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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E.G. slope (ft/ft)
Q Total (cfs)
Tap Wi dth (ft) ,
vel ToU 1 (ft/s)
Max ch 1 opth (ft)
Conv. Total (cfs)
Length wtd. (ft)
Min Ch El (ft)
Alpha
Fret" la.55 (ft)
C '" E Loss (ft)

0.010071
2515.00
65.66
9.89
4.56
25061.1
588.91
7908.15
1.23
5.98
0.05

Area (Sl! ft)
Flow (cfs)
TOp Width (ft)
AVS' vel. (ft/s~

~n~: ~~~~~ (ft

wetted Per. (ftl
shear (lb/sl! ft
Stream Power (lIft s)
Cum vohl1le (acre-ft)
Cum SA (acres)

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20.97
81.85
9.74
3.90
2.15
815.6
10.65
1.24
4.83
46.89
26.53

1~ZllalRive39~~~

2234.29 198.85
43.72 12.20
11.51 5.06
4.44 3.22
22263.9 1981.5
43.72 13.52
2.79 1.83
32.13 9.25
76.75 49.32
18.49 27.42

warning: The energy 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.

CROSS SECTION

coeff Contr. Expan.
.1 .3

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RIVER: Crystal
REACH: Marble

RS: 16883

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INPUT
Description:
Station Elevation Data nurn=
Sta Elev 5ta Elev
07932.77 .35 7932.58
18.89 7923.21 27.02 7919.39
54.82 7906.52 57.94 7906
80.887902.41 96.67902.43
132.09 7904.62 138.12 7905.45
157.72 7914.22 158.27 7914.47
173.14 7918.46 184.63 7918.98
210.9 7919.6 214.337919.71
257.17920.54 261.67920.64
296.55 7922.62 302.81 7923.09
322.77 7924.29 331.5 7924.55
357.72 7925.91 363.567926.22
383.81 7927.8 384.72 7927.86
404.06 7929.12 410.15 7929.44
436.37 7930.48 444.56 7931. 52
454.697932.77 455.75 7932.89

5ta Elev
3.47 7930.98
40.16 7913.36
79.56 7902.58
121.86 7902.83
142.77907.34
163.65 7916.97
197.76 7919.42
242.06 7920.25
279.07 7921.62
312.93 7923.4
343.31 7925.12
373.69 7927.01
393.94 7928.46
424.31 7930.05
448.53 7932.01

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Rum-
n val
.035

78
5ta E1 ev
2 7931.77
34.32 7916.05
66.42 7904.57
120.65 7902.6
138.98 7905.63
163.01 7916.67
188.57 7919.12
221.81 7919.71
270.33 7921.12
305.29 7923 .17
340.24 7925.06
366.46 7926.44
392.67 7928.37
414.19 7929.55
445.1 7931.6
455.99 7932.92

3
5ta n val
120.65 .06

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Manning' 5 n values
5ta n val 5ta
o .06 80.88

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Bank 5ta: Left:. Right
80.88 120.65

Lengths: Left channel Right
535.61 475.86 425.77

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CROSS SECTION OUTPUT

~er' H:~~v (m)

W.S. Elev (ft)
cri't W.S. eft)
E.G. slope (ft/ft)
Q Total (cfs)
Top width (ft)
vel Total (ft/s)
Max ch 1 Dpth (ft)
Conv. Total (cfs)
Length wtd. (ft)
Mi n ch El (ft)
Alpha
Frctn Loss (ft)
C &, E Loss (ft)

Profile 'lOO-year

7908.09 Element
1.59 wt. n-Val.
7906.50 Reach Len. (ft)
7906. 50 Flow Area (sq ft)
0.010621 Area (sq ft)
2181.00 Flow (cfs)
85.92 Top width (ft)
8.44 Avg. vel. (ft/s)
4.09 Hydr. Depth (ft)
21163.3 Conv. (cfs)
476.20 wetted Per. (ft~
7902.41 shear (1 b/sq ft
1. 44 Stream Power (lIft s)
5.14 Cum volume (acre-ft)
0.03 Cum SA (acres)

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warni ng:
warni ng:

