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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1000
900
800
700
600
J!l
c.> 500
cD
Cl
~
.c
c.> 400
(fJ
Ci

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100

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2000

Figure 5.6.3.1 Reach 7 - Flood Frequency Analysis Results

300

200

95

90

80

70 60 50 40 30 20 10
Exceedence Probability

5

PEAK
l,DAY
3-DAY
5-DAY
7-DAY
15-DAY
30-DA Y
60-DA Y

ADOPTED STATISTICS:
Mean Std. Dev.
2.753 0.18
2.691 0.18
2.665 0.19
2.642 0.19
2.629 0.19
2.572 0.19
2.506 0.20
2.431 0.20

Noles:
1. Median PioUing Positions Based on
Extended Period of Record.
2. Observed Period of Record: 1945-1950.
3. Equivalent Years of Record = 24 yrs
by correlation with tributary.
4. Drainage area: 167 sq. mi.

SNOWMELT FLOW FREQUENCY CURVE
REACH 7
U.S. ARMY CORPS OF ENGINEERS
SACRAMENTO DISTRICT

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Peak

1-DAY
3-DAY
5-DAY
7-DAY

. 15-DAY

2

0.5 0.2

GUNNISON COUNTY FLOOD HYDROLOGY
OHIO CREEK NEAR GUNNISON

Skew
-0.6
-0.6
-0.6
-0.6
-0.6
-0.7
-0.7
-0.7

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