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

Crystal River. rep
depth, the calculated water surface came back belOW critical depth. TIIis indicates that there is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Prof; 1 e 'lG-year

7901.81 Element
1.63 wt. n-val.
7900.19 Reach Len. (ft)
7900.19 Flow Area (sq ft)
0.011654 Area (sq ft)
1657.00 Flow ~cfs)
57.73 Tap Wldth (ft)
9.41 Avg. vel. (ft/s)
3.50 Hydr. Depth (ft)
15349.2 Conv. (cfs)
498.37 wetted Per. (ft~
7896.69 Shear (lb/sq ft
1.18 Stream Power (11ft s)
5.14 CUll volume (acre-ft)
0.02 Cum SA (acres)

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~e~' H;~~v (m)

W.~. Elev (ft)
Crlt W.S. (ft)
E.G. Slope (ft/ft)
Q Total (cfs)
Tap Wi dth (ft)
vel Total (ftls)
Max ch 1 Dpth (ft)
Conv. . Total (cfs)
Len9th wtd. (ft)
Min ch El (ft)
Alpha
Fretn Loss Cft)
C & E Loss (ft)

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warning:
Warn; n9:
Warn; n9:

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.
i~r 5 e~:~gr n~~~:t:~h~r~:~~r f~~a~d~i ~i :~a ~o ~~:~ . s~~~:~~. the current. and previous cross sect; on.
During the standard step iterations. when the assumed water surface was set 4!9ual to critical
depth. the calculated water surface came back below critical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth. _

Left DB
D.060
493.09
9.97
9.97
34.92
5.65
3.50
1.76
323.4
6.65
1.D9
3.82
29.49
19.57

channel
0.035
498.06
145.94
145.94
1540.61
41. 75
10.56
3.50
14271.0
41. 75
2.54
26.85
57.15
17.48

Ri8~~6gB

503.19
20.22
20.22
81.48
10.32
4.03
1.96
754.7
10.93
1.35
5.42
28.24
19.54

CROSS SECTION OUTPUT Profile '50-year
M' H~~~v (m) 7902.51 Element Left OB Channel Ri 8~~6~
1.84 wt. n-val. 0.060 D.035
w.S. Elev (ft~ 7900.67 Reach Len. (ft) 493.D9 498.06 503.19
crit w.S. (ft 7900.67 Flow Area (sq ft) 12.90 166.23 25.45
E.G. slope (ft/ft) 0.011156 Area fS~ ft) 12.90 166.23 25.45
Q Total (cfs) 2031.DO Flow c s) 48.20 1872 .42 110.38
TO~ Wi dth ~ft) 59.36 Tap Wl dth ~ft) 6.43 41. 75 11.18
Ve Total ftls) 9.93 AVS' vel. ftls~ 3.74 11.26 4.34
Max chl Dpth (ft~ 3.98 Hy r. Depth (ft 2.01 3.98 2.28
Conv. Total ~cfs 19229.D Conv. (cfs) 456.3 17727.7 1045.D
Length wtd. ft) 498.41 wetted Per. (ft~ 7.56 41.75 11.92
Mi n ch El (ft) 7896.69 shear (lb/sq ft 1.19 2.77 1.49
Alpha 1.20 Streillll Power (l 1ft s) 4.44 31.24 6.45
Frctn LOss ~ft~ 5.04 Cum vol Wle (acre-ft) 36.05 63.94 36.54
C & E Loss ft 0.02 cum SA (acres) 21.57 17.48 22.92

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warni ng:
Warni ng-:
warni ng:

