FLOOD10515

• County: Gunnison
• Community: Marble and Vicinity
• Stream Name: Crystal River
• Basin: Gunnison
• Title: Floodplain Information Report Crystal River - Technical Appendix
• Date: 5/1/2004
• Prepared For: Marble and CWCB
• Prepared By: ICON Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Manning's n values
Sta n val Sta
o .06 153.7

nUnl=
n val
.035

587.92 7950.63
610.16 7952.61
3
Sta n val
175.8 .06

595.67 7951.3 597.92 795~1~talRiver.rep
614.16 7952.88

577.92 7949.91 585.67 7950.47
605.67 7952.18 607.92 7952.41

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Bank Sta: 1~~:~ ~~~~~

Ineffective Flow "um=
Sta L Sta R Elev
o 132.1 7936.2
187.4 614.16 7935.88

Lengths: Left Channel
34.24 35.06

Right
34.99

coeff Contr.
.3

Expan .
.5

2
Permanent
T
T

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CROSS SECTION OUTPUT Prof; 1 e IIOO-year
~;, y' H;~aV (~g> 7930.89 E1 ement Left 08 Channel Ri 8~~6gB
1.70 Wt. "-val. 0.060 0.035
W.~. Elev ~ft~ 7929.19 Reach Len. (ft) 5.25 5.25 5.25
Crlt W.S. ft 7927.89 Flow Area (sq ft.) 42.89 173.07 35.13
E.G. Slope (ft/ft) 0.004585 ~~:: ~~?s~t) 42.89 173.07 35.13
Q Total (cfs) 2181.00 145.77 1919.25 115.98
TO~ width ~ft) 46.51 Top width ~ft) 13.42 . 22.10 10.99
Ve Total ft/s) 8.69 A~. Vel. ft/s~ 3.40 11.09 3.30
Max chl Dpth (ft~ 9.27 Hy r. Depth (ft 3.20 7.83 3.20
Conv. Total ~Cfs 32208.2 Conv. (cfs) 2152.6 28342.8 17U.8
Length wtd. ft) 5.25 wetted Per. (fti 14.87 22.84 U.72
Mi n ch El (ft) 7919.92 Shear (lb/sq ft 0.83 2.17 0.79
Alpha 1.45 Stream Power (lIft s) 2.81 24.05 2.61
Fretn loss ~ft~ 0.03 Cum volume (acre-ft) 40.45 74.53 42.09
C&EloSS ft 0.28 Cum SA (acres) 23.19 19.31 24.62

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Warning: The velocity head has changed by more than 0.5 ft (0.15 m). Thh may indicate the need for
additional cross sections.
CROSS SECTION OUTPUT Profile #Floodway

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~;,y' H;~av (~g>

W.S. Elev (ft)
cdt w.s. (ft)
E.G. Slope (ft/ft)
Q Total (cfs)
Top width (ft)
vel Total (ft/s)
Max chl Dpth (ft)
COny. Total (cfs)
Length wed. (ft)
Min ch El (ft)
Alpha
Fretn Loss (ft)
C &. E LOSS (ft)

7930.89
1.70
7929.19
7927.89
0.004585
2181.00
46.51
8.69
9.27
32208.2
5.25
7919.92
1.45
0.03
0.28

