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<br />I <br /> <br />I, <br />I <br /> <br />t., <br />.. <br />~; <br />,. <br /> <br />On the main st~, the flood plain is narrow.to a point a few miles <br />above Laporte, ,,!here it increases rather abruptly to more than <br />1,100 feet. Below that point, the flood plain widens more gradu- <br />ally to an average width of 4,800 feet or more in the vicinity of <br />Fort Collins. It has an average width of approximately 4,000 feet <br />just above Greel,ey, 3,800 feet through most of Greeley, and 3,500 <br />feet just below Greeley where it widens to nearly 1.5 miles just <br />upstream of the mouth. The flood plain of Boxelder Creek, the <br />largest tributary in the plains area of the basin, is several <br />hundred feet wiqe along the stream's upper reaches and over 3,000 <br />feet wide. from ~he town of Wellington to its confluence with the <br />Cache la Poudre River just downstream of Fort Collins. Other tribu- <br />tary flood plai~s in the plains section of the basin are substan- <br />tially narrower, <br /> <br />FLOOD PLAIN LAND USE <br /> <br />Flood plains in the mountainous section of the basin are <br />covered mostly 1fith trees and brush and are undeveloped, with <br />little potential for major economic damage from flooding. The only <br />, <br />town extending into a flood plain in this portion of the basin is <br />, <br />the unincorporated town of Livermore, on the North Fork, which <br />had' a population of'764 persons.in 1970. <br /> <br />In the pla+ns section of the basin, most of the flood plain <br />lands along bot~ the main stem and tributary streams are used for <br />agriculture suc!!. as irrigated cropland, dry-farmed crop- <br />land, pasture, or rangeland. Portions of several towns, however, <br />are located within these flood plains. Along the main stem, these <br />include incorporated Bellvue, part of which lies within the flood <br /> <br />7 <br />