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<br />. <br /> <br />15. <br /> <br />'. <br /> <br />feet per mile) in Oklahana, 4.4 feet per mile. Throughout Texas and <br />Oklahoma the watershed 1s very narrow with no large tributaries entering. <br />Major floods of approximately 200,000 o.r.s. occur" on an average of 1 in <br />18 years, moderate floods or greater, 1 in 4 years, and minor floods or <br />greater. about 1 in 2-1/2 years. Channel capacity Is about 70,000 e,f,s, <br />fram the N~ Mexloo_Tex&a line to the mouth. <br /> <br />f <br /> <br />3. The recently oompleted Conchae Dam Is located aoross the South <br />Canadian River about 27 milos northwest of Tuoumoari, N.U. This reser- <br />voir was built for the dual purpose of flOOd control and irrigation. The <br />Bureau of Reolamation and the Aroh Hurley Conservanoy Distriot have con- <br />traoted for an irrigation projeot in conneotion with this reservoir in- <br />volving some 45,000 acres of land downstream. The Bureau of Recl&m&tiol <br />is now oonstruoting the necessary distribution system for this project. <br />Conohas reservoir is e%peoted to reduoe materially flood damages in the <br />South Canadian Vlllley below. <br /> <br />4. The flood plain of the South Canadian River below Conchas Lam <br />and its principal tributaries contains appro%imAtely 196,000 aores, of <br />which 62,000 acres are cuI tivated and 134,000 acres gru1ng and W8.st61 <br />land. The flood plain above Conchas Dam contains 4.000 acres which i3 <br />all grazing and waste land. Past and probable future direct flood 10sse. <br />are comparatively small. because of the lack of extensive improvements in <br />the flood plain of the main steD and its principal tributaries. <br /> <br />. <br /> <br />H. The C1marron River <br /> <br />1. The Cimarron River rises in Colfax County in northeast New <br />Yexioo and flows in a general easterly direction through Colorado, Kansas <br />and Oklahoma to join the Arkansas 17 miles above Tulsa. The topography <br />of the watershed varies from a-high rolling plateau and mountainous region <br />in its upper reaches to a high, gently sloping plain section along most <br />of its middle reach, and a low. rolling section bordered by broken bluffs <br />and hilla in its lower reaches. It drains 18.060 square miles and has a <br />length of about 600 miles. <br /> <br />, <br /> <br />2. There are approx1m&tely 286,000 aores in the flood plain of the <br />Cimarron River. of which 86,000 aores are cultiTated, 156,000 in pasture, <br />44.000 in unused and timber lands. It has no irr.portant tributaries. The <br />watershed is devoted prinoipally to agrioulture and stook raising. The <br />production of gas and oil affords the greatest souroe of inoome in the <br />erlreme eastern portion of the watershed. The CilMrron lI1ltershed has had <br />numerous floods of a more or less local character, but there is no record <br />of a flood that was of major proportions along the entire River. The maxi- <br />mUQ reoorded discharge near the mouth is 72,300 o.f.s. at Oilton. Okla. <br /> <br />. <br /> <br />3. Two separate and distinot proble~ involving the control of <br />floods and the beneficial uses of wat er exist on the Cimarron River. In <br />the western semi-arid region. the storage of flood waters for irrigation <br />is essential. On the lower river a reservoir is desirable to control <br />the floods on the Cimarron largely for the benefit of the Arkansas River <br />valley, with incidental benefit. to the Uississlppi River. <br /> <br />. <br />2399 <br />