FLOOD00150

• Designation Number: 579
• County: Gunnison
• Community: Marble and Vicinity
• Stream Name: Crystal River
• Title: Floodplain Information Report - Crystal River Technical Appendix
• Date: 8/1/2004
• Prepared For: CWCB
• Prepared By: Icon Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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'I

1303.13 7797.51304.197797.24 1305.65 7796.87 1306.58 7796.64 1314.79 779~~~~talRiver.rep
1317.547795.51324.797794.751330.877794.11548.13 7794.11549.53 7794.3
1554.797795.021>57.547795.421564.79 7796.461567.54 7796.921574.79 7798.37
1582.567799.991583.977800.34 1591.26 7801.521594.79 7802.081597.54 7802.45
1604.797110J.58 1612.77804.481613.887804.611623.027806.311624.797806.58
1627.667W7.0S"31.397W7.54U36.137W7.73H54.917B08.29H61.287W6.54
IGf.LS4 7B\Xi.2 1664.710 78%.83 1673.15 7810.27 1675.05 7811.02 1675.S8 7311.26
1681.52 78U.81684.79 7813.461687.54 7814.211694.79 7816.061697..\4 7816.75
1704.79 7818.61714.797820.821717.547821.271724.797822.881734.797824.91
1737.547825.631741.287827.021747.417828.96

1

Manning'snvalues
SU nVal Sta
o ,06784.68

1

num- 5
nval su
.051108.86

nVal su
.0351128.66

BankSta:Left Right Lengths: LeftChll,nnel Right
1108.861128.66 503.035.0.29498.09
Ineffective Flow nUm.. 2
Stll,L StaR Elev permanent
o 953.37800.09 F
1139.261747.417797.77 F

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CROSS SECTION OUTPUT
~e~' \1~~~v (~W
~~~t ~~~~ /n5
E.G. Slope (ft/ft)
o Toul (ds)
~~~ ~~~~ /nJS)
Max chl Dpth (ft)
Conv.Total (cfs)
Lengthloltd. (ft)
MinchEl (ft)
Alpha
FrctnLos5(ft)
C&ELOS5(ft)

1

1

\IIarning:
\IIarning:
IIOte:

Oivided flow computed for this cross~section.
The energl( 1055 was greater than 1.0 ft (O.l m). between the current and previous cross section.
This may lndicate the need for additional cross sections.
""'lti1='h crhical depths were fl>urul at this ll>cat'''n. The critical depth with the lowest, valid.
surface was used.

water

1

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I

warning:

warning:

warning:

1

loIaming:

NOte:

I

E.G. Elev(ft)
vel Head Cft)
W.S. Elev (ft)
critw.s. (ft)
E.G. slope (ft/ft)
QTotal (cfs)
~~~ *~~~~ HUs)
~~~v ~h~o~~fh (~~~~
L~ngth wtd. (ft)
MinChEl (ft)
Alpha
FrctnLoS5(ft)
C&ELoss(ft)

1

profile#100-year

7797.81
0.86
7796.95
7796.84
0.006947
2181.00
46l.48
5.59
4.86
.6167.9
510.55
7792.09
1.77
4.18
0.03

7797.30
0.85
7796. ~5
7796.45
0.007393
1657.00
~39.68
5.lO
~. J6
19270.7
7792.09
1.95

nval Sta
.D51S74.79

CoeffContr. Expan.
.1 .3

nval
.00

Element
Wt. n-val.
Reac:hLen. (ft)
FlowAru (sq ft)
Area (sqft)
Flow (cfs)
TOPWldth(ft)
Avg. vel. (ft/s)
Hydr.Oepth(ft)
conv. (cfs)
Wetted Per. (ftl
shear (lb/sq ft
Stream power el 1ft s)
Cum volume (acre-ft)
cu~ SA (acres)

Element
Wt. n-val.
Reach Len. Cft)
Flow Area (sqft)
~f~: ?~1!St)
TOp Width (ft)
~~g~. V~~Pt~f~m
conv. (cfs)
wetted Per. (ftl
shear (lbjsq ft
Stream powef (1 1ft 5)
Cum volume (acre-ft)
Cum SA (acres)

Leftoa
0.050
50l.03
270.76
27L48
1106.23
134.75
4.09
2.14
13272.7
127.81
0.92
3.75
23.10
14.25

LeftOa
0.050
503.03
207.83
208.04
7]9.14
127.80
3.S6
1.65
8,96.1
126.58
0.76
..70
16.35
11.86

Channel
0.03;
520..9
96.26
96.26
977.56
19.80
10.15
4.86
11728.9
19.80
2.11
21.~1
46.36
10.90

Channel
0.035
520.29
86.39
86.39
8~2.12
19.80
9.7S
~.l6
9793.7
19.80
2.01
19.63
19.65
10.90