The energ~ 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.
curing the standard step iterations. when the assumed water surface was set '!4Jual to critical
depth, the calculated water surface ciUlIe back below critical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Profile 'Floodway
~er' H:~~v (m) 7908.09 Element Left DB channel oi t~6g8
1. 59 wt. n-val. 0.060 0.035
~~~t ~~~~ ~m 7906.50 Reach Len. (ft) 535.61 475.86 425.77
7906.50 Flow Area (sq ft) 54.74 159.91 43.71
E.G. Slope (ft/ft) 0.010621 :~~: J~Mt) 54.74 159.91 43.71
Q Total (cts) 2181. 00 228.02 1769.15 183.83
~~~ ~~~~ fms) 85.92 Tap dth (ft) 25.93 39.77 20.22
8.44 AVS' vel. (ftjs~ 4.17 11.06 4.21
Max ch 1 Dpth (ft) 4.09 Hy r. Depth (ft 2.11 4.02 2.16
Conv. Total fcfs) 21163.3 Conv. (cfs) 2212.6 17166.9 1783.8
Length wtd. ft) 476.20 wetted Per. (ft~ 26.25 39.77 20.66
Mi n ch .1 (ft) 7902.41 shear (l b/sq ft 1.38 2.67 1.40
Alpha 1.44 Stream Power (11ft 5) 5.76 29.49 5.90
Frctn Loss (ft) 5.14 Cum volume (acre-ft) 18.47 74.76 13.56
C &, E Loss (ft) 0.03 Cum SA (acres) 7.15 17.93 5.85

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Left OB
0.060
535.61
54.74
54.74
228.02
25.93
4.17
2.11
2212.6
26.25
1.38
5.76
39.27
22.58

Sta Elev
13.897925.51
54.42 7906.71
80.23 7902.49
126.87 7903.65
145.23 7908.44
171.38 7918.29
203.99 7919.39
252.18 7920.45
282.56 7921.76
320.91 7924.11
353.43 7925.66
375.2 7927.1
401.41 7928.94
434.44 7930.42
453.84 7932.67

Channel
0.035
475.86
159.91
159.91
1769.15
39.77
11.06
4.02
17166.9
39.77
2.67
29.49
68.33
17.93

oi 8~~6g8

425.77
43.71
43.71
183.83
20.22
4.21
2.16
1783.8
20.66
1.40
5.90
40.52
24.05

warning: i~~s e~:;grn~~~:t:~h~r~::~r f~~a~dai~i:~afOc~o;~' s~~~~~~. the current and previous cross section.
warning: During the standard step iterations. when the assumed water surface was set equal 'to critical
depth. the calculated water surface ciUlIe back below critical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Profi 1 e S10-year
~er' H:~~v (m) 7907.28 E1 ement Left 08 Channel oi 8~~6g8
1. 37 wt. n-Va l. 0.060 0.035
w.s. Elev ~ft) 7905.91 Reach Len. (ft) 535.61 475.86 425.77
crit w.s. ft) 7905.91 Flow Area (sq ft) 40.52 136.51 32.19
E.G. Slope (ft/ft) 0.011015 Area fS? ft) 40.52 136.51 32.19
Q Total (cfs) 1657.00 Flow c 5) 155.07 1384.08 117.85
TO~ Width ~ft) 81.12 Tap Wi dth ~ ft) 22.41 39.77 18.94
Ve Total ft/s) 7.92 AVS' vel. ft/s) 3.83 10.14 3.66
Max chl Dpth (ft~ 3.50 ~~n~: ~~~~~ (ft) 1.81 3.43 1.70
Conv. Tota 1 (cfs 15788.4 1477.6 13187.9 1122.9
Length wtd. (ft) 476.27 Wetted Per. (ft~ 22.68 39.77 19.25
Min ch El (ft) 7902. 41 shear (1 bjsq ft 1.23 2.36 1.15
Alpha 1.41 Stream Power (lb/ft s) 4.70 23.93 4.21
Frctn LOSS (ft) 5.40 Cum volume (acre-ft) 29.80 58.69 28.50
c '" E Loss (ft) 0.03 Cum SA (acres) 19.74 17.93 19.68

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Warn; n9:

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The energy equation could not be balanced within the specified number of iterations. The
program selected the water surface that had the least amount of error between computed and
assumed values.
:::~~ 5 e~:;gf n~~~:t:a~h~ r~:~~r f~~a~d~i ~i ~a fO c~o:~ . s~~~~~. the current and previ OUS cross secti on.
~~~~~! ~~: ~~f~~V:~e~t:~t~~e~~~}:~:. c::nb;~: ~~:e~r1:i~:lS~~:~~~ ~i:efn~~:~e~O t~:~t~~:~e is
not a valid subcritical answer. The program defaulted to critical depth. _
CROSS SECTION OUTPUT Profile '50-year

warni ng:

warning:

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