FLOOD01611

• County: Boulder
• Community: Boulder County
• Stream Name: Upper Lefthand Creek-Foothills Hwy to Peak to Peak
• Title: Flood Information Report
• Date: 8/1/1983
• Prepared For: Boulder County
• Prepared By: UDFCD
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TA8LE 6 (Continued)

FLOOD FREQUENCY-ELEVATION AND DISCHARGE DATA
Upper Lefthand Creek 80ulder County, Colorado

Di stance Stream 1/ 10-Year 50-Year 100-Year 500-Year
Reference From Bed Flood Peak Flood Peak Flood Peak Flood Peak
Point Mouth Elevation Elevation Discharge ~ Elevation Discharge ~ Elevation Discharge ~ Elevation Di scharge ~
Number Ft. Identification Ft. -m. s.l. Ft.-m.s.l. c.f.s. Ft.-m.s.l. c.f.s. Ft.-m.s.l. c.f.s. Ft.-m.s.l. c.f.s.
186 900+40 6073.7 6076.6 6078.9 6080.3 6083.1
187 904+80 6081.7 6085.7 6088.2 6089.8 6093.1
188 909+50 6093.0 6095.3 6097.1 6098.5 6101.6
189 915+14 6103.4 6106.6 6108.3 6109.3 6111.8
190 920+96 6116.3 6119.3 6121.8 6123.6 6128.1
191 928+31 6133.0 6136.3 6138.8 6140.5 6143.7
192 934+05 6144.5 6148.4 6151. 0 6152.8 6157.6
193 942+18 6168.5 6171.2 6173.4 6175.1 6177 . 9
194 948+40 6185.0 6188.8 6191. 5 6193.2 6199.0
195 954+97 6205.0 6207.5 6209.6 6211. 2 6213.9
196 959+47 6217.7 6221. 6 6224.7 6227.3 6232.9
197 962+96 6235.0 6238.0 6241. 0 6243.1 6247.8
198 969+65 6263.1 6265.8 6268.1 6269.9 6274.8
199 976+90 6287.0 6290.3 6293.1 6295.2 6297.5
200 980+37 6297.2 6301.4 6304.4 6306.4 6312.9
201 986+52 6315.0 6318.7 6321. 3 6323.2 ' 6326.7
202 991+03 6325.1 6329.1 6332.0 6333.9 6337.3
l! Low water elevation as determined by aerial photogrammetric methods.
~ Discharges are prorated between stations.

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