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

554.02 7936.63 560.71 7936.77 564.02 7936.85 590.71 7937.56 594.02 793~14talRive~.rep
600.71 7937.82 604.02 7937.84 620.71 7938.28 624.027938.31 630.717938.39
634.027938.44 640.71 7938.52 644.027938.63 650.71 7938.99 660.71 7939.51
670.71 7939.84 674.02 7940 680.71 7940.22 684.02 7940.26 700.71 7940.7
704.02 7940.77 720.71 7940.88 724.02 7941.01 740.71 7941.35 744.02 7941.52
750.717942.01 754.02 7942.24 760.71 7942.73 764.02 7942.85 770.71 7942.99
780.71 7943.18 784.02 7943.34 790.71 7943.6 794.02 7943.74 800.71 7944
804.02 7944.2 810.71 7944.59 814.02 7944.68 820.71 7945.07 824.02 7945.29
840.71 7945.73 850.71 7945.86 854.02 7945.91 864.02 7946.04 880.71 7946.15
884.02 7946.28 900.71 7946.83 910.71 7947.23 914.02 7947.29 920.71 7947.55
924.02 7947.73 940.71 7948.39 944.02 7948.42 954.02 7948.61 960.71 7948.75
964.02 7948.83 972.38 7949.1 977.617949.51 980.71 7949.78 984.027949.94
990.71 7950.19 994.02 7950.42 1000.71 7950.62 1004.02 7950.711010.71 7951.11
1014.027951.231020.71 7951.62 1030.71 7951.89 1034.02 79521040.71 7952.17
1044.02 7952.311054.02 7952.83 1060.71 7953.19 1064.02 7953.271070.71 7953.45
1074.02 7953.67 1084.02 7953.941090.71 7954.46 1094.02 7954.73 1100.71 7955.25
1104.02 7955.321110.71 7955.45 1114.02 7955.61120.71 7955.73 1124.02 7955.86
1140.717956.42 1144.02 7956.52 1145.91 7956.65

Manning' 5 n values "um"" 5
Sta n val sta n val Sta oVal Sta oval Sta n val
0 .06 139.6 .05 280.63 .035 310.6 .05 369.18 .06
Bank sta: Left Ri ght lengths: Left Channel Ri ght coeff Contr. Expan.
280.63 369.18 533.84 544.56 485.44 .1 .3
Ineffective Flow num- 1
Sta L Sta R Elev Permanent
0 273.96 7930.1 T
. CROSS SECTION OUTPUT Prof; 1 e #100-year
~;,~. H~~~v (m) 7931.46 Element Left 08 channel Ri 8~~6gB
0.18 Wt. n-val. 0.050 0.042
w.s. Elev ~ft~ 7931.28 Reach Len. (ft) 533.84 544. 56 485.44
crit w.s. ft Flow Area (sq ft) 169.80 387.70 53.39
E.G. Slope (ft/ft) 0.001472 Area ~s~ ft) 262.51 387.70 53.39
Q Total (cfs) 1691. 00 Flow C 5) 223.77 1419.10 48.12
TO~ wi dth ~ ft) 281.10 Top wi dth ~ft) 135.18 88.55 57.37
Ve Total ft/s) 2.77 AVS' vel. ft/s~ 1.32 3.66 0.90
Max Chl Dpth (ft~ 5.33 Hy r. Depth (ft 1.26 4.38 0.93
conv.Total ~cfs 44077.8 Conv. (cfs) 5832.9 36990. 5 1254.4
Length wtd. ft) 531. 63 wetted Per. (ft~ 136.63 88.60 57.79
Min ch El (ft) 7925.95 Shear (lb/sq ft 0.11 0.40 0.08
Alpha 1. 50 Stream Power (11ft 5) 0.15 1.47 0.08
Fret" Loss ~ft~ 0.15 Cum volume (acre-ft) 62.61 83.25 54.58
C & E Loss ft 0.05 Cum SA (acres) 28.18 20.72 28.60

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warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than
0.7 or greater than 1.4. This may indicate the need for additional cross sections.

