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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C & E lOSS (ft)

0.06

Cum 5A (acres)

20.19

~~nalR1ve~ci~f

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warning:
Warn; ng:
warn; ng:
warning:

The energy equation could not be balanced within the specified number of iterations. The
pro9ram used critical depth for the water surface and continued on with the calculations.
OiVl ded flow computed for this cross-section.
The energ~ 10s$ 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.

~~~~~: ~~: ~~f~~f~~e~t:~t~~e~:~}:~: t c::" b;~k ~:f::e~r~;fi~ 1 s~~:~~~ w~i ~ef n~~:~e~o t~~ t~~:~e is
~~f tf p r: 1 ~~i ~~~~fi ~~~;~s a::~:r fou~~e a~r~gf:m l:~:;~~~~d ~e c~~f~~~~ 1 d~~~~h wi th the lowest I val i d I water
surface was used.

Note:

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CROSS SECTION OUTPUT Prof; 1 e IFl Gadway
~e~'H~~av(m) 7833.92 Element Left DB Channel Rit8~B
1.79 wt. n-val. 0.060 0.035
W.S. Elev fft~ 7832.13 Reach Len. (ft) 514.62 494.08 474.87
crit W.S. ft 7832.13 Flow Area (sq ft) 112 . 56 110.36 29.67
E.G. slope (ft/ft) 0.012664 Area fs~ ft) 112.56 110.36 51.11
Q Total (cfs) 2181. 00 Flow c 5) 649.75 1404.96 126.29
TOf width fft) 158.23 TOp width ~ft) 37.12 25.37 95.73
Ve Total ft/s) 8.63 AVS' vel. ft/S~ 5.77 12.73 4.26
..ax ch 1 Dpth (ft~ 4.38 Hy r. Depth (ft 3.03 4.35 1.97
Cony. Total ~cfs 19380.4 Conv. (cfs) 5773.7 12484.5 1122.2
Length wtd. ft) 496. 58 Wetted Per. (ft~ 37.76 25.37 15.71
..in ch El (ft) 7827.75 shear (lb/sq ft ,~~ 2.36 3.44 1.49
Alpha 1.55 Stream Power (11ft 5) 13.61 43.78 6.35
Fretn Loss m~ 6.53 Cum Volume (acre-ft) 13.91 63.85 10.08
C&ELOSS 0.02 Cum SA (acres) 5.39 15.51 4.23

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I

Warning:
warni ng:
warni ng:
warning:

The energy equation could not be balanced within the specified number of iterations. The
gi~?d~ ~~~~ ~~~~~~:~ 1~~t~hf~r c~~:s~:~~~i~~~face and continued on with the calculations.
The energy 1055 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.
~~;~~~ ~~: ~~f~~f~~e~t:~t~~e~~~}:~:. c::nb~~~ ~~::e~r~f~~ls~~:~~~ w;~i:eln~?~:~e~o t~~~t~~:~e is
~~ftfpr:l~~i~.~~~fi~~~~~s a:~rfou~~ea~r~~i:-lg~~~~~~~d i~e c~~n~~~ld~:~~h with the lowest. valid. water
surface was used.

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Note:

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CROSS SECTION OUTPUT Profi 1 elllO-year
~e ~. H~~av (~~j) 7833.03 Element Left OB chan"e 1 Ri 8~8~B
1.43 wt. n-val. 0.060 0.035
W.S. Elev fft~ 7831. 60 Reach Len. (ft) 514.62 494.08 474.87
Crit W.S. ft 7831. 60 Flow Area (sq ft) 93.20 96.90 22.87
E.G. Slope (ft/ft) 0.011845 Area ~s~ ft) 93.20 96.90 22.88
Q Total (cfs) 1657.00 Flow c 5) 470.13 1094.04 92.83
TOf Width ~ft) 74.30 Top W1 dth f ft) 35.87 25.37 13.05
Ve Total ft/s) 7.78 AVS' vel. ft/s~ 5.04 11.29 4.06
..ax Ch 1 Dpth (ft~ 3.85 ~n~: ~~~~~ (ft 2.60 3.82 1.94
Conv. Tota 1 ~cfs 15225.2 4319.8 10052 . 5 853.0
Length wtd. ft) 495.89 Wetted Per. (ft) 36.40 25.37 12.37
..in ch El (ft) 7827.75 ~~~:~n8~:~ m/ft 5) 1.89 2.82 1.37
Alpha 1.52 9.55 31.89 5.55
Frctn Loss m~ 5.78 Cum vol urne (acre-ft) 25.17 49.71 24.43
C&ELoSS 0.03 Cum SA (acres) 17.49 15.51 17.09

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I

Warning:
Warning:
Warni ng:
warni ng:

The energy equation could not be balanced within the specified number of iterations. The
provram used critical depth for the water surface and continued on with the calculations.
OiVlded flow computed for this cross-section.
