acre-feet, EASTERN SLOPE SUPPLY AND POWER FEATURES 45, In round figures, the major potential eastern slope project facilities include 3 earth-fill dams, 60 miles of power canal ranging in capacity from 300 to 1,000 second-feet, 3 diversion dams, over 10 miles of diversion canals, 7 hydroelectric powerplants and switch- yards, 3 small forebays and 2 afterbays, 9 substations, about 400 miles of transmission line, and a municipal water supply system. The latter system includes: 1 diversion dam, 15 miles of reservoir supply canal for irrigation replacement water, 3 pumping plants, 1 small regulating reservoir, 1 treatment plant, and about 175 miles of pipelines, Other structures and equipment would be required for construction and operation such as one permanent camp, caretakers' residences and shops, warehouses, construction camps, offices and laboratories, and a communications system. 46, Imported and native water would be stored first in an enlarged Sugar Loaf ReservoiT on the Lake Fork of the Arkansas River. Re- leases would flow about 20 miles south in the Elbert section of the Arkansas power canal, then through the Elbert hydroelectric power- plant and into the enlarged Twin Lakes Reservoir, The lO-mile Snowden Canal would divert additional Arkansas River water into the Twin Lakes Reservoir. From there, the water-increased by tributary interceptions and by the Wapaco diversion from the river- would flow south some 40 miles in the Arkansas power canal and be returned to the main stream near Salida. Power would be generated en route in the Granite, Wapaco, Princeton, Johnson, and, Salida , ~.. hydroelectric powerplants, Forebays would be provided above the Princeton, Johnson, and Salida plants, The existing Clear Creek Reservoir (capacity about 11,400 acre-feet) would be adapted for use as an afterbay for the Granite powerplant. An afterbay would be provided on the, Arkansas River for the Salida plant, . Near Salida and Canon City some water might be diverted for irrigation. The remainder would continue down the river to the potential Pueblo Reservoir, Most of the supplemental irrigation releases from that reservoir would be made through the Pueblo hydroelectric powerplant, 47. Summarized data on the three major eastern alope dams and reservoirs are as follows: . PotentIal dimensions Present , Dam or reservoir reservoir NorrnrJ capacity Tot"l Active surface Height (acre~feet) cap"city c"pacity fre" of dam (acre-feet) (acre-feet) (ceres) (fe<Jt) Sugar Loaf_ _ __~~___~___________n_______~_ 17,000 117, 000 117.000 1,550 140 Twin Lakes______~~______u____n_________ 56, 000 260, 000 260,000 4,160 105 Pueblo _' _ _ _ _ _ _ ~ _ __ _ ~ _ _ __ ~ _ _ _ __ _ _ _ _ _ _ _ _ _ ~ ___ ------------ 400,000 390 000 6,700 180 TotaL_ _ _ ~ _ ~ ~ _ ~ _ _ _ _ _ _ __ _ _ n__ _ _ _~_ ~ __ -- '-- 73,000 777,000 767,000 12,410 - ---~-----~- . .