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

I
I TABLE 4
I PEAK DISCHARGE AND WATER SURFACE ELEVATION DATA
Fourmile Creek
I Distance II 10-Year 50-Year 100-Year 500-Year
Stream-
Reference From Bed Flood Peak Flood Peak Flood Peak Flood Peak 21
I Point Mouth Elevation Elevation Discharg~ Elevation Discharg~ Elevation Discharg~Elevation Discharge=
Identification Number Ft. Ft.-m.s.1. Ft.-m. s.1. c.f.s. Ft.-m. s.1. c.f.s. Ft.-moos.l. c.f.s. Ft.-moos.l. coof.s.
I Upstream Limit
1 571+50 7736.6 7740.2 490 7741. 0 1320 7741. 4 1850 7742.5 3700
2 567+70 7718.2 7721. 5 7723.6 7724.3 7726.2
County Road 3 567+35 7716.0 u/s 7721. 5 u/s 7723.6 u/S 7724.3 u/s 7726.2
I 95J D/s 7719.8 D/s 7721.4 D/s 7722.2 D/s 7724.1
Pennsylvania 565+50 7710.0 u/s 490 1320 1850 3700
and Routt Gulches D/s 520 1780 2510 4750
I 4 563+00 7700.3 7703.6 7706. 3 7707.2 7709.6
5 557+"75 7677.2 7681. 7 7683.4 7684.0 7685.2
6 552+75 7660.4 7662.8 7664.0 7664.5 7665.8
I 7 547+50 7639.9 7643.0 7644.6 7645.2 7646.6 .
8 541+30 7621.1 7623.8 7625.4 7626.0 7628.0
Bear Gulch 536+00 7600.0 u/s 580 2020 2860 5420
D/s 670 2310 3270 6160
I 9 535+75 7598.5 7602.6 7605.2 7606.4 7608.6
10 531+60 7585.3 7589.1 7590.5 7590.9 7592.2
11 526+65 7567.9 7570.9 7573.5 7574.2 7575.9
I 12 521+85 7552.8 7557.4 7559.1 7560.0 7561. 6
13 517+70 7540.7 7544.2 7545.9 7546.5 7548.0
Private Drive 13.5 516+40 7536.5 u/s 7542.2 u/s 7543.9 u/s 7544.7 u/s 7546.7
I D/s 7539.1 D/s 7541. 5 D/s 7542.0 D/s 7543.3
14 512+10 7522.5 7526.2 7528.3 7528.8 7530.5
Private Drive 15 511+70 7521. 0 u/s 7526.2 u/s 7528.3 u/s 7528.8 u/s 7530.5
D/s 7524.2 D/s 7525.5 D/s 7526.1 D/s 7527.2
I 16 507+20 7504.2 7508.5 7509.9 7510.5 7511. 9
17 502+65 7490.1 7493.6 7495.4 7496.2 7497.8
18 498+35 7478.3 7481.0 7483.0 7483.9 7486.1
I 19 493+95 7462.1 7467.0 7469.7 7470.6 7472.5
20 489+95 7446.8 7450.7 7454.1 7455.2 7457.1
21 485+50 7432.9 7435.7 7437.6 7438.4 7440.0
22 481+15 7417.7 7422.4 7424.9 7425.6 7427.5
I 23 476+65 7403.4 7407.5 7410.4 7411.5 7413.5
24 472+75 7391. 9 7396.2 7397.7 7398.2 7399.8
25 468+35 7375.7 7380. 3 7383.0 7384.0 7386.3
I Private Drive 25.5 467+25 7372.1 u/s 7380.0 u/s 7382.6 u/s 7383.6 u/s 7385.8
D/s 7375.4 D/s 7377.8 D/s 7378.8 D/s 7381.2
26 464+00 7363.2 7366.6 7369.5 7370.5 7372.7
I 27 459+65 7349.6 7354.0 7356.9 7358.2 7360.7
28 454+95 7332.7 7337.2 7341. 5 7342.8 7345.6
29 449+60 7316.1 7322.0 7324.5 7325.7 7327.7
30 444+85 7301. 0 7305.7 790 7309.8 2670 7310.8 3750 7313.4 7060
I 11 Low Water elevation as determined by aerial photogrammetric methods.
I gj Discharges are prorated between stations.
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