Floodplain Information Report Volume 4 Colorado River Mainstem from Rifle to the Utah Stateline

• Basin: Colorado Mainstem
• Title: Floodplain Information Report Volume 4 Colorado River Mainstem from Rifle to the Utah Stateline
• Date: 3/1/1995
• Prepared For: The Recovery Implementaiton Program for Endangered Fish Species in the Upper Colorado River Basin
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE 6
COLORADO RIVER FLOOD DEPTH SUMMARY
' WIDTH AT CROSS - SECTION; ACTUAL WIDTH VARIES BETWEEN CROSS - SECTIONS WITHIN EACH REACH.
2 CANYON REACH DEPTHS NOT INCLUDED, AS DESCRIBED IN SECTION 4.3.
3 FLOOD DEPTH INITIALLY COMPUTED FROM TOP OF WATER DURING LOW FLOW PERIOD (1/95); VALUE SHOWN INCLUDES 3'
ADDED AS AN AVERAGE DEPTH FROM LOW WATER TO THE CHANNEL BOTTOM.
4 4' ADDED AS AN AVERAGE DEPTH FROM LOW WATER TO THE CHANNEL BOTTOM.
I~LOOD DEPTHS (FT)
FLOODPLAIN WIDTHS AT! CROSS
REACH #
CROSS: SECTION
MILE
.
;;
SECTIONSi;I
5U YEA.R
100 -YEAR
SO YEAR
X.
f 00 YEAR
1 - 4
DETAILED STUDY
(93 -57)
SEE COE STUDY
SEE COE STUDY
SEE COE STUDY
SEE COE STUDY
5
CANYON
(57 -50)
2
2
z
z
6
A -A'
49.5
17.883
18.24,
1450'
1470'
7
CANYON /DETAILED
(47.5 -45)
2
2
2
z
STUDY
8 - 9
DETAILED STUDY
(44 -17)
SEE FEMA
SEE FEMA
SEE FEMA
SEE FEMA
10
CANYON
(17 -12.5)
2
2
z
2
11
B -B'
12
20.384
21.26
855'
865'
12
C -C'
1.5
24.884
26.55
390'
430'
' WIDTH AT CROSS - SECTION; ACTUAL WIDTH VARIES BETWEEN CROSS - SECTIONS WITHIN EACH REACH.
2 CANYON REACH DEPTHS NOT INCLUDED, AS DESCRIBED IN SECTION 4.3.
3 FLOOD DEPTH INITIALLY COMPUTED FROM TOP OF WATER DURING LOW FLOW PERIOD (1/95); VALUE SHOWN INCLUDES 3'
ADDED AS AN AVERAGE DEPTH FROM LOW WATER TO THE CHANNEL BOTTOM.
4 4' ADDED AS AN AVERAGE DEPTH FROM LOW WATER TO THE CHANNEL BOTTOM.