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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Warning:
Warn; ng:
Warn; ng:

CrystalR;ver. rep
additional cross sections.
The conveyance ratio (upstream conveyance divided by downstream conveyance) ;s less than
0.7 or greater than 1.4. This may indicate the need for additional cross sections.
The energ'f 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.

~~~~~~ ~~: ~~i~~i~~edt:~t~~e~:~}:~: I c=nb~~~ b:l:e~r~~f~~ 1 S~~::h~ ~i:efnd1~::e~o th~~ t~h:~e is
~ot a valid subcr~tical answer. The program defaulted to critical depth.

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CROSS SECTION OUTPUT

~~~. H~l~v (~g>

w.~. Elev (ft)
Crlt W.s. (ft)
E.G. Slope (ft/ft)
Q Total (ds)
TOp W; dth (ft)
Vel Total (ft/s)
Max chl Dpth (ft)
Conv. Total (Cf5)
Length Wtd. (ft)
M;n ch El (ft)
Alpha
Fretn Loss eft)
C " E Loss (ft)

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Prof; 1 e #500-year

7943.21 El ament
1.32 Wt. n-val.
7941.88 Reach Len. (ft)
7941. 86 Flow Area (sq ft)
0.009519 Area (sq ft)
1950.00 Flow (cfs)
1907.11 TOp W;dth ~ft)

Ug ~9' V~l'th~~g
19986. 7 con~: (~~S)
849.80 wetted Per. (ft~
7938.13 shear (lb/sq ft
1. 79 Stream Power (lIft s)
6. SO Cum volume (acre-ft)
0.27 Cum SA (acres)

Left 08
0.060
894.82
93.89
104.54
222.82
116.85
2.37
0.94
2283.8
100.49
0.56
1.32
118 .19
51.77

Channel
0.035
849. 72
163.48
163.48
1635.62
43.55
10.00
3.75
16764.4
43.55
2.23
22.32
105.09
25.42

R;8~~~B

700.27
25.37
7875.52
91.56
1746.71
3.61
1.90
938.5
13.89
1.09
3.92
158.07
61.19

warning:
Warn; ng:

Divided flow com~uted for this cross-section.
The velocity heai:l has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections.
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.

CROSS SECTION

INPUT
Description:
Station Elevation Data num= 161
Sta Elev Sta Elev Sta flev Sta flev Sta flev
07970.81 .997970.38 2.32 7969.79 6.03 7968.12 12.57965.22
13.27 7964.88 19.2 7962.23 21.19 7961.39 22.68 7960.75 32.B6 7956.43
51.73 7948.3 53.22 7947.67 B.71 7947.21 53.837947.13 62.517941.77
63.4 7941.2 67.217938.66 72.047938.65 76.887937.93 83.767936.48
84.997936.14 87.34 7935.7 89.567935.81 102.027936.23 104.12 7936.33
113.04 7936.62 124.47 7936.63 127.16 7936.62 134.65 7936.5 155.017936.52
175.377936.15 177.45 7936.16 195.73 7936.16 205.917936.23 215.167936.19
226.27 7936.25 236.45 7935.96 241.16 7935.79 245.35 7935.65 248.5 7935.64
256.81 7935.32 258.14 79)5.26 260.92 7935.18 267.12 7934.86 271.11 7934.69
326.74 7934.69 327.82 7934.86 333.24 7935.78 336.13 7935.78 338.24 7935.73
340.87 7935.7 348.427935.76 356.217935.65 358.667935.63 362.477935.73
369.11 7935.84 378.527936.08 386.557936.06 389.997936.04 394.577936.07
400.44 7936.02 402.6 79]6.03 409.8 7936.08 418.66 7936.17 421.32 7936.17
431.77 7936.29 434.71 7936.33 442.21 7936.38 458.797936.68 463.17936.75
466.82 7936.73 473.5479.36.54 476.837936.44 479.547936.37 481.79 7935.9
483.17 7935.59 485.13 7935.21 487.647934.69 496.697934.69 503.477935.47
504.877935.56 507.37 7935.8 507.987935.86 514.65 7935.98 524.387935.64
526.45 7935.58 527.4 7935.46 534.73 7934.86 536.43 7934.68 544.29 7935.13
546.64 7935.26 548.56 7935.11 557.8 7934.29 575.87 7934.15 602.66 7934
655 7934 728.69 7934 733.27935.79 734.25 7936.1 735.457936.39
737.847936.16 740.647936.02 746.267936.03 752.467935.85 757.057935.65
764.25 7935.64 771.167936.25 775.22 7936.25 778.66 7936.23 786.57 7936.17
790.187936.31 792.237936.38 799.767936.66 809.167936.98 811.417937.16
817.57 7936.9 821.747937.06 824.047937.13 831.917937.14 842.47937.28
847.26 7937.3 851.667937.34 853 7942.49 9517939.44 1052 7938.3
1155 7938.43 1185 7941.4 1257 7938.24 1362 7938.13 1466 7937.96
15687938.25 1621.3 7939.9 1623.97937.55 1647.77937.58 1650.5 7940.01
1668 7939.49 1770 7939.5 1874 7939.29 1975 7939.212083.52 7939.24
2086.387939.282106.167939.45 2116.67939.18 2118.67939.252121.397939.33
2128.01 7939.53 2129.66 7939.72 2132.18 7939.76 2134.05 7939.862140.94 7940.3
2160.47939.892164.05 7941.98 2174.05 7947.69 2177.37 7949.692183.467953.23
2184.54 7954.12 2185.3 7954.74 2188.87957.512194.05 7961.86 2200.67965.88
2204.32 7968.26

