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<br />., <br /> <br />14 <br /> <br />. <br /> <br />Deep Fork River, 2,540 square ndles, are the prinoipal ~ributarieB. Ap- <br />proximately 75 per cent of the watersh6Cl lies in the sami1rid region <br />west of the 99th meridian. <br /> <br />, <br /> <br />2. Major floods oocur about once in 25 years in the ~~stern portion <br />of' the watershed and about once in 50 yea.rs in the eastern watershed. The <br />greatest flood of reoord occurred in October 1923, with &Xl estimated pea.k <br />!'low at "::oodward of' 12},OOO c.r.s. and 110,000 c.f.8. at Oklaooma City. <br />The flood plain contdns about 207,000 aores of' cultivated land and <br />296,000 acras of gra.z ing, and waste land. The 8:stilrut.ted average &rmua.! <br />flood 10B8 is 3650,000, of whioh about 55 per cent is orop }OS8. The <br />high relative 10as to other than crops 1s due to the many miles of rail- <br />roads am. highways, as well as parts of urban centers that are located <br />within the flood plain. The total property values in the overflow area are <br />estbl8.ted at more than ~46,ooo,ooo and the average orop value is ;5,500,000.. <br /> <br />3. The 1936 Flood Control Act authorized the oonstruction of Optima <br />8.00 Fort Supply reservoirs, and Canton reservoir "l8.8 authorized by the <br />Flood Control Aot of 1938. Optima. reservoir site 13 located on the main <br />stem of North Cane.dia"l River about 15 miles east of Guymon, Okla. A re- <br />servoir of about 80,000 aore-feet capacity has been considered at this <br />site, which, with Fori: Supply and Canton reservoirs, would give the max- <br />imum possible flood protection to the upper North Canadian valley. Noth- <br />ing has been done toward the design or construction of this reservoir. <br />The preliminary ex8Jnination report on this stream completed two years <br />ago recomn.ended Investi~nting the Hardesty site 14 miles below the Optima <br />site where greater oapacity is available. <br /> <br />4. Fort Supply reservoir site is located on ~olf Creek about 3 <br />miles above its confluence '\"lith the North Canadian River, 1 mile south of <br />the town of Supply, Okla., and 14 miles northwest of \'/oodward. Canton <br />dam site is approximately 80 miles upstream from Oklahoma City on the <br />Nori:h Can&dian River. These reservoirs have been discus.l;ed above. <br /> <br />t <br /> <br />. <br /> <br />G. South Canadian River <br /> <br />~ <br /> <br />1. The South Ca.na.dian River rhes in the Cimarron and Sangre de <br />Cristo Ucnmtaln..s near the Colorado-liew Uex.ioo state Une, and flows <br />southerly and easterly through New Uexico, Texas and Oklahoma, and <br />en'ters the Arlalne&s River 26 mile::;: be1cnr lauflkol;88, Okla. It has a <br />leng~h of 906 miles and drains 30,650 square miles, exolusive of North <br />Canadian River buin, of which 15,200 square m1lu, or about 50 per cent <br />of the drainage area are situated in the high plateau and I:lOuntainou8 <br />regions of New 1!exico, some of which are 12,000 feet above mean sea <br />level. In eutern Hew J.:e.xioo and northern Texas the stream ohannel 18 <br />cut deeply below the agricultural lands of the plateau or mesa. In <br />western Oklahoma the river enters a broader valley. <br /> <br />. <br /> <br />2. It is in the upper pla1:eau region that storms of oloudburs1: <br />intensity oocur and, with the rapcld rate of run-off, cause excessive <br />stream flows to pass downstream ~hrou~ Texas a.nd Oklahoma.. The average <br />fall of the stream is: In l:ew llexico, 17.5 feet per ::nile; in Texas, 4.8 <br /> <br />2400 <br />