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<br />I <br /> <br />I <br /> <br />I <br /> <br />R:\35600\FLOODPLAIN\T ABLE5.XLS <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />1 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />126 <br />128 <br />130 <br />132 <br />134 <br />136 <br />138 <br />140 <br />144 <br />146 <br />148 <br />150 <br />152 <br />152.8 <br />15209 <br />153 <br />15303 <br />15305 <br />154 <br />155.5 <br />157 <br />159 <br />15905 <br />160 <br />162 <br />163 <br />16305 <br />164 <br />166 <br />168 <br />170 <br />172 <br />174 <br />176 <br />17605 <br />177 <br />178 <br />180 <br />182 <br />185 <br />18505 <br />186 <br />190 <br />192 <br />196 <br />198 <br /> <br />1831+33 <br />1837+33 <br /> <br />1810+60 <br />1811+23 <br />1811+43 <br />1821+08 <br />1830+03 <br /> <br />5387.50 <br />5396000 <br />5404.30 <br />5406000 <br />5412.00 <br /> <br />5390.82 <br />5398.49 <br />5407.68 <br />5409.33 <br />5415.13 <br /> <br />6/15/98 <br /> <br />965 <br />946 <br />946 <br />946 <br />946 <br /> <br />10:09 AM <br /> <br />5393.60 <br />5400.42 <br />5410000 <br />5411.27 <br />5418.33 <br /> <br />2750 <br />2700 <br />2700 <br />2700 <br />2700 <br /> <br />5395052 <br />5400.78 <br />5410.92 <br />5411.86 <br />5419.42 <br /> <br />4170 <br />4090 <br />4090 <br />4090 <br />4090 <br /> <br />5405.32 <br />5405.46 <br />5412015 <br />5413.46 <br />5420.88 <br /> <br />0273 <br />10095 <br />0095 <br />0095 <br />0095 <br /> <br />1776+00 <br />1783+90 <br />1784+45 <br />1785+10 <br />1786+30 <br />1786+40 <br />1787+80 <br />1794+90 <br />1805+30 <br /> <br />U.S. Highway 36 <br /> <br />5364050 <br />5365.90 <br />5372000 <br />5382.20 <br />5387.50 <br /> <br />5368.09 <br />5368.89 <br />5375.14 <br />5384.18 <br />5389.88 <br /> <br />984 <br />984 <br />965 <br />965 <br />965 <br /> <br />5371.30 <br />5371.46 <br />5377.32 <br />5385.93 <br />5391.31 <br /> <br />2800 <br />2800 <br />2750 <br />2750 <br />2750 <br /> <br />5373.97 <br />5374.04 <br />5378.25 <br />5387.06 <br />5392.49 <br /> <br />4240 <br />4240 <br />4170 <br />4170 <br />4170 <br /> <br />5377056 <br />5377069 <br />5379091 <br />5388.58 <br />5396.06 <br /> <br />0451 <br />1 0451 <br />10273 <br />0273 <br />0273 <br /> <br />1750+15 <br />1758+50 <br />1768+00 <br /> <br />UoS. Highway 36 <br /> <br />5328.50 <br />5337.00 <br />5348.20 <br />5357020 <br />5362090 <br />5363070 <br />5364.50 <br /> <br />5331.93 <br />5340.04 <br />5351.70 <br />5360.55 <br />5366.65 <br />5367019 <br />5367.31 <br /> <br />1000 <br />1000 <br />1000 <br />984 <br />984 <br />984 <br />984 <br /> <br />5335.41 <br />5342.28 <br />5354097 <br />5363.50 <br />5368.81 <br />5370.19 <br />5370.28 <br /> <br />2850 <br />2850 <br />2850 <br />2800 <br />2800 <br />2800 <br />2800 <br /> <br />5371 <br />5371 <br /> <br />5336061 <br />5343.57 <br />5356.04 <br />5364.59 <br />5369.96 <br /> <br />65 <br />67 <br /> <br />4310 <br />4310 <br />4310 <br />4240 <br />4240 <br />4240 <br />4240 <br /> <br />5340083 <br />5348.14 <br />5358.99 <br />5367.17 <br />5372.87 <br />5372098 <br />5373.32 <br /> <br />0630 <br />0630 <br />0630 <br />10451 <br />0451 <br />0451 <br />0451 <br /> <br />1738+70 <br />1744+70 <br />1748+30 <br />1749+55 <br />1750+05 <br /> <br />1724+15 <br />1727+20 <br />1728+50 <br />1729+10 <br />17~9+30 <br />1732+20 <br /> <br />State Highway 7 <br /> <br />5308.50 <br />5312.30 <br />5319.00 <br />5323.30 <br />5327030 <br />5328050 <br /> <br />5312097 <br />5315.93 <br />5322.75 <br />5326.71 <br />5330.42 <br />5331.61 <br /> <br />2110 <br />2040 <br />1000 <br />1000 <br />1000 <br />1000 <br /> <br />5315056 <br />5318.41 <br />5324.91 <br />5330.04 <br />5332.40 <br />5335.04 <br /> <br />5645 <br />5570 <br />2850 <br />2850 <br />2850 <br />2850 <br /> <br />5317039 <br />5320.13 <br />5326000 <br />5330.76 <br />5334052 <br />5335077 <br /> <br />8920 <br />8880 <br />4310 <br />4310 <br />4310 <br />4310 <br /> <br />5320076 <br />5322016 <br />5328.40 <br />5332.40 <br />5337.45 <br />5340.75 <br /> <br />20220 <br />20260 <br />10630 <br />10630 <br />0630 <br />0630 <br /> <br />Confluence <br /> <br />Second Avenue Bridge <br /> <br />5305.00 <br />5306.08 <br />5307.40 <br />5308050 <br /> <br />5310.98 <br />5311.02 <br />5312.62 <br />5312097 <br /> <br />2110 <br />2110 <br />2110 <br />2110 <br /> <br />5313.99 <br />5313.84 <br />5315.20 <br />5315.54 <br /> <br />5645 <br />5645 <br />5645 <br />5645 <br /> <br />5315.88 <br />5316.00 <br />5316069 <br />5317.38 <br /> <br />8920 <br />8920 <br />8920 <br />8920 <br /> <br />5319.38 <br />5319035 <br />5319061 <br />5319.60 <br /> <br />20220 <br />20220 <br />20220 <br />20220 <br /> <br />I <br /> <br />1669+55 <br />1672+75 <br />1673+75 <br />1682+55 <br />1693+95 <br />1697+35 <br />1698+25 <br />1702+35 <br />1709+05 <br />1713+25 <br />1714+55 <br />1719+30 <br />1723+30 <br />1723+56 <br />1723+60 <br /> <br />Pedestrian Bridge <br /> <br />I <br /> <br />I <br /> <br />Ref. <br />Section <br />Number <br /> <br />(feet) <br />1662+55 <br /> <br />Station <br />from Mouth <br /> <br />U.So Highway 36 <br /> <br />Location <br /> <br />5288.00 <br />5290.00 <br />5294.00 <br />5295.00 <br />5297.00 <br />5302050 <br />5304.80 <br /> <br />Stream Bed <br />Elevation <br />(Ft. MSL) <br />5254.20 <br />5264.60 <br />5265.40 <br />5268.10 <br />5270.30 <br />5277.60 <br />5283020 <br /> <br />5290039 <br />5294028 <br />5298.11 <br />5300.29 <br />5301.88 <br />5306.04 <br />5309.43 <br /> <br />Crest <br />Elev. <br />(Ft. MSL) <br />5259.30 <br />5268.04 <br />5270.09 <br />5271015 <br />5275.84 <br />5282.41 <br />5286075 <br /> <br />10-Year Flood <br />Peak <br />Discharge <br />(cfs) <br />2320 <br />2320 <br />2250 <br />2250 <br />2250 <br />2250 <br />2250 <br />2180 <br />2180 <br />2180 <br />2180 <br />2110 <br />2110 <br />2110 <br /> <br />50-Year <br />Crest <br />Elev. <br />(Ft. MSL) <br />5263.09 <br />5269.37 <br />5271.84 <br />5273.30 <br />5277.45 <br />5284.49 <br />5289.52 <br />5292.43 <br />5296.57 <br />5300.28 <br />5303.41 <br />5304.48 <br />5307.39 <br />5312.05 <br /> <br />5894 <br />5811 <br />5811 <br />5811 <br />5811 <br />5811 <br />5728 <br />5728 <br />5728 <br />5728 <br />5645 <br />5645 <br />5645 <br /> <br />Peak <br />Discharge <br />(cfs) <br />5894 <br /> <br />Crest <br />Elev. <br />(Ft. MSL) <br />5265068 <br />5270.03 <br />5272.70 <br />5274001 <br />5278.46 <br />5286089 <br />5291.45 <br />5293.16 <br />5297.63 <br />5301.27 <br />5304.74 <br />5305052 <br />5308053 <br />5313036 <br /> <br />9050 <br />9010 <br />9010 <br />9010 <br />9010 <br />9010 <br />8960 <br />8960 <br />8960 <br />8960 <br />8920 <br />8920 <br />8920 <br /> <br />Peak <br />Discharge <br />(cfs) <br />9050 <br /> <br />5306011 <br />5308.12 <br />5310.92 <br />5316.50 <br /> <br />Elev. <br />(Ft. MSL) <br />5269.17 <br />5274.80 <br />5275.33 <br />5276.04 <br />5280.70 <br />5289032 <br />5293.34 <br />5294.68 <br />5299.01 <br />5304.14 <br /> <br />500- Year <br />Crest <br /> <br />20184 <br />20184 <br />20220 <br />20220 <br />20220 <br /> <br />20112 <br />20148 <br />20148 <br />20148 <br />20148 <br />20148 <br />20184 <br />20184 <br /> <br />Peak <br />Discharge <br />(cfs) <br />20112 <br /> <br />I <br /> <br />I <br /> <br />Flood <br /> <br />TABLE 6 <br />FLOOD FREQUENCY ELEVATION AND DISCHARGE DATA <br />NORTH ST. VRAIN AND ST. VRAIN CREEK, BOULDER COUNTY, COLORADO <br /> <br />100-Year Flood <br /> <br />Flood <br />