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<br />FIGURE 31 <br />TOTAL DISSOLVED SOLIDS IN GROUND WATER <br /> <br />~ ~I <br /> <br />~\ <br /> <br />~ <br /> <br />r--- <br />\ <br />'t <br /> <br /> <br />~ <br /> <br />N <br /> <br />t <br /> <br />SCAL [ 1/11,500,000 <br />o \00 <br />APPROXIMATE SCALE IN MILES <br /> <br />200 <br /> <br />MINNIESOTA <br /> <br />LEGEND <br /> <br />. GREATER THAN <br />2000 MGI L <br /> <br />. 1000 - 2000 MG/l <br /> <br /> <br />D &00 - 1000 Mnll <br /> <br />LESS TH AM <br />D 500 MGIL <br />(or not developed) <br /> <br />KANSAS <br /> <br />~\ <br /> <br />COLORADO <br /> <br />---~r--- <br /> <br />-----{--~~~-- <br /> <br />summary includes storage reservoirs for various <br />purposes, ungation works, flood and erosion con trol <br />measures, water supply systems, electric power facilities, <br />waste treatment facilities, and navigation improvements. <br /> <br />power, navigation, and fish and wildlife and recreation <br />enhancement. The other reservoirs are largely single <br />purpose, dedicated primarily to irrigation, flood control, <br />or other water supply functions. <br /> <br />Reservoirs <br /> <br />Irrigation <br /> <br />It has long been recognized within the Missouri Basin <br />In 1965 the Missouri Basin contained 107 major that irrigation is a way of farming which provides a means <br />re~er.v.oirs,-and-1-,38.7-other-f.esef.voifs-with-individual- --of- 0 b taining-a-dependab le-and-diversified-crop-and-Iive-=-- <br />storage capacities of less than 25,000 acre-feet, which stock production capability. Some of the earliest irriga- <br />either were completed or under construction. In the tion in the basin was started about 1650 by the Taos <br />aggregate these reservoirs provide a total of over 112 Indians who lived along Ladder Creek in northern Scott <br />million acre-feet of storage capacity. The investment County, Kansas. Development of irrigation in the basin by <br />cost for this storage capacity was over $3 billion. Almost Caucasian settlers began in the early 1860's with short <br />99 percent of the total storage capacity serves multi- inexpensive stream diversions installed by individual land- <br />purpose functions, including flood control, municipal owners. Irrigation has continued to expand, starting <br />and industrial water supply, irrigation, hydroelectric principally in the arid western portions of the basin, and <br /> <br />68 <br />