CROSS SECTION OUTPUT Profi 1 e #Floodway

CROSS SECTION OUTPUT profi 1 e #10-year
~;,~. H~~~v (fg' 7930.27 Element Left 08 channel Ri8~~~B
0.31 wt. n-va1. 0.050 0.041
W.S. Elev (ft) 7929.96 Reach Len. (ft) 533.84 544.56 485.44
Cdt w.s. (ft) Flow Area (sq ft) 13.34 270.83 12.02
E.G. slope (ft/ft) 0.003475 Area ~s~ ft) 87.58 270.83 12.02
Q Total (cfs) 1284.00 Flow c s) 34.00 1230.02 19.99
TO~ wi dth ~ft) 226.38 Tap width ~ft) 128.26 88.55 9.57
Ve Total ft/s) 4.34 AVS' vel. ft/s~ 2.55 4.54 1.66
Max ch 1 Dpth (ft~ 4.01 HY r. Depth (ft 2.07 3.06 1.26
Conv. Total ~Cfs 21780. 5 Conv. (cfs) 576.7 20864. 7 339.0
Length wtd. ft) 533.14 wetted Per. (ft~ 7.60 88.60 9.89
Min ch El (ft) 7925.95 Shear (lb/sq ft 0.38 0.66 0.26
Alpha 1.06 Stream Power (1 1ft s) 0.97 3.01 0.44
Fretn Loss ~m 0.27 Cum volume (acre-ft) 46.10 70.80 37.53
C & E Loss 0.08 Cum SA (acres) 25.06 20.72 23.07
warning: Diyided flow computed for this cross-section.
warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than
0.1 or greater than 1.4. This may indicate the neeif for additional cross sections.
CROSS SECTION OUTPUT Profi 1 e 'SO-year
~;, r' H~~~v (f~j) 7931.12 Element Left DB channe 1 Ri8~~6gB
0.22 Wt. "-val. 0.050 0.042
~r~ t :~ ~~ ffg 7930.90 Reach Len. (ft) 533.84 544. 56 485.44
Flow Area (sq ft) 118.57 353.72 32.94
E.G. Slope (ft/ft) 0.001936 :f~: ~~~srt) . 210.91 353.72 32.94
Q Total (cfs) 1575.00 142.11 1404.31 28.58
~~~ ~~~~ ~mS) 268.21 Tap wi dth ~ft) 133.70 88.55 45.96
3.12 AVS' vel. ft/s~ 1.20 3.97 0.87
Max Ch 1 Dpth (ft) 4.94 Hy r. Depth (ft 0.89 3.99 0.72
Conv. Total ~Cfs) 35796.8 Cony. (cfs) 3230.0 31917.4 649.5
Length wtd. ft) 532.28 wetted Per. (ft~ 135.11 88.60 46.37
Min ch El (ft) 7925.95 shear (1 b/sq ft 0.11 0.48 0.09
Alpha 1.46 Stream Power (11ft s) 0.13 1.92 0.07
Frctn Loss m~ 0.18 Cum vol urne (acre-ft) 57.76 79.80 49.33
C &- E Loss 0.06 Cum SA (acres) 27.21 20.72 27.33

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M' H~~~v (fg'

W.S. Elev (ft)
crit W.S. (ft)
E.G. slope (ft/ft)
Q Total (cfs)

~~~ ~~~~ Hi}s)

Max ch 1 Dpth (ft)
Cony. Total (cfs)
Length wtd. (ft)
Mi n Ch El (ft)
Alpha
Fretn Loss (ft)
C & E LOSS (ft)

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7932.47
0.20
7932.27

0.001292
1691. 00
88.55
3.56
6.32
47044.7
535.00
7925.95
1.00
0.63
0.01

El ement
Wt. n-Va 1.
Reach Len. (ft)
Flow Area (sq ft)
Area (sq ft)
Flow (cfs)
Tap wi dth (ft)
Avg. vel. (ft/s)
Hydr. Depth (ft)
Cony. (cfs)
wetted Per. (ft~
shear (lb/sq ft
Streall Power (11ft 5)
Cum vol urne (acre-ft)
Cum SA (acres)

Left DB channel
0.043
533.84 544.56
475.60
475.60
1691.00
88.55
3.56
5.37
47044.7
99.73
0.38
1.37
23.15 90.37
8.32 20.72

Right DB
485.44

19.13
7.30

Warning: The conveyance ratio (upstream conveyance divided by downstreiUII conveyance) is less than
0.7 or greater than 1.4. This may indicate the need for additional cross sections.

CROSS SECTION OUTPUT Profi 1 e #500-year

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~~~. H~~~v (}g)

W.S. Elev (ft)
crit W.S. (ft)
E.G. Slope (ft/ft)
Q Total (cfs)
Top wi dth (ft)
vel Total (ft/s)
Max ch 1 Dpth (ft)
Cony . Total (cfs)
Length wtd. (ft)
Mi n ch El (ft)

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7932.19
0.12
7932.07

0.000910 '
1950.00
300.18
2.32
6.12
64631.5
530.32
7925.95

El ement
Wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)

:~~: ~~Mt)

Top Wldth (ft)
Avg. vel. (ft/s)
Hydr. Depth (ft)
Conv. (cfs)
wetted Per. eft)
Shear (lb/sq ft)

Left DB
0.050
533.84
277 .15
370.10
392.21
138.22
1.42
2.01
12999.6
139.78
0.11

c8~3~~ 1 Ri 3~~6g8
544.56 485.44
457.40 105.35
457.40 105.35
1458.03 99.76
88.55 73.40
3.19 0.95
5.17 1.44
48325.4 3306.5
88.60 73.84
0.29 0.08
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