Laserfiche WebLink
<br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- - <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />----.~-- -'" r-- <br /> <br />BOX ELDER CREEK VALLEY <br /> <br />The narrow valley of Box Elder Creek extends almost the full <br />length of the report area, a distance of aOO\\t 40 miles. Box Elder <br />Creek follows a course along the east side of its valley through most <br />of its course in the report area; in the lower reaches or the valley the <br />channel of the creek has been repositioned b~- dredging. Rolling up- <br />lands border the valley and, in some places where the creek has cut <br />laterally into the bedrock, the valley wall is IL rather steep bluff. <br />From the southern. boundary or the report area the valley trends <br />northward to its junction with Beebe Draw, where it turns northeast- <br />ward away from Beebe Draw and leaves tIll' area near Kuner. The <br />floor of the valley is an uneven surface of low mounds and shallow <br />depressions, and north or Hudson it is fornwd by ~and dunes. Sand <br />dunes also lap onto the east side of the va Hey floor in the northern <br />reach. <br />The ancestral valley was eroded into the Dawson arkose in the <br />extreme southern part of the area, into undifff:rentiated Cretaceous <br />aild Tertiary deposits in the s011thern and ~l'ntral parts, and into the <br />Laramie formation in the northern part (pl~. 1 and 4). The bedrock <br />formations ure mantled by unconsolidated delJlNits except for a few <br />outcrops along the stream valley. The \'lIlley.fill deposits range in <br />thickness from about 85 feet in the deepest pan to 0 along the sides. <br />Slope wash rringes the valley fill in most p\ar:I:S. The width or the <br />fill ranges from 1 to 2% miles, except in T. .1 ~.. R. 64 "V., where the <br />width increases to about 3% miles. Logs of wloIls and test holes show <br />that. the valley-fill deposits consist of sand, ~1'a";f:I, and clay, and that <br />they do not contain abundant cobhles and !,ollld':Ts as do the valley-fill <br />deposits in Beehe Draw lUld in the South PJllfft~ J~jv'er valley. <br />The water table in the Box Elder Cre(:k I'<d.p.y slopes in a general <br />downvalley direction. The gradient of Iii" 'Xater tl1ble averages <br /> <br />- <br /> <br />III <br />Iii <br />i <br />i <br />\ <br />I <br />!\ <br />" <br /> <br />'i <br />i <br /> <br />I <br />I' <br />'I <br />