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 ANn WATER SURFACE ELEVATION nATA
FourJDi.1e Creek
I nistance Stream!! lo-Year 50-Year 100-Year 500-Year
Reference From Bed Flood Peak 2 Flood Peak 2 Flood Peak 2 Flood Peak 21
Point Mouth Elevation Elevation DisCharge-! Elevation nisCharge-!Elevation nischarge-!Elevation Discharge--
I Identification Number !"t. Ft.-m. s.1. Ft.-m.a.l. c.r.s. Ft.-m.s.1. c.r.s. Ft.-m.a.l. c.f.s. Ft.-m.a.l. c.f.s.
Private Drive 60.2 323+20 6829.5 u/s 6837.4 990 u/s 6839.5 3370 u/s 6840.3 4720 u/s 6842.4 8850
I n/s 6831. 6 n/s 6834.7 n/s 6835.5 n/s 6837.3
61 321+40 6822.8 6830.3 6832.8 6833.7 6835.7
Private Drive 62 321+10 6820.8 u/s 6830.3 u/s 6832.8 u/s 6833.7 u/s 6835.7
I n/s 6823.7 n/s 6826.8 n/s 6827.6 n/s 6829.4
Private Drive 63 318+70 6813.3 u/s 6819.7 u/s 6821. 5 u/s 6822.1 u/s 6823.8
n/s 6816.1 n/s 6818.2 n/s 6819.1 n/s 6820.7
64 318+20 6811.4 6816.1 6818.2 6819.1 6820.7
I 65 314+10 6798.8 6802.6 6804.4 6805.1 6806.9
66 309+35 6784.4 6788.5 6790.5 6791.1 6792.7
67 305+50 6774.5 6777.3 6778.6 6779.2 6780.8
I Private Drive 68 302+55 6761. 7 u/s 6770.7 u/s 6772.6 u/s 6773.3 u/s 6775.1
n/s 6766.3 n/s 6769.5 n/s 6770.1 n/s 6771. 6
69 302+30 6760.5 6766.3 6769.5 6770.1 6771. 6
I 70 297+70 6747.2 6751. 0 6753.0 6753.7 6755.3
71 294+00 6735.7 6742.9 6745.2 6746.1 6748.3
Private Drive 72 293+70 6734.4 u/s 6742.9 u/s 6745.2 u/s 6746.1 u/s 6748.3
n/s 6737.7 n/s 6739.9 n/s 6740.7 n/s 6742.6
I 73 287+25 6718.0 6721.1 6723.3 6724.3 6726.6
74 282+30 6701. 5 6706.3 6708.7 6709.7 6711. 9
75 276+15 6683.7 6689.3 6692.4 6693.9 6696.9
I 76 271+00 6668.6 6672.9 6676.1 6677.3 6680.1
77 268+30 6658.9 6667.0 6669.8 6671. 2 6674.1
Footbridge 78 268+05 6657.8 U/s 6667.0 u/s 6669.8 u/s 6671.2 u/s 6674.1
I n/s 6662.4 n/s 6665.5 n/s 6666.7 n/s 6668.8
Private Drive 78.5 265+65 6645.2 u/s 6656.4 u/s 6659.5 u/s 6660.9 u/s 6664.4
n/s 6649.9 n/s 6652.8 D/s 6653.9 n/s 6656.6
79 263+95 6636.4 6641. 8 6645.3 6646.4 6649.2
I Private Drive 80 261+15 6624.0 u/s 6632.9 u/s 6635.8 u/s 6636.9 u/s 6639.9
D/s 6628.6 n/s 6631. 6 D/s 6632.6 D/s 6634.5
81 260+90 6623.2 6628.6 6631. 6 6632.6 6634.5
I 82 256+50 6603.7 6609.1 6612.1 6613.3 6616.3
83 252+70 6593.3 6599.2 6602.6 6604.1 6607.3
Gold Run 249+30 6582.0 u/s 1020 3460 4870 9110
n/s 1190 3950 5570 10430
I 84 248+20 6578.7 6584.5 6588.9 6590.4 6593.5
85 243+80 6558.1 6565.9 6570.1 6571. 5 6575.0
86 239+65 6537.0 6543.4 6548.7 6549.9 6552.6
I 87 235+65 6514.3 6519.5 6521. 8 6523.0 6525.9
88 230+00 6485.2 6490.3 1210 6494.1 3990 6495.4 5630 6498.3 10530
I 11 Low water elevation as determined bw aerial photogrammetric methods.
g; Discharges are prorated between stations.
I .17