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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"".5. Elev (ft)
crit "".5. eft)
E.G. Slope (ft/ft)
Q Total (cfs)
Top width (Ft)
Vel Total (ft/s)
MaxchlOpth(ft)
conv.Total Cds)
L~1'l9th wtd. (ft)
10\10 en El (ft)
Alpha
FrctnLoss(ft)
C & E loss (ft)

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Warning:
warning:
Note:

The conveyance ratio (upstream cOl'lveyance divided bydownstrealll conveyance) is less than
0.7 orllreater than 1.4. This lIlayindicate the need foradditianal cross sections.
f~~s e~~?rn~~~~t:a~h~r~:~~r f~~a~d~;~i~~afO~~o~~' s~~~~~. the current and previous cross section.
Multiple critical depths were found at this location. The critical depth with the lowest, valid,
surface was used.

water

CROSS SECTION OUTPUT profilelllO-year
~eY' H~~~V ($g) 7932.64 Element LeftOB Channel Rig~8sgB
0.18 Wt. o-va1. O.OSO O.OlS
w.~. Elev ~ft~ 7932.46 Reach Len. (ft) 739.92 866.01 800.58
Cnt W.S. ft 7931.39 FlowAreaCsqft) 135.77 80.83 241.88
E.G. Slope (ftjft) 0.002312 ~~~: 1~~srt) 913.03 80.83 301.69
Q Total (cfs) 1284.00 251.89 399.25 631.86
~~~ ~~~~ ~n~S) 630.44 Top width ~ft) 449.45 21.47 159.52
LBO Iwg. vel. ftfS1 1.Sf> 4.'94 2.61
MaK chl Dpth (ft~ 4.25 Hydr. Del!th (ft 1.50 3.76 2.51
Conv. Total ~cfs 26706.5 COny. (cfs) 5260.0 8304.3 13142.3
Lengthwtd. ft) 835.32 wetted per. (ft~ 91.22 21.47 97.84
Min ch E1 (ft) 7928.6) shear (lbjsqft 0.21 0.54 0.36
Alpha 1.48 strean Power (1 jfts) 0.40 2.68 0.93
Fretn LOSS ~ttj 2.34 (um volume (acre-ft) 54.60 74.30 40.41
C &, E Loss ft 0.01 CUIIISA(acres) 29.97 21.81 24.62

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War"ning:
warning:
Note:

Divided 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 1ndicate the need for additional cross sections.
Multiple critical depths were found at this location. The critical depth with the lowest, valid, water
surface was used.

CROSS SECTrONDUTPUT profile'50-year
~ef. H~~~v ($W 7932.94 Element Left OS ctlannel Rig~~5gB
0.21 ~. n-val. 0.050 0.035
W.S. Elev ~ft~ 7932.73 RnchLen. (ft) 739.92 866.01 800.58
Crit W.S. ft 7931.75 Flow Area (sqft) 162.87 86.70 268.34
E.G.slo\le(ft/ft) 0.002528 Aru. ~s~ ft) 1018..48 86.70 346.20
Q Total (cfs) 1575.00 Flow cs) 323.74 469.B 781.93
~~~ ~~~~ m~S) 658.01 Top Width ~ft) 465.49 21.41 171.05
1.04 ....v~. vel. ftjSj 1.99 5.41 2.91
Max ehl Dpttl {ft~ 4.53 Hyr.Depth(ft 1.54 4.04 2.76
conv. Totlll ~Cfs 31322.6 cony. (cfs) 6438.4 9333.7 15550.5
Lengttl.....td. ft} 830.53 Wetted Per. (ft~ 106.16 21.47 98.54
MinetlEl (ft) 7928.65 shear(lbjsqft 0.24 0.64 0.43
Alpha 1.49 stream Power (l Ifts) 0.48 3.45 1.25
Frctn LOSS ~ft~ 1.83 cUrn volume (acre-ft) 68.37 84.18 52.82
C&ELoss ft 0.00 cum SA (acres) 32.30 21.81 29.32

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7933.68
7932.10
0.002873
1691.00
90.95-
4.52
5.04
31548.6
843.38
79211.1';5
1.30
1.56
0.06

ReactlLen. (ft)
Flow Aru. (sq ft)
Area (sq ft)
Flow ~cfs)
Top Width (ft)
Avg.Vel. (ftjs)
Hydr. Depttl (ft)
cony. (cfs)
Wetted per. (ftl
sheu (lbJsq ft
stream Power (1 jft s)
Cum volume (acre-ft)
CumS4(acres)

