FLOOD11770

• County: Douglas
• Community: Douglas County
• Stream Name: Fourmile, Horse, West, Trout Creeks
• Basin: South Platte
• Title: Draft South Platte River Tributaries Hydrology Report
• Date: 5/11/2004
• Prepared For: Douglas County
• Prepared By: Moser and Associates
• Floodplain - Doc Type: Floodplain Report/Masterplan

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DRAFT SOUTH PLATTE RIVER TRIBUTARIES HYDROLOGY REPORT

FOUR MILE CREEK, HORSE CREEK, WEST CREEK, AND TROUT CREEK

represent the long-term hydrologic condition within the Hayman fire area. Appendix B
contains both sub-basin information that was developed as part of this study and
information that was developed and provided by the USGS.

Table 3
Long-Term Sub-Basin Characteristics

SUB-BASIN CONTRIBUTING RUNOFF INITIAL
IDENTIFIER DRAINAGE AREA CURVE NUMBER" ABSTRACTION. LAG TIME*
(m~) (in) (mln)
4-MIlLE CREEK
FB1 0.95 69.60 0.87 U3.50
FB2 1.75 70.40 0.84 149.60
FB3 5.65 71.70 0.79 276.90
8.35
HORSE CREEK
HB1 6.06 64.10 1.12 371.50
HB2 3.66 71.30 0.81 220.40
I 214.08
WEST CREEK
WB1 9.23 68.50 0.92 221.80
WB2 4.00 68.00 0.94 130.30
WB3 1.67 66.10 1.03 ~18.60
WB4 10.45 68.50 0.92 316.20
WB5 9.28 67.00 0.99 217.30
WB6 4.62 66.80 0.99 134.80
WB7 4.32 69.50 0.88 2101.70
was 8.39 60.30 1.32 367.80
WB9 4.78 64.80 1.09 247.40
WB10 6.13 58.00 1.45 2'75.30
WB11 6.45 58.30 1.43 279.70
BASIN AREA 69.32
TROUT CREEK
TB1 9.39 58.20 1.44 189.70
TB2 4.82 58.60 1.41 1l:J4.30
TB3 10.50 59.20 1.38 2'79.40
TB4 7.05 64.10 1.12 282.70
TB5 9.55 59.60 1.35 311.90
TB6 9.08 58.20 1.44 268.10
TB7 6.71 59.00 1.39 304.80
TB8 7.38 56.70 1.53 158.50
TB9 6.08 56.60 1.53 136.80
TB10 6.97 57.50 1.48 191.30
TB11 10.74 57.50 1.48 224.90
TB12 7.95 57.90 1.45 295.40
TB13 6.15 58.30 1.43 209.40
TB14 7.19 57.30 1.49 203.60
TB15 2.45 58.90 1.40 213.40
TB16 8.82 59.20 1.38 325.00
TB17 8.14 58.40 1.43 247.50
TB18 6.07 58.90 1.39 267.00
BASIN AREA 135.04

. Runoff CUlVe Number, Initial Abstraction. ,and Lag Times provided by the USGS.

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