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<br />(\~2(}52. <br /> <br />ARIZONA V. CALIFORNIA AND PACIFIC SOUTHWEST WATER.PROBLEMS 55 <br /> <br /> Development year <br /> Item Present 1975 1990 2000 2020 2030 <br />Depletions-Glen Canyon to Lake Meadl___ 0.260 0.450 0.470 0.490 0.490 0.490 <br />Lake Mead evaporation___________________ 0.800 0.900 0.850 0.830 0.800 0.800 <br />Southern Nevada uses from Lake Mead_____ 0.020 0.100 0.150 0.180 0.280 0.300 <br />Southern California llses___________________ 6.640 7.780 8.830 9.620 10.630 11.180 <br />Arizona uses. _ _. __ __ _ _ _ __ _ _ _ _ _ __ _ __ un __ 3.855 4.475 4.765 5.025 5.585 5.725 <br />MaiI13tream Indian uses below Hoover Dam__ 0.150 0.360 0.550 0.550 0.550 0.550 <br />Fish and Wildlife uses_____________________ 0.025 0.180 0.340 0.340 0.340 0.340 <br />Net mainstream losses-Hoover Dam to <br />Mexico including excess arrivals into <br />Mexico_____ __ _ _ __ _ _____ _ _ __ _ _ ____ _.___ 1.270 1.270 1.270 1.270 1.270 1.270 <br />Mexican Treaty obligation_________________ 1.500 1.500 1.500 1. 500 1. 500 1. 500 <br /> Total water requircment______________ 14.520 17.015 18.725 19.805 21.445 22.155 <br /> <br />TABLE XIII <br />PACIFIC SOUTHWEST WATER REQUIREMENTS, USDI ESTIMATE <br /> <br />(Unit: million acre-feet) <br /> <br />Source: Pacific Southwest Water Plan, Report of January 1964, Table 13, p. IV-2 and V.S.B.R. rough estimate of ex- <br />tension for development years 2020 and 2030. <br />1 Includes future reservoir evaporation and Dixie projects and other future tributary projects. <br />From: Colorado River Board. <br /> <br />TABLE XIV <br />SUMMARY <br /> <br />Pacific Southwest Water Deficiency, USDI Estimate and CRB Modification <br /> <br />(Unit: million acre-feet) <br /> <br /> Development year <br /> Item Present 1975 1990 2000 2030 <br />A. United States Department of Interior estimate <br />L Total water requirement______________________ 14.520 17.015 18.725 19.805 22.155 <br />2. Total water supply___________________________ 13.160 15.980 16.700 16.325 15.945 <br />3. Difference________ _ _ _ _ ___ _ _ _ _ __ ~ _ ____ _ _ _ _ __ __ 1.360 I 035 2.025 3.480 6.210 <br />4. Estimated unrecovered conveyance losses asso- <br /> ciated with import required to satisfy deficiency 70 50 100 170 310 <br />5. Total water deficiency________________________ 1.430 I. 085 2.125 3.650 0.520 <br />B. Colorado River Board modification <br />L Total water supply_n________________________ -------- 15.255 15.945 15.745 15.615 <br />2. Difference (line Al - B1)~~__________~_______ -------- I. 760 2.780 4.060 6.540 <br />3. Estimated unrecovered conveyance losses 38'0- <br /> ciated with import required to satisfy deficiency -------- 0.090 0.140 0.200 0.330 <br />4. Total water deficiency________________________ -------- I. 850 2.920 4.260 6.870 <br /> <br />Sources;:'USDI Estimate-Pacific Southwest Water Plan, Report of January 1964, Table 16, p. IV-ll and U.S.B.R. rough <br />estimate of extension for year 2030. <br />From: Colorado River Board. <br />