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<br />EXPLANA llON <br /> <br />. <br /> <br />-20-- LINE OF EQUAL MEAN <br />ANNUAL PRECIPITATION_ <br />Interval, in inches, is variable <br />-"-"- BASIN BOUNDARY <br /> <br />T"'III <br />l.akes <br /> <br /> <br />z <br />: <br /> <br />JD4Y.'~~V""D <br />:/;'"\........- ~J?y <br />,...fJ '. <br />BP-SIN. .' <br />..../.0--- <br /> <br />",-- 1030 <br />'. ,..--"..........39. <br />.\ <br /> <br />" <br /> <br />'. -.... <br /> <br />-, <br /> <br />'. <br />'s~ . <br />I~ <br />ifr, <br />'. ,~. . <br />'1 '" <br /> <br />!jf---'~ ' <br />- _. ..~20- __jl~.;' <br />.'\~: \\ \1 EX 1"\ l <br /> <br />,) ~d;' <br />l<l J",'l.'( _rl""il~ <br /> <br />) DRAINAGE <br /> <br />", <br />\", <br /> <br />f <br />~ '~ <br />("~)~ . <br />,A ) <br />_.~/ <br /> <br />From U.S. Weather <br />Bureau. 1959 <br /> <br />o <br />I <br />o <br /> <br />, <br />" <br /> <br />" <br />, <br /> <br />, <br />50 <br /> <br />50 75 MILES <br />, I <br /> <br />75 KILOMETERS <br /> <br />Figure 3.--Mean annllal precipitation. <br /> <br />Drainage <br /> <br />The Sawatch, Culebra, and Sangre de Cristo Ranges form the western <br />boundary of the Arkansas River basin (pl. 1). The Sawatch Range' separates the <br />northern part of the basin from the headwaters of the Gunnison River, the <br />Roaring Fork, and the Eagle River, all in the Colorado River basin, and the <br />Culebra and Sangre de Cristo Ranges separate the southern part of the basin <br />from the Rio Grande headwaters. The mountains in these three ranges are among <br />the highest in the Nation, with 23 peaks more than 14,000 feet. Streambed <br />elevation at the point the Arkansas River flows into Kansas is 3,350 feet. . <br /> <br />6 <br />