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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />North St. Vrain & St. Vrain Creeks <br />Floodplain Update <br /> <br />Town of Lyons <br /> <br />TABLE 5 <br />ROUGHNESS COEFFICIENTS <br /> <br />Un" <br /> <br />Channel <br />Floodplain <br /> <br />.030 - .040 <br />.040 - .065 <br /> <br />A detailed description of the hydraulic analysis and Manning's "n" report is included in the <br />Technical Addendum. <br /> <br />Flood elevations and discharges for the 10-, 50-, 100-, and 500-year events for each reference <br />cross section are listed in Table 6. Selected cross-sections from throughout the study reach are <br />depicted, with the 10-, 50-, 100-, and SOD-year water surface elevations, in the Technical <br />Appendix. <br /> <br />Floodplain Illformation Report 26 <br />K:1356001004IFLOODPLAIN INFORMATION REPORT.doc <br /> <br />JUIT. 1998 <br />