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<br />r <br /> <br />I <br /> <br />0=1744 <br /> <br />- 4 - <br /> <br />I <br /> <br />I <br /> <br />DESCRIPTION OF THE \vATERSHED <br /> <br />Physical Data <br /> <br />I <br /> <br />I <br /> <br />Location.- Limon Watershed is located in Elbert and Lincoln <br />Counties in east-central Colorado, It includes lands in the drainage <br />basin or an unnamed intermittent stream that drains southeastward <br />through the Town of Limon, Colorado, The watershed contains 15,42 <br />square miles (9,870 acres), of which 8,19 square miles are in Elbert <br />County and 7,23 square miles are in Lincoln County. The area is <br />9 miles long and has a maximum width of 3 miles. It lies along the <br />north side of Big Jandy Creek and is tributary to that stream, Big <br />Sandy Creek joins the Arkansas River about 127 miles southeast of <br />Limon, <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />The watershed area contains three tributary drainages, whi~h are <br />referred to in this work plan as the West, Middle, and East drainages. <br />The West drainage occupies over one-half of the total watershed area. <br />The Middle and East drainages are smaller, with each having less than <br />one-fourth of the total watershed area. <br /> <br />I <br /> <br />The watershed heads northwest of Limon and the three tributary <br />streams drain southeastward and join near the center of the town, <br />The main stream thus formed drains southeast for about one mile to <br />the lower end of the watershed area where it joins a larger drainage, <br />Lake Creek, lying to the east of the watershed, Lake Creek enters <br />Gig Sandy Creek about one mile downstream from the watershed boundary, <br />Through the Town of Limon, the tributary streams and the main stream <br />occupy channels that are in some places natural and in other places <br />ILlan-maue. <br /> <br />I <br /> <br />I <br />!I <br /> <br />I <br /> <br />Physiography and Geolooy,- The watershed lies within the Colorado <br />Piedmont section of the Great Plains physiographic province. Elevations <br />range rrom a maximum of about 5,300 feet at the north end of the <br />watershed to about 5,320 feet at the lower end. <br /> <br />I <br /> <br />The upper one-third of the West drainage is underlain by sandstone <br />and sandy shales of the lower part of the Fox Hills formation, The <br />remainder of the watershed is underlain by dark gray to olive brovm <br />silty clay shales and sandy shales of the upper part of the Pierre <br />forraation, Deposits of alluvial, colluvial, and eolian sandy silt <br />and clay of Pleistocene and Recent age, cover the Pierre shale in <br />many places, particularly in the lower watershed area, where there <br />are very few exposures of shale, <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />