FLOOD00155

• County: Boulder
• Community: Boulder County
• Stream Name: Upper Boulder Creek, Fourmile Creek
• Title: Floodplain Information Report
• Date: 12/1/1981
• Prepared For: Boulder County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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I
I TABLE 4
PEAK DISCHARGE AND WATER SURFACE ELEVATION DATA
Fourmile Creek
I
I Distance StrearJI 10-Year 50-Year 100-Year 500-Year
Reference From Bed Flood Peak Flood Peak Flood Peak 2 Flood Peak
Point Mouth Elevation Elevation DisCharg~ Elevation Discharg~ Elevation DisCharge-!Elevation DisCharg~
Identification Number Ft. Ft.-m. s.l. Ft.-m.s.I. c.f.s. Ft.-m. s.l. c.f.s. Ft.-m.s.l. c.f.s. Ft.-m.s.I. c.r.s.
I 89 226+30 6467.0 6476.3 1230 6479.6 4030 6480.9 5680 6484.0 10630
Private Drive 90 226+10 6466.0 u/s 6476.3 u/s 6479.6 u/s 6480.9 u/s 6484.0
I D/S 6471.1 D/S 6475.3 D/S 6478.4 D/S 6482.0
Private Drive 90.5 223+15 6452.2 u/s 6458.7 u/s 6464.7 u/s 6478.2 u/s 6481. 6
D/S 6456.2 D/S 6460.9 D/S 6462.5 D/S 6467.0
I 91 2a +50 6444.2 6449.4 6453.6 6455.5 6460.4
92 216+95 6430.4 6435.8 6439.2 6439.8 6442.7
93 213+20 6415.5 6421. 0 6425.9 6428.3 6430.9
94 208+00 6382.5 6387.6 6391.5 6393.2 6397.1
I 95 204+20 6366.2 6370.7 6373.5 6374.7 6377.6
96 199+20 6348.8 6353.3 6357.1 6358.6 6361.9
97 194+45 6340.7 6351. 3 6354.1 6355.2 6357.8
I Private Drive 98 194+00 6339.1 U/S 6351. 3 U/S 6354.1 U/S 6355.2 U/S 6357.8
D/S 6342.2 D/S 6345.6 D/S 6347.1 D/S 6350.4
99 190+40 6325.5 6330.4 6333.1 6334.3 6337.9
100 185+55 6306.8 6311.4 6314.7 6315.7 6318.2
I 101 181+40 6292.2 6301. 7 6304.5 6305.6 6308.4
Private Drive 102 180+90 6290.9 U/S 6301. 7 U/S 6304.5 U/S 6305.6 u/S 6308.4
D/S 6296.5 D/S 6300.8 D/S 6301. 7 D/S 6303.9
I Private Drive 103 177+80 6281. 2 U/S 6290.0 U/S 6292.4 U/S 6293.4 U/S 6295.9
D/s6285.0 D/S 6287.8 D/S 6288.8 D/S 6290.8
104 177+20 6279.3 6285.0 6287.8 6288.8 6290.8
I 105 172+60 6268.3 6272.9 6275.0 6275.9 6278.1
106 168+25 6255.0 6259.0 6261. 9 6262.9 6265.2
107 162+65 6234.6 6239.9 6242.1 6243.2 6245.7
108 154+90 6212.9 6217.3 6220.6 6222.0 6224.7
I 109 149+80 6199.1 6204.2 6206.6 6207.6 6210.1
110 144+30 6163.2 6168.6 6173.4 6175.1 6179.0
111 140+70 6139.6 6144.5 6146.2 6147.0 6149.1
I 112 135+90 6122.0 6126.8 6129.8 6131.1 6134.4
113 131+65 6109.3 6113.5 6116.7 6118.1 6121. 6
114 127+55 6091. 4 6094.8 6096.9 6098.0 6100.5
I 115 123+90 6077.2 6082.0 6085.9 6087.4 6090.7
116 120+20 6067.0 6072.1 6074.7 6076.0 6079.4
117 116+15 6053.4 6059.1 6060.5 6061. 3 6063.5
118 109+85 6032.5 6036.6 6039.9 6041.1 6043.4
I 119 105+20 6019.0 6026.4 6028.9 6030.2 6033.4
120 99+85 6005.7 6012.2 6016.7 6017.8 6020.4
Private Drive 121 95+10 5994.5 U/S 6003.0 u/S 6004.7 u/S 6005.7 u/S 6009.0
I D/S 5998.8 1370 D/S 6002.1 4310 D/S 6003.5 6030 D/S 6007.1 11280
~/ Low water elevation as determined by aerial photogrammetric methods.
I y Discharges are prorated between stations.
I 18
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