The. energ~ loss was greater than 1.0 ft CO.3 m). between the. current and previous cross section.
This may lndicate the need for additional cross sections.
During the standard step iterations, when the assumed water surface was set ~ual to critical
depth, the calculated water surface came back below critical depth. This imhcates that there is

~~f t~ P 1: 1 ~~i ~~~~fi ~~~~~s a:~:r fou~~e a~r~f:m 1 ~~:~~~~~d ~e c~~f~f~ll d~~~~h wi th the lowest, va 11 d, water
surface was used~

Note:

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CROSS SECTION OUTPUT Profi le #50-year
~e~' H~~aV (~W 7833.67 El ement Left 08 Channel Ri 8~86gB
1.71 Wt. n~val. 0.060 0.035
W.5. Elev~ft~ 78l1. 96 Reach Len. (ft) 514.62 494.08 474.87
Crit W.S. ft 78l1. 96 Flow Area (sq ft) 106.19 105.98 27.27
E.G. Slope (ft/ft) 0.012689 Area fs~ ft) 106.19 105.98 36.74
Q Total (cfs) 2031.00 Flow c 5) 594.76 1314.67 121.58
TOf wi dth f ft) 132 . 31 TOp wi dth f ft) 36.73 25.37 70.21
Ve Total ft/s) 8.48 AVS' vel. ft/s) 5.60 12.40 4.46
..ax ch 1 opth (ft) 4.21 ~~n~: ~~~~~ (ft) 2.89 4.18 2.13
Conv. Total (cfs) 18030.1 5279.9 11670.9 1079. 3
Length Wtd. (ft) 495.88 wetted Per. (ft~ 37.33 25.37 13.50
..in ch El (ft) 7827.75 shear (lb/sq ft 2.25 3.31 1.60
Alpha 1.53 Stream Power (1 /ft s) 12.62 41.05 7.14
Frctn Loss (ft~ 6.26 Cum Volume (acre-ft) 31.01 55.64 31.78
C & E loss (ft 0.03 Cum SA (acres) 19.41 15.51 19.93

I

I

Warni ng:

Warn; ng:
warni ng :

warni ng:

The energy equation could not be balanced within the specified number of iterations. The
pro~ram used critical .depth for the water surface and continued on with the calculations.
Divlded flow computed for this cross-section.
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.
During the standard step iterations. when the assumed water surface was set e9ual to critical
depth. the calculated water surface came back below critical depth. This inchcates that there is

~~ft~pr:1~~i~~~~fi~~~~~s a~~~:rfou~~ea~r~~f:ml:~:~~~~~d i~e c~~f~f~~ld~~~~h with the lowest, valid. water
surface was used.

I

Note:

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CROSS SECTION OUTPUT Profile #500-year
~e~' H~~av (m) 7834.46 E1 ement left OB channel Ri 8~86gB
1.94 wt. n-val. 0.060 0.035
W.S. Elev (ft~ 7832.52 Reach Len. (ft) 514.62 494.08 474.87
cdt W.S. (ft 7832.52 Flow Area (sq ft) 127.16 120.22 36.53
E.G. Slope (ft/ft) 0.012334 Area fs~ ft) 127.16 120.22 99.51
Q Total (cfs) 2515.00 Flow c s) 772 . 29 1599.06 143.65
TOf wi dth f ft) 222.36 TOp wi dth (ft) 38.04 25.37 158.95
Ve Total ft/s) 8.86 AVS' vel. (ft/s~ 6.07 13.30 3.93
..ax ch 1 opth (ft~ 4.77 fly r. De~th (ft 3.34 4.74 1.77
Conv. Total (cfs 22646.0 Conv. (cfs) 6954.0 14398.6 1293.5
Length wtd. (ft) 495.31 wetted Per. (ft~ 38.76 25.37 21.37
..in ch E1 (ft) 7827.75 shear (lb/sq ft 2.53 3.65 1.32
Alpha 1.59 Stream Power (lb/ft s) 15.34 48.5l 5.18
Frctn Loss ~ft~ 5.33 Cum volume (acre-ft) 39.92 63.02 42.09
C&ELoss ft 0.16 Cum SA (acres) 23.85 15.51 23.01

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I

warni ng:
Warn; ng :
warni ng :
Warning:

The energy equation could not be balanced within the specified number of iterations. The
provram used critical depth for the water surface and continued on with the calculations.
DiVlded flow computed for this cross-section.
The velocity head has changed by more than o.s ft (0.15 m). This may indicate the need for
additional cross sections.
The energy 10s5 was greater than 1.0 ft (0.3 m). between the current and previous cross section.
Page 37

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