739.92
65.26
65.26
206.51
20.92
3.16
3.12
3852.7
23.31
0.50
1.59
23.70
8.50

crystalRiver.rep
866.01 800.58
107.21 201.49
107.21 201.49
712.78 771.72
21.47 48.56
6.65 3.83
4.99 4.15
13298.1 14397.8
21.41 54.04
0.% \J.61
5.95 2.56
96.16 20.98
21.81 7.74

Warning: Dividedflowco",putedforthiscross-sectioo.
Warning; The energy loss was greater than 1.0 ft (0.3 m). between ttle current and previous cross section.
ThismaYlndiCiltettleneedforadditionalcrosssec:tlonS
Note: Multiple craical depths were found at ttlis location. The critical depth with the lowest, valid, water
surface was used.
CROSS SECTION OUTPUT profile ~500-year

ee?' H~~~v (~g)
-""'.S. nev (ft)
eritw.s. (ft)
E.G. slope (ftjft)
QToul Ccfs)
~~~ ~~~~~ ~t~~S)
MaxchlDpttlCft)
cony. T~~~l ~~g)
MinChEl (ft)
Alpha
~rit~ ~~~~ ~m

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warning:
warnin9:
warning:
Note:

Divided flow computed for this cross-section.
The conveyance ratio (upstreamconveyancedividedbydownstre Mconveyance) is less than
0.7 or greater than 1.4. Thismayindicatetheneedforadditionalcrosssenions.
Ttleenergl;" loss was greater than 1.0 ft (0.3m). between the current and preVlOUS cross section.
This mllY lndicate the need for additional cross sections.
Multiple cntical depths were found at this location. The critical depth with the lowest. valid,
surface was used.

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CROSS SECTION

RIVER: Crystal
REACH: Marble

7933.36 Element
0.22 wt.n-va1.
1933.14 lIellchLen. (ft)
7931.98 Flow Area (sqft)
0.002178 Area (sqft)
1950.00 Flow ~cfs)
695.55 Top Wldth ~ft)
~:~~ ~;~r.v~~Pthf~m
39988.2 conv. (cfs)
O~n u-~~r~-fftl
7928.65 shear(lbjsqft
1.41 Stream Power (1 jft s)
1.14 Cum volume (lI.cre-ft)
0.03 Cum SA (acres)

RS: 19905

INPUT
Description:
Station Elevation Data nurn..
sea Elev sta [lev
07962.75 l.667961.82
14.627957.91 23.667954.48
34.637951.69 35.351951.45
55.617947.57 64.581947.17
83.667943.6 84.637943.41
104.627937.41104.951937.17
124.627933.11]3.667932.14
144.497931.53 l'i1.97929.6
184.627928.89193.667929.13
222.97929.59225.017929.61
260.787929.45267.387929.6
2&0.637925-.95- 292.5-17926.09
321.387926.93323.511927.05
343.27927.59344.377927.67
365.87921.51 369.187927.46
388.287930.56390.417930.5>
406.867930.67410.717930.72
430.717931.49434.021931.58
464.027933.18470.717933.54
504.027935.36520.717935.91

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Sta Elev
4.627961.51
24.627954.16
42.587948.51
61.047947.08
81.097943.3
109.567933.88
134.627932.69
154.077929.48
203.667929.36
238.057929.62
268.997929.67
310.61926.21
328.967927.22
350.827927.56
378.237929.81
397.137930.44
414.027930.88
440.717931.93
480.717934.06
524.027936.06

Sta [lev
6.797960.87
32.357952.68
B.667947.69
70.487946.3
95.047942.69
113.87931.66
139.67932.5
163.661928.93
213.667929.51
253.27929.49
273.967930.1
313.137':126.46
334.467927.54
3551927.37
379.527930.18
400.12 7930.;
420.711930.97
444.027932.17
484.027934.17
540.717936.28

LeftOB Channel
0.050 0.035
739.92 866.01
206.22 95.53
1230.06 95.53
465.26 B4.98
466.49 21.41
2.26 5.60
1.96 4.45
9543.1 10970.7
lGS.-l6--~i'
0.29 0.66
0.65 3.70
87.55 96.29
31.24 21.81

Rig~~5gB
800.58
308.46
422.59
949.76
207.59
1.08
3,15
19476.5
33.68
0.46
1.42
71.14
34.76

water

sta Elev
13.627958.27
33.647952.l'i
'i4.637947.62
74.637945.33
97.477942.51
114.627933.61
141.037932.42
173.667928.89
220.547929.58
257.847929.46
278.617927.08
H6.S'979Hd.5
336.537921.61
359.37927.56
380.517930.48
404.717930.62
424.027931.15
460.717932.94
500.717935.27
544.027936.44

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