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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~e~'H~~~V(~W
w.~. [lev eft)
craw.S. (ft)
E.G. Slope (ft/ft)
QTotal (cfs)
Top Width (ftc)
vel Total (ft/s)
MaxChl Opth (ft)
conv, Tota] (cfs)
Length Wtd. (ft)
MinchEl (ft)
Alpha
Frctnloss(ft)
C <<. E Loss eft)

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\IIarning:
warning:
warning:
Warning:
warning:

Theenergyequationcouldnotbebalancedl'lithinthespecifiednumberofiterations. The
pro!1ramused critical depth for the water surface and continued on with the calculations.
Oivlded flow computed for this cross-section.
The velocity head has changed by more thanO.S ft (O.1Sm), This may indicate the need for
additional cross sections.
i~~ 5 e~:;gr n~~~:t:a~hr~:~~r f~~a~d~i ~i~~afoc~o~~' s~~~i~~~. the current: and prey; aus cross section.
During the standard step iterations, wh.m the llssumed water surhce was set equlll to critical
depth, the calculated water surface came back below critical depth. This indlcates thllt there is
~~f t~ Pl:l ~~i~~~~~i a~~~~s a~~~r fOU~~e a~r~~i:ml~~~~~~~~d ~~e c~~nf~~ 1 dd~~~ii wi th the lowest, val i d, wllter
surface was used.

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Note:

7824.68
1.33
7821.35
7821.35
0.011462
1657.00
119.43
8.06
3.21
15477.0
471.13
7820.14
1.32
5.36
0.23

Element
Wt. n.val.
RellchLen. (ft)
Flow Arell (sq ft)
Area <sq ft)
Flow ~cfs)
TopWldtn(ft)
Avg. Vel. (ft/s)
Hydr.Depth(ft)
cony. (cfs)
Wetted per. (ft!
shell.r(1b/sqft
streamPower(l/fts)
eumllolume(a.<:re-ft)
Cum SA (acres)

Leftoa
0.060
450.77
15.81
15.81
57.26
9.36
3.62
1.69
534.8
9.90
1.14
4.14
24.52
17.23

eryst1l.1R;ver.rep
eS~~~~l Rig~~6ga
472.93 50LlS
146.82 42.94
146.82 68.31
1440.42 159.32
46.30 63.77
9.81 3.71
3.17 1.67
13454.1 1488.1
46.30 25.93
2.27 1.18
22.26 4.40
'IS,31 n.'!&.
lS.lO 16.67

CROSS SECTION OUTPUT Profile#50-year
~er' H~~dv (~W 7825.27 Element Left OR Channel Rig~66gl1
1.62 ~. n-val. 0.060 O.OH
w.~. Elev ~ft~ 7823.65 Reach Len. (ft) 450.77 472.93 503.15
Crltw.s. ft 7823.65 Flow Area (sq ft) 18,74 160.57 50.85
E.G. slope (ft/ft) 0.012545 ~~~: t~~srt) 18.74 160.57 88.03
QTotal (cfs) 2031.00 71.07 1749.28 210.65
~~~ ~~~~~ H~~s) 126,28 TOp width ~ft) 11.13 46.30 68.85
8.82 AV~. vel. ft/s) 3.79 10.89 4.H
Max ehl Opth (ft~ l.51 Hyr.oepth(ft) 1.68 3.47 1.84
cony. Total ~Cfs 15133.5 cony. (cfs) 634.5 15618.2 1880.7
Length wtd. ft) 471.12 wetted Per. (ft~ 11.72 46.30 27.87
MinehEl (ft) 7820.14 shear (lb/sqft 1.25 2.n 1.43
Alpha 1.34 StreamPower(l/fts) 4.75 29.59 5.92
FrctnLoss tft) 5.86 cum volume (acre-ft) 30.27 54.13 31.10
C &. E LOSS '" 0.29 Cum SA (acres) 19.13 15.10 19.18

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warning;
Warning:
warning:
warning:
warning:

The energy equation could not be balanced within the specified nu mberofiterations. The
pro!jlram used critical depth for the water surface and continued on with the calculations.
Oivlded flow computed for this cross-section.
Thellelocityhead has changed by more thanO.5ft (0.15m). This may indicate the need for
additional cross sections.
~~f s e~:?r n~r~:t:a~hr~~~:;r f~~a:da;~i~~llfO~~o~~' s~~~~~~~. the current and prellious cross section.
~~~~h~ ~~: ~~~~~~~~e~t=~t~~e~~~}~~~, c:~:\~~~ ~~l~:e~r~~f~~l s~~~~h~ w~~i ~ef n~~~:~e~o th~~ t~h:~e is
~~f t\' p i: 1 ~~i ~~~~~i a~~~~s a;:~:r fou~~e a~r~~i:ml~~~~~~~~<l ~~e c~~~~f~~ 1 dd~~~ii wi th the lowest, lIa 1 i d,
surface was used.

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NOte:

C~OSS SECTION OUTPUT profile #500-year

The energyeql.lation could not be balanced within the specified numb er of iterations. The
program used cntical depth for the wate~ surface and continued on with the calculations.
The lIelocityhead has changed by more than 0.5 ft (0.15m). This may indicate the need for
.,j~i:tion.' ~~nu .n~";nn.
The energy loss was g~eater than 1.0 ft (0.3 m). between the current and previ ous cross secti on.
ThismayindicatetheneedforadditionalcrosssectiollS.
During the standard step iterations, when the assumed water su~face was set e'lual to critical
depth, the calculated water surface came back below cntical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth.
CROSSSECHON

INPUT
Oescription:
Station Elevation Data "um~
Sta Elev Sta Elev
o 78~4.32 9.67 7831,45
29.677826.49 31.387825.97
48.787824.05 52.217823.71
121.387822.42149.677822.51
202.867822.47204.967522.57
231.387821.13 239.677820.97
269.677820.17279.677820.09
309.67781'L43 311.387819.38
331.387818.27339.677817.79
372.17815.36 376.37814,99
411.387814.76421.387814.82
447.697813.57451.387814.02
468.077815.73 471.387815.75
497.217815.02510.187814.81
528.11 7813. 96 5~0. 44 7813.97
547.357513.85548.477814.08
559.077814.52561.527813.85
581.827813.06 585.487813.32
643.897813.9 &&.8.127813.88
660.727815.03673.577814.52
694.137818.82 &95.897819.47
712.447817.16716.647817.25
7~7. 01 7817.31 740.63 7817 .18
763.457817.56767.477817.68
797.937818.1815.2&.7818.37
832.517818.57855.837818.75
899.487818.6901.577818.56
944.737518.33 950.257818.34

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E.G. Elell(ft)
vel Head (ft)
~r~i: ~:i~ ?~g
E.G. s10pe (ft/ft)
Q Total (cfs)
~~~ *~~~~ m~S)
MaKchl Opth (ft)
conll. Total (ds)
Length wtd. (ft)
MinehEl{ft)
Alpha
FrctnLos5 (ft)
C"'ELoss (ft)

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warning:

warning:

warnin9:

Warning:

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~IVER: crystal
~EACH: Marble

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7825.65
1.40
11114.25
7824.25
0.009485
2515.00
145.71
7.21
4.11
25823.1
472.09
7820.14
1.73
4.78
0.23

~S: 12347

Element
Wt. n-Val.
Il.e~tl'l Len. (ft.)
Flow Area (sq ft)
Arell.Csqft)
Flow (ds)
Top w,dth (ft)
Avg.vel. (ft/s)
Hydr. Depth (ft)
Cony. (cfs)
~h~~~d (n:jsq (m
stream Power (lb/ft s)
Cum volume (acre-ft)
Cum SA (acres)

LdtOB
0.060
450.71
28.46
28.46
82.67
20.93
2.90
1.36
848.8
21.54
0.78
2.27
39.00
23.50

water

Channel
o .O~ 5
472.B
188.n
185.n
1983.85
46.30
10.54
4.07
20369.4
46.10
2.41
25.37
61.27
15.10

~i~~~6gB
503.1.5
132.12
132.12
448.48
78.48
3.39
1.68
4604.9
79.14
0.99
3.36
40.83
21.72

'"
Sta EloII sta Elell S-ta Elev
11.387830.94 19.677828.48 21.387827.95
40.21 7825 42.237824.77 43.6Z7824.62
55.377823.47 61.387823.07 71.037822.39
159.677822.51 189.677822.23 199.677822.3S
209.487821.66211.387821.21 219.677821.06
241.387820.9249.677820.59251.387820.52
289.677819.92 299.67 7819.7 301.387819.65
319.677819.17321.387819.04329.677818.4
351.387817.18359.677816.44371.38781>.42
381.387814.95389.677814.96399.677814.83
429.677814.77 439.677814.17 441.387814.04
453.317814.27 461.077815.26 464.797815.74
479.677815.62481.387815.52489.677815.15
512.237814.81519.417814.02 5257813.81
532.927813.93 536.567813.88 539.177813.88
552.627814.92 555.67815.51557.247815.05
562.737813.51 565.78 7812.6 572.787812.84
592.37 7813.47 607.257814.01611.56 78B.92
&50.387&14.42: &i4.387815.17 657.43 7815.2
682.567815.47685.787815.79690.467817.47
697.027819.88698.847819.23 704.297817.02
720.297817.27726.867817.29728.927817.27
746.197817.47754.827817.54757.327817.57
777.637817.71 780.717817.73 787.787818.01
818.247818.41 823.887818.5 828.47818.53
884.37818.65889.327818.64892.947818.62
909.637518.38913.437818.36940.097818.36
953.367818.341028.627818.491031.057818.5

Page 39