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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BankSta;Left Rlght
624.6364527
Ineffective Flow num-
Sta L SU R Elev
o 4Z57933.S7
U~ 544.'93 7934.3
664.03 9007934.18
9002005.4 8000

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CROSS SECTION OUTPUT
ee~' H~~~V (~W
W.~. Elev (ft)
Crlt 101.5. (ft)
E.G. slope (ft/ft)
Q Total (cfs)
Top width (ft)
Vel Total (ft/s)
MaxchlOpth(ft}
Conv.Total Ccfs)
Length Wed. (ft)
"''in eh El (ft)
Alpha
FrctnLoss(ft)
C&ELoss(ft)

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Lengths: Left Channel
522.08532.15
.
permanent
,
,
,
,

Right
493.21

ProfilellOO-year
7934.46 Element
0.1& We.n-Val.
7934.28 Reach Len. (ft)
7934.19 Flow Area (sq fe)
0.002926 Area (sq ft)
1691.00 Flow (cfs)
1437.89 TOp wi deh ~ft)
~:n ~;~r.v~~Pthf~m
31259.5 Cony. (cfs)
511.98 wetted Per. (fel
7930.15 sheu(lbjsqft
2.53 StreoWl power (11ft s)
1.41 cumv"lume(acre-ft)
0.00 cum SA (acru)

Coeffcontr.
"

LeftOB
0.050
522.08
350.76
1501.73
523.77
540.93
1.49
0.83
9682.3
423.17
IL15
0.23
89.52
39.H

crystalRiverrep
Expan.
"

channel
0.035
532.15
82.79
82.79
479.95
20.64
5.80
4.01
8872.3
20.64
O.B
4.25
89.03
22.07

Rig~~5gB
493.21
348.32
1659.75
687.28
876.32
1.97
1.37
12704.9
256.16
0.25
0.49
69.85
36.75

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warning: Oivided flow computed for this cross-section.
warning: The energJ( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
ThismaYlndiclItetheneedforadditionlllcrasssectians.
Note: Multiple critical depths were found at this location. The critical depth with the lowest, valid, water
surfllce was used.

CROSS SECTION OUTPUT profile #Floodway
~~~'H~l~v(}g) 7935.54 Element LeftOB Channel Ri8~65gB
0.32 wt. n~val. 0.050 0.035
~~~t ~~~~ ~m 7935.23 Reacl>len. (ft) 522.08 532.15 493.21
7934.41 Flow Area (sqft) 366.58 102.43 13.32.
E.G. slope (ft/ft) 0.002.678 :~~ ~~lsrt) 366.58 102.43 13.32
QTotlll (efs) 1691.00 1005.34 654.69 30.97
~~~ ~~~i~ ~~~~S) 175.00 Top wi dth ~ft) 149.63 20.64 4.73
3.51 A~l Vel. ft/S~ 2.74 6.39 2..32
Max chl opth (ft~ 5.08 Hyr.oepth(ft 2.45 4.96 2.82.
Conv. Total ~CfS 32677.5 conv. (cfs) 19427.6 12.651.5 598.4
Lengtl> wtd. ft) 519.30 wetted per. (ft~ 153.93 20.64 7.17
MinchEl (ft) 7930.15 shear {lb/sqft 0.40 0.83 O.H
Alpha 1.66 StrelllllPower(l/fts) 1.09 5.30 0.72.
~r~t~ ~~~~ ~m 1.44 Cum volume (acre-ft) 26.29 97.44 2.2.20
0.01 CumS.A.(acres) 9.52 22.07 8.04

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=:~~~~g; i~~ ~~~~~J( si'~~~o~a~agr~~t~~ ~hi~n~~~ f~rM~~l ~~. d~~~~~e~h~l>~r~~~~:~t d:~~h p~:~f~~:t~~~~s section.
ThislllaYlndicate the need for additional cras5 sections.

CROSS SECTtOH OUTPIJT Profilt#lO-year
~~~. H~lr (}g> 7934.32 Element LeftOB Channel Rig~65gB
0.13 w<, n-val. 0.050 0.035
~~~t ~~~~ ~m 7934.19 ReacllLen. (ft) 522.08 532..15 493.21
7934.19 Flow Area (sq ft) 314.03 80.98 325.05
E.G. slope (ft/ft) 0.002.079 Area ~s~ ft) 1454.63 80.98 1583.91
Q lotal (ds) 1284.00 Flow c s) 375.2.4 389.92 518.85
~~~ ~~~~~ m3s) 1416.83 TOpWldth(ft} 536.98 20.64 859.21
1.78 ~~9;.. V~~Pt~f(m 1.19 4.81 1.59
Max chl Opth (ft~ 4.04 0.75 3.92 1.28
Conv. lata 1 ~Cfs 28163.4 Cony. (cfs) 82.30.5 8552.5 11380.4
Length Wtel. ft) 512..2.4 wetted Per. (ft~ 420.83 20.64 256.16
MinchEl (ft) 7930.15 Shear (lb/sqft 0.10 0.51 0.17
Alpha 2.67 Streaml'ower(l/fts) 0.12 2..45 0.26
Frctn LOSS (ft~ 1.12 Cum volume (acre-ft) 68.79 75.29 51.08
C&ELoss(ft 0.00 cum SA (acres) 35.88 22.07 30.39

