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associated with plants at a specific location with an identifiable source of supply and in the aggregate averaged abou t 405,000 acre-feet per annum in 1965. Livestock production is an important part of the agricultural industry within the basin, accounting for 70 percent of the average annual agricultural income. Because the raising and feeding of livestock is so important in the basin's economy, water supplies for livestock use have a high priori ty, ranking along with domestic uses in most States. The storage or withdrawal of streamflow generally must not interfere with down- stream livestock use and, in most of the basin States, the construction of stockwater ponds is not legally restricted except in size and height. Livestock water supplies are those required to service the predominantly commercial livestock enterp'rises, including animals and fowl in feedlots, rearing pens, and pasture areas. Beef cattle and calves currently use about two-thirds of the livestock water in the basin. Dairy cows and swine use significant amounts in the eastern subbasins while sheep are significant users in the western subbasins. Lesser amounts of water are required for chickens and turkeys. Present estimates are that an average of about 392,000 acre-feet of water are with- drawn annually for livestock use in the basin. Thermal-electric power water use is primarily for purposes of condenser cooling. Total streamflow diversions for such use were about 1.7 million acre-feet in 1965, the' largest inudstrial water use in the basin aside from irrigation. Because of the importance of this industry to the basin economy and the large water demand, it has been discussed in a separate section of this chapter, but the current total withdrawal is included in table 34 to provide complete coverage of the industrial usage. The current (1965) annual municipal and rural domestic, industrial, and livestock water use is sum- marized in table 34. The water withdrawn for these uses is nearly 3.7 million acre-feet, of which only 0.7 million acre-feet is consumptively used. The total use shown does not include the evaporation loss from 314,000 stock ponds. Their water use is accounted for in the evaporation loss estimates for all small impoundments in the 1970 condition streamflow analysis. Table 34 - MUNICIPAL AND RURAL DOMESTIC, INDUSTRIAL, AND LIVESTOCK WATER USE, 1965 Average Annual Water Withdrawal 1 Industrial Municipal and Thermal-Electric Other Subbasin Rural Domestic Mineral2 Power Industry Livestock Total (Thousand Acre-Feet) Upper Missouri 46 2 -- - 31 22 101 Yellowstone 41 16 97 89 20 263 Western Dakota 25 19 49 10 29 132 Eastern Dakota 54 4 17 2 48 125 P1atte-N iobrara 365 28 454 142 81 1,070 Middle Missouri 154 -- - 480 11 72 717 Kansas 123 9 19 24 54 229 Lower Missouri 255 4 608 96 66 1,029 Missouri Basin 1,063 82 1,724 405 392 3,666 1 Does not include an annual stockpond evaporation loss of 824,000 acre-feet. 2Does not include water for processing sand and gravel. Thermal-Electric Plants Utilize Large Quantities of Fossil Fuels and Water 74 Electric Power Generation The electric power industry, one of the fastest growing industries in the basin, supplies power from a variety of generating plants. In 1965 the Missouri Basin contained 557 electric systems with an aggregate installed capacity of 10,155 megawatts and 1965 --generaH6i1-c)(j7-6illlon Kilowatt hours--:--lnadCliHon, non-utility generating capacity (largely industrial) was 156 megawatts, and the 1965 generation was 660 million kilowatt-hours. The 557 electric systems include 359 municipal or other publicly owned systems, 164 cooperative systems, 33 investor-owned, and one Federal hydroelectric system. The investor-owned systems have about 50 percent of the basin's generating capacity and supply about 60 percent of the energy requirements.