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• Figure 1 Trihydro Flood Calculation, Jubb Creek Culvert, CN= 63 <br />JUBB_63.100 <br />100 Year Design Storm "100 Year Jubb Creek Road Crossing" CN =63 <br />BASIN CHARACTERISTICS <br />DRAINAGE AREA (SQ. MI.) ............ = 7.289 <br />STREAM LENGTH (MI.) ............. = 6.509 <br />ELEVATION DIFFERENCE (FT.) .. „ ........ = 1650.000 <br />RUNOFF CURVE NUMBER, CN ........... = 63.000 <br />MINIMUM INFILTRATION LOSS (IN.JHR.) ....... = 0.000 <br />PRECIPITATION FOR SPECIFIED STORM <br />ADJUSTED PRECIPITATION FOR SELECTED STORM (IN.) . = 2.70 <br />UNIT HYDROGRAPH PARAMETERS <br />UNADJUSTED TIME OF CONCENTRATION (HR.) ..... = 1.30 <br />ADJUSTED TIME OF CONCENTRATION (HR.) ...... = 2.19 <br />DURATION OF EXCESS RAINFALL, D (HR.) ...... = 0.29 <br />TIME TO PEAK (HR.) .............. = 1.46 <br />BASE TIME (HR.) ................. = 3.90 <br />QPEAK (PEAK FLOW IN CFS FOR UNIT HYDROGRAPH) ..= 2414.9 <br />RESULTANT HYDROGRAPH VALUES <br />PEAK DISCHARGE (CFS) .............. = 267.61 <br />RUNOFF VOLUME (ACRE -FEET) ............ = 122.26 <br />TIME TO PEAK DISCHARGE (HR) ........... = 13.98 <br />USED SCS TYPE II 24 -HOLIR GENERAL STORM <br />Page 1 <br />• <br />Exh. 24 -1 -3 Revision Date: 03/25/10 <br />Revision No.: PR -03 <br />