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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TABLE 6 (Continued)

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

Distance Stream 1/ lO-Year 50-Year 100-Year 500-Year
Reference From Bed Flood Peak Flood Peak Flood Peak Flood Peak
Point Mouth E1 evati on Elevation Discharge 2/ Elevation Discharge 11 Elevation Discharge 11 Elevation Di scharge 11
Number Ft. Identification Ft.-m.s.1. Ft.-m.s.1. c.f.s. - Ft.-m.s.1. c. f.s. Ft.-m.s.1. c. f.s. Ft.-m.s.1. c.f.s.
1256+00 Lick Skillet d/s 410 1860 3280 9360
Gulch (Co.Rd.89) u/s 400 1800 3180 9060
314 1257+88 7487.2 7489.8 7492.2 7493.5 7496.8
314.1 1261+50 7494.8 7497.5 7500.3 7501. 6 7504.3
315 1261+58 Lick Skillet 7495.0 d/s 7497.5 7500.3 7501. 6 7504.3
Road u/s 7499.5 7501. 2 7502.4 7506.5
316 1261. 97 7495.4 7499.5 7501.2 7502.4 7505.5
317 1265+85 7507.1 7509.5 7512.0 7513.4 7516.6
1271 +00 Left Bank d/s 400 1800 3180 9060
Tri butary u/s 390 1750 3090 8790
318 1271+58 7525.2 7527.7 7530.2 7531. 5 7536.0
319 1276+00 7536.3 7538.9 7541.1 7542.6 7546.8
1277+20 Spring Gulch d/s 390 1750 3090 8790
u/s 260 1950 3370 8470
320 1279+90 7549.0 7550.5 7552.0 7552.7 7554.7
321 1285+00 7563.4 7564.5 7566.1 7566.9 7568.6
321.1 1291+59 7582.9 7584.3 7585.8 7586.5 7588.3
1/ Low water elevation as determined by aerial photogrammetric methods.
11 Di scharges are prorated between stations.

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