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<br />. <br /> <br />3) Distance from downstream limit of basin to centroid <br />of area in miles, LCA; <br /> <br />4) Slope of thalweg in feet per foot, S. <br /> <br />Along with the mapping procedure, a narrative description*was <br />prepared for each basin giving the following information: <br /> <br />1) Description of general characterist.ic of the basin <br />in relation to urban drainage, i.e., relative urban, <br />rural, commercial and industrial development., <br />including an estimate of CUHP coefficients related t.o <br />the present conditions. <br /> <br />2) Identification and description of principal drainage <br />problems and significant drainage features, including <br />any artificial or manmade divides or alteration of <br />drainage boundaries. <br /> <br />Procedure <br /> <br />To provide the basic information needed for problem area <br />identification and priority determination and to furnish a physical <br />description of major drainage channels and drainage features, five <br />consulting engineers, experienced in regional drainage, were select.ed <br />for the drainage mapping. The consultants and the quadrangle sheets <br />included in their mapping task were: <br /> <br />. <br /> <br />William B. McDowell & Associat.es <br /> <br />1) Longmont <br />2) Hygiene <br />3) Lyons <br />4) Boulder <br />5) Niwot <br /> <br />6) Erie <br />10) Lafayette <br />11) Louisville <br />12) Eldorado Springs <br /> <br />Black & Veatch, Inc. <br /> <br />7) Mile High Lakes <br />8) Brighton <br />9) Eastlake <br /> <br />17) Sable <br />18) Box Elder School <br /> <br />Frasier & Gingery, Inc. <br /> <br />13) Ralston Butte <br />14) Golden <br />15) Arvada <br />22) Fort Logan <br /> <br />23) Morrison <br />24) Evergreen <br />25) Indian Hills <br />26) Littleton <br /> <br />* Information from the narrative descriptions was incorporated into <br />Subbasin Description Summary Sheets, in this report. <br /> <br />. <br /> <br />6 <br />