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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FrctnLoss(ft)
C&ELoSS(ft)

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warning;
warning:
warning:
warning:
warning:

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 tile calculations.
oi'n~d flt'm computed for tms cross-section.
The velacity head has changed by more thanO.S ft (O.1Sm). This may indicate the need for
addition..lcrosssections.
The energ:t' 1055 was greater than 1.0 ft (O.llll). between the current and previous cross section.
ThismaYlndicatetheneedforadditionalcr05ssectipns.
During the stand..rd step iterations, wilen the assumed water surface was set equal to critical
depth, the calculated water surhceca.lllebacl<.helowcrltlcal aepth. n..hindH;atesthattnereis
not a valid subcritical answer. The program defaulted to critical depth.
CROSS SECTION

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RIVER: crystal
!tEACH: Marble

RS: 13779

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INPUT
oescription:
station Elevation Data num_
Sta Elev Sta Elev
07872.16 1.227871.76
21.567861.06 28.967857.51
52.07 7850 58.977848.33
73.467843.13 78.977843.1
102.927842.71113.097842.68
153.77 7842.7 158.987842.54
1.7S.967840A5 UIL9911B8.98
221.617835.21 228.997836.68
2427840.01247.277839.93
2697840.01276.847839.93
292.497843.28296.787843.41
326.657843.42329.017843.56
387.677843.91 428.347844.6\
463.337845.27 470.117845.33
493.211846.03500.267846.lS
524.327847.25525.677847.43
542.267847.58546.337847.71
561.427848.42 566.37848.61
582.717849.57585.33 7849.94
596.987851.72603.177851.78
630.247852.12 632.427852.13
648.457852.24651.22 7852.2
674.977854.42677.437854.9
686.547855.89689.867856.13
700.947858.15702.137858.31
lB.137659.86 714.178&0.19
729.377864.03753.287863.61
778.087860.08780.247860.1
795.337861.l6 801.097861.88
812.097862.96817.977863.85
834.117865.53840.437865.55
855.467867.03855.927867.1
869.387868.28874.067867.8\

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5.68
0.13

cum volWlle (acre-ft)
cum SA (acres)

Cl)'stalRiver.rell
66.45 44.44
16.26 25.10

41.55
24.42

>G'
SU Elev
8.967868.7
31.731856.61
62.247847.35
82.587843.11
118.987842.71
163.941842.47
186.211816.05
235.127838.34
255.467839.88
277.367840.06
2991843.51
346.991843.56
446.95784$.1
478.427845.54
502.597846.17
531.071847.49
548.191847.78
568.971848.84
590.41850.71
606.697851.79
636.267852.13
661.257852.38
677.85 7855
691.141856.27
704.791858.73
72...071862.;2
754.141863.44
782.747860.24
802.881862.08
823.097864.26
845.081865.84
858.487867.42
877.967869.14

Sta Elow
11.767866.82
38.977854.18
68.977844.93
88.977843.08
138.987842.71
168.987842.38
188.647834.89
238.997839.22
2597839.91
285.67843.07
306.317843.62
349.017843.55
449.237645-15
482.227845.66
509.15 7846.2
537.197847.43
553.877847.96
570.187848.9
592.177851.02
621.877851.88
638.457852.12
663.247852.68
681.117855.02
694.117856.81
710.597859.44
724.657863.45
769.037860.65
787.797860.7
806.787862.43
825.737864.79
848.157866.17
!l67 .03 7868.~6
879.387869.55

Sta Elev
16.537863.65
48.977850.93
72.697843.l6
98.977842.81
143.67842.7
171.717842.22
220.097834.89
240.367839.61
265.637819.9
287.917843.21
3097843.29
369.017843.68
~60.22 ?8<\LH
485.96784,.79
516.727846.21
538.787847.5
559.197848.25
577.077849.18
~94.43 78~1.13
624.837851.91
643.527852.17
668.397851.73
684.417855.53
695.877857.46
711.97859.62
7287863.87
771.657860.18
790.17860.87
810.427862.79
830.837865.23
854.887866.97
1161\..1& 7B~8.51

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Manning's nl/aluu num.. \
sta n val '" oval ", nval '" nval '" nl/al
0 .00 175.96 .os 188.64 .035 220.09 .os 276.84 .00
sankSta: Left Right lengths: left channel Right coeffContr. Expan.
18S.64 220.09 465.25 464.83 465.06 ., .l

