FLOOD10363 ‎(2)‎

• County: Gunnison
• Community: Gunnison County
• Stream Name: East River, Cement Creek, Alkali Creek, Ohio Creek
• Title: Gunnison County Flood Hydrology, Contract # W99-D-0018 Final Report
• Date: 11/1/2004
• Prepared For: US Army Corps of Engineers, CWCB and Gunnison County
• Prepared By: Tetra Tech, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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10000
9000
8000
7000
6000
J!2
0 5000
of
~
'"
.c
&l 4000
is
3000

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1000

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PEAK
1-DAY
3-DAY
5-DAY
7-DAY
15-DAY
30-DAY
60-DA Y

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Figure 5.8.3.1 Reach 9 - Flood Frequency Analysis Results

20000

2000

95

90

80

70 60 50 40 30 20 10
Exceedence Probability

5

2

0.5 0.2

ADOPTED STATISTICS:

Mean Std. Dev. Skew
3.630 0.16 0.0
3.601 0.16 0.0
3.583 0.16 0.0
3.569 0.16 0.0
3.556 0.16 0.0
3.508 0.16 -0.1
3.452 0.16 -0.1
3.362 0.17 -0.1

GUNNISON COUNTY FLOOD HYDROLOGY
GUNNISON RIVER AT GUNNISON RIVER

Noles:
1. Median Plotting Positions Based on
Extended Period of Record
2. Observed Period of Record: 1959-2000.
3. Equivalent Years of Record ~ 64 yrs
by correlation with tributary
4. Drainage area: 1012 sq. mi.

SNOWMELT FLOW FREQUENCY CURVE
REACH 9
U.S. ARMY CORPS OF ENGINEERS
SACRAMENTO DISTRICT

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