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<br />North St. Vrain & St. Vrain Creeks <br />Floodplain Update <br /> <br />Town of Lyons <br /> <br />TABLE 5 <br />ROUGHNESS COEFFICIENTS <br /> <br />"n" <br /> <br />Channel <br />Floodplain <br /> <br />.030 - ,040 <br />,040 - ,065 <br /> <br />A detailed description of the hydraulic analysis and Manning's un'" 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 500-year water surface elevations, in the Technical <br />Appendix, <br /> <br />Floodplain Information Report 26 <br />K:\35600\004\FLOODPLAIN INFORMATION REPORT,doc <br /> <br />June 1998 <br />