CROSS SECTIO~ OUTPUT profi le #10D~year
~e~' H~~~v (~~~) 7841.52 Element left os Channel Rig~65~B
1.~8 w.. n-val. 0.050 0.035
~~it ~~~~ tm 7839.64 Reachlen. (ft) 465.25 464.83 465.06
7839,64 Flow Area (sq ft) 25.84 149.26 50.86
E.G. slope (ft/ft) 0.009909 Area ?s~ ft) 25.84 149.26 50.86
QTotal (cis) 2181.00 Flow c $) 127.57 1781.48 271.94
~~~ ~~~~~ ~~us) 62.83 Top Wl dth ~ft) 11.00 l1.45 20.38
9.65 AV~. vel. ft/.sS 4.'!4 n.'!4 5.15
~~~v~h~o~nh (~m 4.75 Hyr.Depth(f1: 2.35 4.75 2.50
21910.4 conll. (cfs) 1281.6 17896.8 2732.0
len9thW1:d. (ft) 464.93 wened per. (f1:~ 11.99 31.45 20.93
MinchEl (ft) 7834.89 Shear (lbj.q ft 1.33 2.94 1.50
Alpha 1.30 Stream power (1 /ft s) 6.58 35.04 8.04
~T~ t~~~ ~m 5.19 cum lIolume (acre-ft) 34.26 5'1.27 3;.52
0,03 Cum SA (acres) 20.44 15.81 21.24

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warning:
warning:
Warning:

The energyequnion could not be balanced within the.specifiedoumb er of iteration.. The
program used critical c!ep1:h for the water surface and continued on with the calculations.
Theenergylosswasgreaterthanl.0ft(0.3m).between1:hecurreotand previous cross section.
This maY1ndicne the (leed for addi1:ional cross sections.
During the sundard step iterations, when the assumed water surface was set e9ual to critical
depth, the calculated water .urface Came 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
~~? H~~r (~~f 7841.52 Element left OS Channel Rig~~5gs
1.88 ". n-val. 0.050 O.OlS
~rit ~~~~ ~m 7839.64 Reachlen. (ft) 465.25 464.83 465.06
7839.64 Flow Area (sqft) 25.84 149.26 50.86
E.G. slope (ft/ft) 0.009909 ~r~ ~~~srt) 25.84 149.26 50.86
Qrotal (cfs) 2181.00 127.57 17~1. ~s 271..,4
~~~ ~~~~~ ~~i~s) 62.83 TOp width (ft) 11.00 31.45 20.38
9.65 ~~~~. I/~~Pt~f(m 4.94 11.94 5.lS
~~~v~h~o~~ih (~m 4.75 2.35 4.75 2.50
21910.4 conl/. (cfs) 1281.6 17896.8 2732.0
Length wtd. (ft) 464.91 Wetted per. (ft~ 11.99 31.45 20.93
MinchEl (ft) 7834.89 shear (lb/sq ft 1.33 2.94 1.50
Alpha 1.)0 Stream Power (11ft s) 6.58 35.04 8.04
FrctnlOSS ~m 5.19 Cum volume (acre-ft) 14.64 65.<3 10.63
C &. E lOSS 0.03 Cum SA (acres) 5.65 15.81 4.8S

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warning:

The energy equatian could not be balanced within the specified num berofiterations The
Ilrograll\ used critica.l deptll f~r tile water surface a.nd continued on with the calculatians.
:::~~ s e~:?r n~~~~t:a~h~r~:~:r f~~a~dai~i ~~afO c~o~~. s~~ii~~~. the current and previ ous cross section.
During tne standard nep iterations. when the assumed water surface wu set e9ual to critical
depth, the calculated water surface came back below critical depth. This indlcates 1:hat there is
not a valid subcritical answer. The proqram defaulted to critical depth.

(ROSS SECTION OUTPUT ProfilellO-year

warning:

warning:

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~~~'H~~~V(~g)
W.S. Elev (ft)
critw.S. (ft)
E.G. slope (ft/ft)
QToul (cfs)
TOp width (ft)

7840.55
1.67
7838.88
7838.88
0.010863
1657.00
58.22

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Element
wt. n-IIal.
Reachlen. (ft)
Flow Area (sq fe)
:1~: ~~~srt)
TOp Width (ft)

left OS
0.050
465.25
18.0f>
18.06
81.87
9.39

Channel
O.ll35
464.83
125.31
125.31
1393.55
31.45

Rig~~5~s
465.06
36.43
36.43
181.59
17.38

page 35