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<br />~. <br /> <br />FIgure 1.1 Upper Mississippi River Basin. . <br /> <br />"I <br />.1.1: <br />I! <br /> <br />THE FLOOD OF 1993 <br /> <br /> <br />.~ <br /> <br />areas to crops.' Some areas were protected with agricultural <br />levees. <br /> <br />Early development of the basin was closely tied to the river <br />system, and many navigation and local flood.control effotts <br />were installed without federal assistance. By the early 1900s, <br />t1ie tJiiiiin's fisheries resources we're declining as a result of <br />various environmental perturbations, sedimentation, pollution, <br />and water,level fluctuations caused by deforestation and <br />agricultural development. Between 1930 and 1950, extensive <br />modification continued on the main rivers, while upland areas <br />continued to be drained for agricultural purposes. Major <br />urban areas such as St. Louis, Kansas City, and <br />Minneapolis/St. Paul developed as business and industry <br />centers. <br /> <br />The Midwest Flood of 1993, one of the most costly <br /> <br />'. <br />" <br /> <br /> <br />5 <br />