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warning:

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RIVER: Crystal
REACH: Marble

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Manning's n values
Sta n val $ta
o .06 87.34

RS: 21874

nUIIl=
n val
.05

5
Sta
557.8

n val Sta
.035 728.69

Bank sta:Left Right Lengths: left Channel Right
557.8 728.69 552.36 570.84 551.05
Ineffective Flow nurn- 2
Sta L Sta R Elev Permanent
o 463.1 7937 T
735 2204.32 7941. 72 T

CROSS SECTION OUTPUT Profi 1 e #100-year
~~~. H~l~v (~W 7936.40 Element Left DB channel R; 8~~5g8
0.28 Wt. n-val. 0.050 0.035
w.~. Elev ~ft~ 7936.12 Reach Len. (ft) 552.36 570.84 551.05
Crlt w.s. ft Flow Area (sq ft) 69.17 356.57 5.72
E.G. slope (ft/ft) 0.003984 ~~~: ~~Mt) 201.13 356.57 13.94
Q Total (cfs) 1691. 00 120. 39 1560.27 10.34
TO~ W; dth ~ft) 481. 53 TOp W; dth (ft) 273.90 170.89 36.74
Ve Total ft/s) 3.92 ~~9~. V~~j,t~f!~g 1.74 4.38 1.81
Max ch 1 Dpth (ft) 2.12 0.90 2.09 1.01
Conv. Total (cfs) 26790.2 Conv. (cfs) 1907.3 24719.0 163.9
Length wtd. (ft) 563.24 wetted Per. (ft~ 77.39 170.89 6.04
Min ch El (ft) 7934.00 shear (lb/sq ft 0.22 0.52 0.24
Alpha 1.17 Stream Power (11ft s) 0.39 2.27 0.43
Fretn loss (ft) 1.91 Cum volume (aere-ft) 100.32 91.91 80.44
C " E Loss (ft) 0.03 Cum SA (acres) 44.48 23.32 42.53

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n val Sta
.05 1257

coeff Contr.
.1

n val
o

Expan.
.3

warning: Divided flow computed for this cross-section.
Warning: The energ!( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndieate the need for additional cross sections.

CROSS SECTION OUTPUT Profile #Floodway

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~~~'H~l~v(~W

w.~. Elev (ft)
Crlt W.S. (ft)
E.G. Slope (ft/ft)
Q Total (cfs)
TOp W; dth (ft)
Vel Total (ft/s)
Max chI Dpth (ft)
conv. Total (cfs)
Length Wtd. (ft)
Min ch El (ft)
Alpha
Fretn loss eft)
C &, E Loss eft)

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7936.87
0.20
7936.67

0.002046
1691.00
185.00
3.56
2.67
37381. 7
564.92
7934.00
1.04
1.32
0.01

el ement
Wt. n-val.
Reach Len. (ft:)
Flow Area (sq ft)
~~~ f~Mt)

TOp W1 dth (ft)
Avg. vel. (ft/s) ,
Hydr. Depth (ft)
Conv. (cfs)
wetted Per. (ft~
shear (lb/sq ft
Stre... Power (11ft s)
Cum volume (aere-ft)
Cum SA (acres)

left 08
0.050
552.36
15.84
15.84
29.92
7.80
1.89
2.03
661. 3
9.52
0.21
0.40
28.72
10.52

C~~3;~1 Ri8~~SgB

570.84 551.05
449.78 9.11
449.78 9.11
1646.64 14.45
170.89 6.31
3.66 1.59
2.63 1.44
36401.0 319.4
170.89 7.10
0.34 0.16
1.23 0.26
101.06 22.34
23.32 8.11

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