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Warning: The energy equation could not be balanced within the specified number of iteratians. The
Warning: gi~~d:d ~r~~ ~~~~~~:~ ~~~t~h;~rc~~~s~:~~~i~~:face and continued on with the calculations.
warning: The energJ( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need far additional cross sections.
I Warning; During the standard stet> iterations, when the assumed water surh.ce was set equal to critical
depth, the calculated water surhce cllllle back below critical depth. This indlcates that there is
notavalidsubcriticalanswer. Thepr~amdefaultedtocriticaldepth.
~ ~ote.:~~~~~~~"w~;i~;;~deptlts..we..t.1l...foUl\!L4t...' ..lo~~ha._=i-~deptl>-witl>~t~~1+d-;-"~,,,

CROSS SECTtON OUTPUT profih N50-year

Oivided flow computed for this cross-section.
~~~s e~:?~ n~~~:t:a~h~r~:~~r f~~a~d~;~i~~a fOc~o~~' s~~~i~~~. the current and previ ous cross section.
During the standard step iterations, when the assumed water surface was set equal to critical
<lellth the calculated w"-ter s\lrfaaca~hackb1!lcwcritit.al d1!ptl1. This indlcates that there is
not a'valid subcritlCal answer. The pr09ram defaulted to critical depth.
iolultiple critical depths were found at this location. The critic,,-l depth with the lowest, valid, water
surface was used.
CROSS SECTION OLlTPUT Profi1e'SOO-year

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~~r' H~~~v (}g>
W.~. nev (ft)
crltw.s. (ft)
E.G. slope (ft/ft)
QTotal (cfs)
~~~ ~~~~~ ~:~~S)
~~~v~hia~~ih(~m
Lengthwtd. (ft)
MinChEl (ft)
Alpha
?lt~ ~~~~ m~

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Warning:
warning:

warning:

Note:

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~~~. H~l~v (}W
W.S. Elev (ft)
crit W.S. (ft)
E.G. slope (ft/ft)
QTotal (cf$)
~~~ ~~~i~ H~~s)
loIaxchlopth(ft)
conv.Total (cfs)
LengthWtd. (ft)
MinChEl (ft)

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7934.39
0.20
7934.19
7934.19
0.003127
1575.00
1416.83
2.18
4.04
2.8163.4
S12.11
7930.15
2..67
1.44
0.00

7934.50
0.11
7934.39
7934.19
0.002020
1950.00
1460.88
1.82.
4.24
43388.2
512.69
7930.15

Element
wt.n-val.
Reach ~en. (ft)
Flow Area (sq ft)
Area (Sq ft)
Flow (Cfs)
lop wHlth (ft)
Avg.vel. (ft/s)
liydr.oepth(ft)
Canv. (cfs)
~~~~~d (j~/sq (m
Stream Power (lb/ft 5)
Cum volume (acre-ft)
Cum SA (acres)

Element
Wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)
Area (sq ft)
Flow (cfs)
Top width (ft)
Avg.vel. (ft/s)
Hydr. oeJlth (ft)
COny. (cfs)
~~~~~d (~~/sq (m

Left 00
0.050
522.08
314.03
1454.63
450.28
536.98
1.47
0.75
8230.5
420.83
0.15
0.21
8L31
38.31

LeftOB
0.050
522.08
611.39
1562.07
882.07
542.29
1.44
1.13
19626.4
545.21
0.14

Channel
0.035
532..15
80.98
80.98
478.28
20.64
5.91
3.92
8552.5
20.64
0.77
4.52
85.2.0
22.07

Channel
0.035
532.tS
85.08
8S.08
417.37
20.64
4.91
4.12
92.86.5
20.64
0.52

Rig~65gB
493.21
326.05
1583.91
636.44
859.21
1.9S
1.28
11380.4
256.16
0.25
0.49
63.75
35.15

Rig~65gB
493.21
376.67
17S8.S2
650.56
897.95
1.73
1.48
14475.2
256.16
0.19

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