Rig~~5gB
498.09
2LOS
749.84
97.21
308.93
~.22
2.52
1166.3
10.38
0.96
~.06
2~.19
14.39

water

Rig~~5gB
498.09
18.70
599.86
75. 7~
292.08
4.05
2.26
880.9
9.37
0.92
3.7]
15.78
11.85

1

warning:
warning:
Warning:
Note:

The ener9yequation could not be balanced within the specifiednu mber of iterations., The
prO(ilram used cntical depth for the water.surface and continued on with the calculatlcns.
Oivlded flow computed for this cross-sectlon.
The energl( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need for additional cross sections.
Mu1tip1e critical depths were found at this location. The critical depth with the "lowest, valid,
surface waS used.

CROSSSECTIONOUTPlIT Profile#Floodway
~~V'H:~dv(~W 7798.56 Element LeftOB Channel Ri&~~5gB
1.52 Wt. n-val. 0.050 O.OlS
W.5. Elev (ft) 7797.04 Reach Len. (ft) 503.03 520.29 ~98.09
Cr1't W.5. (ft) 7797 .O~ Flow Area (sq ft) 146.25 98.09 23.91
E.G. slope (ft/ft) 0.009877 ~f~: ?~1!srt) 1~6.25 98.09 2l.91
QTotal Cds) 2181.00 856.51 1202.79 121.70
~~~ ~~~~~ /n~5) 79.99 TOp Width (ft) SO.86 19.8(1 9.B
8.1] ~~g~. vg~Pt~ftm 5.86 12.26 5.09
Maxchl Opth (ft) 4.95 2.88 ~.9, 2.56
~~~~i:hT~~~~ mf 21944.9 Conv. (cfs) 8618.1 12102.l 1224.6
510.96 wetted Per. {ft~ 52.38 19.80 10.57
MinchEl (ft) 7792.09 5hear {lb/sq ft 1.72 3.05 1. ~O
Alpha 1.~8 Stream power (lIft s) 10.08 37.46 7.10
FrctnLOSS eft) 3.60 Cum Volume (acre-ft) 9.46 SO.06 9.56
C&EL05S eft) O,B cllI\s"-(acres) 3.70 10.90 3.M

The energy equation could not be balanced within the specified number of iterations. The
program used critical depth for the water surface and continued on with the calculations.
The velocity head has danged by more than 0.5 ft (0.15m). This may indfcate the need for
additional cross sections.
i~i s e~:;gl n~1~~t:a~h~r~:~dr f~~a~d~; ~i !~afO c~o~~' s~~~i~~~. the current and previous cross secti on.
ourin9 the standard step iterations, when the assumed water surface was set egual to critical
depth, the calculated water surface came back below critical depth. This indlCates that there is
~~f t~ pl: l~~i ~j~;li ~~~~~s a:~~:r fOU~~e a~r~~f:ml~~:~i~~~d i~e c~~~~i~~ 1 dd~~~ti wi th the lowest, va lid,
surface was used.
CROSS5EcnONOUTPlIT profileUO-year

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CR05S5Ec:nONOUTPlIT
E.G. Elev(ft)
Vel Head (ft)
~~~i: ~~~~ m~
E.G. slope (ft/ftl
QTotal Ccfs)
~~~ *~~~~ H~Js)
~~~v~h~o~~fh (~m
Lengthwtd. (ft)
MinchEl (ft)
Alpha
FrctnLoss(ft)
C&ELoss(ft)

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profileil'50-year

7797.67
0.89
7796.78
7796.72
O.0073~S
2031.00
455.71
5.59
~. 69
23698.9
110.78
7792.09
1.83
4.22
0.02

Element
wt.n-val.
Reach Len. Cft)
Flow Area (sq ft)
:1: ~~~~rt)
TOp Width (ft)
~~g~. V~~Pt~f~m
conv. Cefs)
Wetted Per. (ft)
~~~:~m (~~~~ H~/ft s)
Cum volume (acre-ft)
Cum SA (acres)

LeftOB
0.050
503.03
249.19
250.72
992.74
132.36
l.98
1.97
11583.9
127.37
0.90
3.57
21.10
13.63

Channel
0.035
S20.29
92.89
92.89
9~7 .14
19.80
10.20
~. 69
11051.8
19.80
2.15
21.93
~4. 54
lO.90

water

Rig~6sgB
~98.09
21.52
697.65
91.12
30l.55
4.23
2. ~3
1063.3
10.04
0.98
4.16
n.7l
13.97

Warning:
warning:
Note:

Divided flow computed for this cross~section.
The energl( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need for additional cross sections.
Multiple critical depths were fourld at this location. The critical depth with the lowest, valid, water
surfacewa,Sl.lsed.

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Pilge45