E1 ement
Wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)
~~~: f~Mt)

TOp W1 dth (ft)
AVS' vel. (ft/s~

~~n~: ~~~~~ (ft

wetted Per. (ft~
Shear (lb/sq ft
Stream Power (lIft s)
Cum vollUlle (acre-ft)
Cum SA (acres)

Left 08
0.060
5~25
42.89
42.89
145.77
13.42
3.40
3.20
2152.6
14.B7
0.83
2.81
19.64
7.76

channel
0.035
5.25
173.07
173.07
1919.25
22.10
11.09
7.83
28342.8
22.84
2.17
24.05
80.96
19.31

Ri 8~~6gB

5.25
35.13
35.13
115.98
10.99
3.30
3.20
17U.8
U.72
0.79
2.61
15.13
6.42

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warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections.

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CROSS SECTION OUTPUT Prof; 1 e #10-year
~;,y' H;~av (m) 7929. SO Element Left 08 Channel Ri8~~6gB
1.47 wt. n-val. 0.060 0.035
w.S. Elev (ft~ 7928.03 Reach Len. (ft) 5.25 5.25 5.25
cdt w.s. (ft 7926.87 Flow Area (sq ft) 28.76 147.49 23.56
E.G. Slope (ft/ft) 0.004774 :1:: ~~'sjt} 28.76 147.49 23.56
Q Total (cfs) 1657.00 87.31 1500. 21 69.47
TO~ wi dth ~ ft) 42.09 TOp wi dth ~ft) 10.99 22.10 9.00
Ve Total ft/s) 8.29 AVS' vel. ft/s~ 3.04 10.17 2.95
Max Chl Dpth (ft~ 8.11 Hy r. Depth (ft 2.62 6.67 2.62
Conv. Tota 1 ~cfs 23981.1 Conv. (cfs) U63.6 217U.0 1005.5
Len9th wed. ft) 5.25 Wetted Per. Cftl U.17 22.84 10.41
Min ch El (ft) 7919.92 shear (lb/sq ft 0.70 1.92 0.67
Alpha 1.37 Stream Power (11ft $) 2.14 19.57 1.99
Fretn Loss (ft~ 0.03 Cum Volume (acre-ft) 30.64 63.98 29.69
C&ELOSS (ft 0.25 Cum SA (acres) 20.17 19.31 20.21

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Warning: The velocity head has changed by more than 0.5 ft (O.lS II). This may indicate the need for
additional cross sections.
Warn; "g: The. .conveyance ratio (upstream conveyance divided by downstream conveyance) is less than
0.7 or greater than 1.4. This may indicate the neei::l for additional cross sections.

CROSS SECTION OUTPUT Profi le ISO-year

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~;,i' H;~av (~g> 7930.50 E1 ement Left OB Channel Ri8~~~B
1.65 Wt. n-val. 0.060 0.035
W.S. Elev (ft) 7928.85 Reach Len. (ft) 5.25 5.25 5.25
cdt w.s. (ft) 7927.61 Flow Area (sq ft) 38.42 165.50 31.47
E.G. slope (ft/ft) 0.004693 Area ~s~ ft) 38.42 165.50 31.47
Q Total (cfs) 2031.00 Flow c 5) U7.34 1802.34 101.32
~~~ ~~~~ ~mS) 45.21 TOp wi dth (ft) U.70 22.10 10.40
8.63 AVS' vel. (ft/s~ 3.31 10.89 3.22
Max Ch 1 Dpth (ft~ 8.93 Hy r. Depth (ft 3.02 7.49 3.02
Conv. Tota 1 ~cfs 29646.0 Conv. (cfs) 1858.7 26308.3 1479.0
Length wed. ft) 5.25 Wetted Per. (ft~ 14.07 22.84 U.03
Min ch El (ft) 7919. 92 Shear (lb/sq ft 0.80 2.U 0.77
Alpha 1.43 Stream Power (lb/ft s) 2.65 23.U 2.47
Frctn Loss ~m 0.03 Cum volume (acre-ft) 37.51 71.63 38.32
C &- E Loss 0.26 Cum SA (acres) 22.25 19.31 23.62
Warning: The velocity head has changed by more than 0.5 ft (O.lS m). This may indicate the need for
additional cross sections.
CROSS SECTION OUTPUT Profile #SOO-year
~;,y' H~~av (m) 7931. 69 E1 ement Left OB channel R;8~~6gs
1.82 wt. n-Val. 0.060 0.035
W.~. E1ev ~ft~ 7929.87 Reach Len. (ft) 5.25 5.25 5.25
Crlt W.S. ft 7928.49 Flow Area (sq ft) 52.53 188.13 42.93
E.G. slope (ft/ft) 0.004450 ~~~: ~~Mt) 52.53 1B8.13 43.02
Q Total (cfs) 2515.00 188.15 2172.87 153.98
TO~ wi dth ~ft) 49.12 TOp width (ft) 14.B5 22.10 U.17
Ve Tota 1 f~/s) 8.87 AVS' vel. (ft/s~ 3.58 11.55 3.59
Max Ch 1 Dpth (ft~ 9.95 Hy r. Depth (ft 3.54 8.51 3.70
Conv.Total (cfs 37701.5 Conv. (cfs) 2820. 5 32572.7 2308.3
Length wtd. (ft) 5.25 wetted Per. (ft~ 16.45 22.84 13.42
Min ch El (ft) 7919.92 shear (lb/sq ft 0.89 2.29 0.89
Alpha 1.49 Stream Power (lb/ft s) 3.18 26.43 3.19
Frctn Loss ~ft) 0.03 Cum volume (acre-ft) 47.84 80.97 50.47
C&ELoss ft) 0.30 Cum SA (acres) 27.08 19.31 27.77

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Warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections.

BRIDGE

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