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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crystalRiver. rep

Boundary condi tions
River Reach

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crystal
cryst.l
crystal
crystal
crystal

Marble
M.rble
Marble
Marble
M.rble

Prof; 1 e
lOO-year
Flooilw.y
lO-year
50-year
SOO-year

upstream

Downstream

No.....l s _ 0.013
, No....al S - 0.013
No.....l S - 0.013
Nor".l S ;. 0.013
Nor".l S - 0.013

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GEOMETRY DATA

~:::~~ ~ f~e; ~~~~~~~o~1~~~\:~~~:u~f~~\crystal River. g04

CROSS SECTION

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RIVER: crystal
REACH: Marble

RS: 24407

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INPUT
Description:
Station Elevation Data null'P
Sta Elev Sta Elev
o 7966 2.6 7965.01
18.73 7958.43 18.947958.35
51.06 7953.44 57.24 7954.89
68.247956.92 70.85 7957.24
89.98 7959.71 91.3 7959.87
100.95 7962.04 102.1 7963.14
122.937983.05 123.55 7983.58
132.72 7993.27

36
Sta Elev
8.34 7962.45
29.97 7954.11
60.43 7955.58
75.17 7957.81
91.68 7959.92
107.42 7968.22
125.67 7985.67

Sta Elev
10.66 7961.58
31.68 7953.47
60.68 7955.64
81.26 7958.63
92.05 7959.96
112. 52 7973.08
131. 61 7992.22

Sta Elev
18.61 7958.47
45.99 7953.44
64.51 7956.47
83.23 7958.9
99.85 7960.99
115.49 7975.92
132.37 7992.84

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Manning's n values
Sta n val Sta
o .06 31.68

nu~
n val
.035

3
Sta
51.06

n val
.06

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Bank Sta: Left Ri ght Lengths: left Channel ;~~~~ coeff Contr. Expan.
31.68 51.06 773.34 831.57 .1 .3
CROSS SECTION OUTPUT Profile #IOO-year
~e~' H~~~v (~~p 7960.52 Element Left 08 channel Rig~~6g8
1.81 wt. n-val. 0.060 0.035
w.s. Elev ~ft) 7958.71 Reach Len. (ft) 773.34 831.57 855.60
Crlt w.s. ft) 7958.71 Flow Area (sq ft) 35.87 101.82 69.86
E.G. Slope (ft/ft) 0.009191 Area ~s~ ft) 35.87 101.82 69.86
Q Tot.l (cfs) 1691. 00 Flow c s) 154.81 1252.49 283.70
TO~ wi dth ~ft) 63.80 Top wi dth ~ft) 13.67 19.38 30.75
Ve Total ft/s) 8.15 AV9' vel. ft/s~ 4.32 12.30 4.06
Max chl Dpth (ft~ 5.27 Hy r. Depth (ft 2.62 5.25 2.27
Conv. Total (cfs 17638.5 Conv. (cfs) 1614.8 13064.5 2959.2
Length wtd. (ft) 833.07 wetted Per. (ft~ 14.64 19.38 31.23
Mi n ch El (ft) 7953.44 Shear (lb/sq ft 1.41 3.01 1.28
Alpha 1. 76 Stream Power (1 1ft s) 6.07 37.08 5.21
Fretn Loss ~ft~ 7.43 Cum volume (aere-ft) 105.07 102.62 185.73
C&ELoss ft 0.29 Cum SA (acres) 49.85 26.60 67.93

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warning: 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.
warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections.
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.
Warning: During the standard step iterations, when the assumed water surface was set equal 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..

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CROSS SECTION OUTPUT Profile #Floodway
~e~' H~~~v (m) 7960. 52 Element Left 08 Channel Ri g~~6gB
1.B1 Wt. n-val. 0.060 0.035
w.s. Elev (ft~ 7958.71 Reach Len. (ft) 773. 34 831.57 855.60
Crit w.s. (ft 7958.71 Flow Area (sq ft) 35.87 101.82 69.86
E.G. slope (ft/f<) 0.009191 ~1~ ~~Mt) 35.87 101.82 69.86
Q Total (cfs) 1691. 00 154.81 1252.49 283.70
TO~ wi dth ~ ft) 63.80 TOp W1dth ~ft) 13.67 19.38 30.75
Ve Tot.l ft/s) 8.15 AV9' vel. ft/s~ 4.32 12.30 4.06
M.x chl Dpth (ft~ 5.27 Hy r. Depth (ft 2.62 5.25 2.27
conv. Total (cfs 17638.5 Conv. (cfs) 1614.8 13064.5 2959.2
Length wtd. (ft) 835.90 wetted Per. (ft~ 14.64 19.38 31.23
Mi n ch El (ft) 7953.44 she.r (lb/sq ft 1.41 3.01 1.28
Al ph. 1.76 Stream Power (lb/ft s) 6.07 37.08 5.21
Fretn Loss (ft~ 8.47 Cum vol urne (acre-ft) 30.77 112.79 25.39
c &. E Loss (ft 0.23 Cum SA (acres) 12.33 26.60 9.56

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warning: 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.
warning: The velocity head has changed by more than 0.5 ft (0..15 m). This may indicate the need for
additional cross sections.
warning: The eoergv 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.
warning: During the standard step iterations. when the assumed water surface was set equal to cr-itical
depth, the calculated water surface came back below critical depth. This indlcates that there is
not a valid subcritical answer. The progrilll defaulted to critical depth.

CROSS SECTION OUTPUT Profi 1 e #10-year

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E.G. Elev (ft) 7959.57 Element Left 08 channel Ri g~~6gB
vel Head (ft) 1.64 wt. n-val. 0.060 0.035
W.S. Elev (ft~ 7957.93 Reach Len. (ft) 773.34 831.57 855.60
crit W.S. (ft 7957.93 Flow Area (sq ft) 26.09 86.85 48.32
E.G. slope (ft/ft) 0.009886 ~1~: ~~~srt) 26.09 86.85 48.32
Q Tot.l (cfs) 1284.00 105.04 996. 54 182 .42
~~~ ~~~~ ~~~~s) 56.05 Tap wi dth ~ ft) 11.65 19.38 25.02
7.96 AV9' Vel. ft/s~ 4.03 11.47 3.78
Max chI Dpth (ft~ 4.49 Hy r. Depth (ft 2.24 4.48 1.93
ConY. Total (cfs 12913.8 Conv. (cfs) 1056.5 10022 .7 1834.6
Length wtd. (ft) 833.02 wetted Per. (ft~ 12.48 19.38 25.45
Mi n ch El (ft) 7953.44 she.r (lb/sq ft 1.29 2.77 1.17
Alpha 1.66 Stream Power (l /ft s) 5.20 31.74 4.42
Frctn lOSS (ft) 11. 06 Cum vol urne (acre-ft) 81.45 86.84 155.22
C&ELOSS (ft) 0.09 Cum SA (acres) 43.93 26.60 60.57

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warning: 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.. .
warning: During the standard step iterations, when the assumed water surface was set equal to critical
depth, the calculated water surface came back below critical depth. This indlcates that "there is
not a valid subcritical answer. The progrAII defaulted to critical depth.

CROSS SECTION OUTPUT Profile #50-year

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