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 energ~ loss was greater than 1.0 ft (0.3 III). between the current and previous cross section.
This may lndicate the need for additional cross sections.

~~~t~~ ~~: ~~T~~T~~e~t:~t~~e~~~}:~:-. C::nb~~~ C:f:e~rV:f~~ls~~:~~~ w~i:efn~?~:~e~ t~~~t~~:~e is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Profi 1 e 'SOG-year
~e ~. H~~~v (~{P 7903.34 El ement Left 08 channel Ri 8~~6~
2.09 wt. n-Val. 0.060 0.D35
~~~i: ~~;~ ~~g 7901. 25 Reach Len. (ft) 493.09 498.06 503.19
7901. 25 Flow Area (sq ft) 16.9D 190.44 32.23
E.G. Slope (ft/ft) 0.010670 Area fs~ ft) 16.9D 19D.44 32.23
Q Total (cfs) 2515.DO Flow c s) 67.55 2297.13 15D.31
~~~ ~~~~ ~mS) 61. 31 TOp Wl dth rt) 7.35 41.15 12.21
10.50 AVS' Vel. ft/s~ 4.00 12.06 4.66
Max ch 1 Dpth (ft~ 4.56 Hy r. Depth (ft 2.3D 4.56 2.64
Conv. Total ~cfs 24347.4 Conv. (cfs) 654.D 22238.2 1455.2
Length wtd. ft) 498.45 wetted Per. (ft~ 8.65 41.75 13.09
Min ch El (ft) 7896.69 shear (lb/sq ft 1. 3D 3.04 1.64
Alpha 1.22 Stream Power (1 1ft s) 5.20 36.65 7.65
Frctn Loss ~ft) 4.90 Cum volume (acre-ft) 45.89 72.26 48.26
c & ELoss ft) 0.02 Cum SA (acres) 26.10 17.48 27.02

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warni ng:
Warni ng:

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.
+~~s e::~g~n~~~:t:a~h~r~:~~r f~~a~dai~i:~afOc~o~~. s~~~~~~. the current and previous cross section.
During the standard step iterations. when the assuned water surface was set equal to critical
depth, the calculated water surface came back below critical depth. This ind1cates that there is
not a valid subcritica1 answer. The program defaulted to critical depth.

CROSS SECTION

Bank Sta: Left Ri9ht Lengths: Left Channel Right Coeff Contr. Expan.
73.32 95.76 479.98 486.68 492.59 .1 .3
CROSS seCTION OUTPUT Prof; 1 e IIOO-year
~e ~. H;~~v (~g> 7895.10 E1 ement Left OB channel Ri8~~6gB
2.10 wt. n-Val. 0.06D 0.D35
w.S. Elev ~ft~ 7893.00 Reach Len. (ft) 479.98 486.68 492.59
crit w.s. ft 7893.0D Flow Area (sq ft) 3D.32 128.90 78.25
E.G. Slope (ft/ft) 0.009127 Area ~s~ ft) 30.32 128.90 78.25
Q Total (cfs) 2181. 00 Flow c s) 132.26 1676. 97 371.77
TO~ Wi dth ~ft) 59.45 Tap Wi dth ~ ft) 10.68 22.44 26.33
Ve Total ftls) 9.18 AVS' vel. ftls) 4.36 13.01 4.75
Max ch 1 Dpth (ft~ 5.76 Hy r. Depth (ft) 2.84 5.74 2.97
Conv. Total (cfs 22828.9 Conv. (cfs) 1384.4 17553.2 3891.4
Length wtd. (ft) 487.15 wetted Per. (ft) 12.12 22.44 27.50
Min ch El (ft) 7887.24 ~~~:~ (~~:~ m/ft s) 1.43 3.27 1.62
Alpha 1.60 6.22 42.58 7.70
Frctn Loss (ft) 4.87 Cum volume (acre-ft) 38.60 64.77 39.56
page 29

warni ng:

RIVER: crystal
REACH: Marble

RS: 15909

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INPUT
oescri pti on:
station Elevation Data nullP
Sta Elev Sta Elev
o 7936.08 9.31 7926.67
19.6 7917.8 21.487916.72
40.97 79D5.49 44.96 7902.95
56.84 7896.4 61.97 7893.36
73.32 7887.28 95.76 7887.24
116.03 7890.23 111.68 7891.04
140.D3 7895.76 141.58 7895.83
161.D5 7896.81 162.49 7896.98
177 . 76 7902.73 181 7905.05
211.34 7925.83 213.387927.14
226.59 7926.76

51
Sta Elev
11. 31 7924.91
32.94 7910.22
47.5 7901.47
68.73 7889.79
99.3 1888.85
120.25 1892.13
143.98 7895.98
163.87897.38
192.247913.84
213.817927.35

Sta E1ev
14.43 7922.25
33.07 7910.15
51.45 7899.37
69.4 7889.41
100.64 7889.61
126.28 7894.99
149.44 7896.23
17D.53 7899.61
199.46 7918.82
218.24 7927.14

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Manning's n Values
Sta n val Sta
D .06 73.32

3
Sta
95.76

nUIII=
n val
.D35

n val
.06

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Sta E1ev
19.15 7918.17
37.567907.76
54.73 7897.61
72.57 7887.69
106.97 7889.89
128.15 7895.1
151.92 7896.45
175.69 79D1.43
2D6.71 7923;37
223.22 7926.92