Page 96

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Title
Page 96
Source
Colorado River problem
Is Part Of
http://digital.library.unlv.edu/u?/dig,8
Full text
WEYMOUTH ON THE COLORADO RIVER PROBLEM 401 dam sites, it is believed that the layouts presented in Figs, 22 and 23 cover all the more favorable plans. TABLE 31.—Statistics of Plans for Colorado River Development. Conditions with Present-Day Water Supply. Conditions with Full Up-Stream Development and Complete Up-Stream Storage Control. Total storage capacity for silt, Plan. Cost per installed horse-power. floods, and Total Total Cost per installed horse-power. Total equating head utilized horsepower Total cost. horsepower Total cost. Average evaporation loss in second-feet. stream flow, in in feet. available. available. acre-feet. A 1,353 3,080,000 $339,000,000 $110 2,810,000 $316,000,000 $111 1,400 32,700,000 B 1,283 3,155,000 359,000,000 113 2,620,000 312,000,000 118 1,550 38,900,000 C 1,338 2,665,000 331,000,000 122 2,810,000 336,000,000 119 1,100 20,700,000 D 1,338 2,350,000 303,000,000 128 2,825,000 331,000,000 116 940 14,900,000 E 1,352 3,280,000 388,000,000 116 2,900,000 341,000,000 117 2,110 41,600,000 F 1,282 3,317,000 398,000,000 119 2,715,000 335,000,000 123 2,260 47,800,000 G 1,337 2,967,000 370,000,000 126 2,905,000 354,000,000 121 1,810 29,600,000 H 1,337 2,770,000 356,000,000 126 2,920,000 356,000,000 121 1,650 23,800,000 In comparing these plans as regards their most important features (Tables 31 and 32), two conditions of water supply have been assumed, namely, present supply without up-stream control and possible future supply with stream flow fully equated. Neither condition will ever fully materialize. By the time the entire river below the Park can be put to power use, much irrigation and power development may take place above. Full control of the river by up-stream storage is impracticable. Actual conditions will gradually leave the "present" status and approach that of full up-stream development. TABLE 32.—Comparison of Plans for Colorado River Development. Conditions with Present-Day Conditions with Full Up-Stream Development Water Supply. and Complete Up-Stream Storage Control. Plan. Total horse-power available. Plan. Total cost. Plan. *. Plan. Total horse-power available. Plan. Total cost. Plan. cost per installed horse-power. Plan. Plan. 08 It F 3 3,317 000 D $303 000 000 A $110 H 2 920 000 B $312 000 000 A $111 D 940 F 47 800 000 E 33 ,280 000 C 331,000 000 113 G 2 905 000 A 316 000 000 D 116 C 1 100 E 41 600 000 B 3 155 000 A 339 000 000 E 116 E 2 900 000 D 331 000 000 E 117 A 1 400 B 38 900 000 A 3 080 000 H 356 000 000 F 119 D 2 825 000 F 335 000 000 B 118 B 1 550 A 32 700 000 G 2 967 000 B 359 000 000 C 122 A 2 810 000 C 336 000 000 C 119 H 1 650 G 29 600 000 H 2 770 000 G 370 000 000 G 126 C 2 810 000 E 341 000 000 G 121 G 1 810 H 23,800,000 C 2 665 000 388 000 000 H 126 F 2 715 000 G 354 000 000 H 121 2 110 C 20 700 000 D 2 350 000 F 398 000 000 D 128 B 2 620 000 H 356 000 000 F 123 F 2 260 D 14,900,000 * Based on estimates for installations using convenient power units with total power approximating available power. † Based on complete equation of stream flow by up-stream storage. ‡ Total capacity behind dams, except lower 67 ft. of Parker Dam. The evaporation from the reservoirs is based on an estimated loss of 5 ft. per year over the mean exposed area in each case. This value may be con-

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