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<br />-7- <br /> <br />After the first paragraph on page 5, insert the followingl <br /> <br />, <br /> <br />"The drainage basins of those rivers in which both the United States and <br /> <br />Mexico have an interest, namely, the Colorado, Rio Grande, and Tijuana, compris~ <br /> <br />a large and important area in both oountries. <br /> <br />"Drawing SSC-l is a map of the United States and a portion of Mexioo on <br /> <br />whioh is delineated the drainage basins of these rivers. By symbols the Upper <br /> <br />and Lower Basins of the Colorado River and the Upper and Lower Basins of the <br /> <br />Rio Grande are shown. <br /> <br />"Eight states in the United States, including Arizona, California, Colorado, <br /> <br />Nevada, New Mexioo, Texas, Utah and Wyoming use the waters of these streams fo~ <br /> <br />. <br /> <br />irrigation, munioipal and other purposes. Parts of one Territory, Baja Calif- <br /> <br />ornia, and five states of the Republio of Mexioo, inoluding Sonora, Chihuahua, <br /> <br />Durango, Nuevo Ledn, Coahuila and Tamaulipas lie within the drainage areas of <br /> <br />the three rivers. The waters of the rivers are used in these Mexioan States and <br /> <br />Territory for irrigation, municipal and other purposes. The total area of the <br /> <br />United States inoluded in the oontributing portions of drainage basins of the <br /> <br />three rivers is 334,315 square mtles, 242,000 of whioh are in the Colorado River <br /> <br />Basin, 91,650 are in the Rio Grande Basin, and 465 are in the Tijuana Basin. <br /> <br />Eighty-four thousand fourteen square miles of Mexioo are in the oontributing <br /> <br />portions of the drainage basins of the three rivers, 60,600 of whioh are in the <br /> <br />Rio Grande, 2,000 are in the Colorado River, and 1,214 are in the Tijuana. <br /> <br />"Differenoes between the two oountries over the uses of the waters of the <br /> <br />4 <br /> <br />rivers have been of long standing. The first international oontroversy of <br /> <br />importanoe involved the uses of the waters of the Upper Rio Grande. Waters of <br /> <br />, <br />y <br /> <br />this river had been used for the irri~ation of lands in the Juarez Valley for <br /> <br />many years. The Mexioan Government in the early l690s alleged depletion of the <br /> <br />.,,":';"-..~ <br />