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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TABLE 4

PEAK DISCHARGE AND WATER SURFACE ELEVATION DATA
Upper :Boulder Creek

Distance streanJJ 10-Year 50-Year 100-Year 500-Year
Reference From Bed Flood Peak Flood Peak Flood Peak Flood Peak
Point Mouth Elevation Elevation Discharg~Elevation Discharg~Elevation Discharg~Elevation DischargeY
Identification Number Ft. Ft.-m.8.1. Ft.-m.s.l. e.r.s. Ft.-m.s.1. c.f.s. Ft.-m.a.!. c.r.s. Ft.-m.a.!. c.r.s.
95 1659+70 6293.5 6301. 4 1340 6306.0 4790 6307.4 6150 6311.2 11670
Private Drive 96 1654+60 6283.1 U/S 6289.8 U/S 6298.2 U/S 6299.2 U/S 6302.4
D/S 6288.7 D/S 6292.2 D/S 6293.4 D/S 6296.4
97 1652+90 6279.8 6286.2 6289.9 6290.9 6295.4
Private Drive 98 1652+60 6278.5 U/S 6286.2 U/S 6289.9 U/S 6290.9 U/S 6295.4
D/S 6282.7 D/S 6288.1 D/S 6289.4 D/S 6294.7
99 1648+35 6260.9 6269.1 6275.5 6275.9 6278.1
Private Drive 99.1 6258.5 U/S 6269.1 U/S 6275.5 U/S 6275.9 U/S 6278.1
D/S 6262.4 D/S 6266.1 Dls 6267.4 D/S 6271.4
100 1643+70 6244.1 6248.5 6254.9 6256.3 6260.2
101 1638+10 6226.7 6233.8 6237.0 6238.4 6242.7
Private Drive 102 1634+05 6214.5 U/S 6221. 2 U/S 6232.8 U/S 6233.8 U/S 6237.1
D/S 6220.0 D/S 6224.0 D/S 6225.0 D/S 6229.8
103 1633+75 6213.9 6220.0 6224.0 6225.0 6229.8
104 1629+50 6202.4 6206.4 6211.1 6212.5 6215.5
105 1623+85 6180.4 6187.3 6192.6 6193.9 6199.0
106 1618+95 6164.6 6168.8 6173.3 6174.7 6178.8
107 1613+85 6149.2 6155.9 6162.7 6164.4 6168.4
108 1610+10 6141.1 6146.4 6151. 0 6152.4 6157.0
109 1603+90 6114.9 6118.9 6123.0 6124.2 6127.8
110 1599+20 6099.6 6105.5 6110.1 6111. 0 6114.2
111 1593+60 6087.7 6092.5 6097.2 6098.6 6101. 7
112 1589+40 6072.5 6080.6 6084.2 6085.6 6089.1
113 1584+50 6064.6 6070.1 6076.5 6077.1 6080.4
114 1578+20 6049.6 6056.8 6059.8 6061. 7 6065.1
115 1573+15 6038.2 6043.6 6050.9 6051. 9 6055.1
Private Drive 115.5 1572+10 6031. 5 U/S 6041.2 U/S 6051.0 U/S 6052.0 U/S 6055.3
D/S 6037.4 D/S 6046.6 D/S 6047.7 D/S 6051.1
Magnolia Road 116 1568+30 6026.1 U/S 6034.0 u/s 6046.0 u/S 6047.0 u/S 6050.0
D/S 6032.6 D/S 6037.3 D/S 6038.1 D/S 6041.2
117 1567+40 6025.0 6032.6 6037.3 6038.1 6041.2
Keystone 1565+90 u/s 1350 4820 6200 11700
Gulch D/S 1390 4910 6330 11830
1/ Low water elevation as determined by aerial photogrammetric methods.
y DiSCharges are prorated between stations.

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