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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E.G. US. (ft~
W.s. us. (ft
Q Total (cfs
~, :~1~9M~rS)

wei r Sta Lft (ft)
we, r Sta Rgt (ft)
We; r submerg
wei r Max Depth (ft)
Min E1 weir Flow (ft)
Min E1 Prs (ft)
CeltBEG (ft)
Delta WS (ft)

:: ~~~ e~fa(~~Mt)
Coef of Q
Br Se 1 Method

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7931. 69
7929 .87
2515.00
2515.00

El....nt
E.G. elev ~ft~
W.S. Elev ft.
erit: W.S. ft
Max ch1 Dpth (ft)
v.1 Total (ft/s)
Flow Ar.a (sq ft)
Froude , chl
speci f Fore. (cu ft)
Hydr Depth (ft)
W.P. Total (ft)
Conv. Total (cfs)
TOp wi dth (ft)
Fret" Loss (ft~
C &I E Loss (ft
shear Total (1 Isq ft)
Power Tot.al (lb/ft 5)

crysta1River.rep
Insi de BR us Insi de 81 OS
7931.36 7930.33
7928.54 7928.50
7928.54 7927.18
8.62 8.58
11.35 8.97
221.62 280.25
0.93 0.72
1722.48 1823.59
5.03 5.94
47.62 51.74
27429.1 37141.0
44.03 47.18
0.15 0.03
0.49 0.31
2.44 1.55
27.72 13.91

warning: The energy equation could not be balanced within the specified number of iteranons. The
program used critical depth for the water surface and continued on with the calculations..
warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections..
Warn; ng: ~~~ 5 e~:~g~ n~~~:t:a:h~r~:~ar f~~~d~i ~i :~a fO ~~:~ . s~~~~. the current and previ GUS cross sect; on.
warning: During the standard step iterations, when the assumed water surface was set ~ual to critical
depth, the calculated water surface came back below critical depth. This imhcates that there is
not a valid subcritical answer. The pr!)graJII defaulted to crit-ical depth.
Warning: The velocity head has changed by more than 0.5 ft (0.15 II). This may indicate the need for
additional cross sections.

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CROSS SECTION

RIVER: crystal
REACH: Marble

7935.89
7933.14
1.69
2.75
441.29
11.35

Energy only

RS: 18542

INPUT
Oescri ption:
station El evati on Data nurn-
Sta Elev Sta Elev
o 7958.47 2.97 7956.9
14.86 7948.23 15.37 7947.87
27.51 7940.31 31.83 7937.87
45.52 7935.38 47.83 7935.38
89.4 7919.92 101.2 7920.8
128.34 7932.37 133.71 7933.01
151.957934.76 153.68 7935
215.797934.19 219.047934.22
240.387934.48 257.647934.99
310.957936.58 314.19 7936.7
344.587937.89 392.14 7941.29
418.86 7943.38 425.8 7943.92
448.85 7945.74 454.21 7946.13
472.32 7947.55 476.77947.93

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70
Sta El ev
3.11 7956.83
16.14 7947.35
35.08 7936.75
53.32 7934.88
113. 3 7928.8
135 .05 7933 .18
170.63 7934.92
225.62 7934.24
261.67 7935.03
320.03 7936.85
394.8 7941.47
440.25 7945.08
458.14 7946.47
482.72 7948.37

Sta Elev
4.28 7955.96
23.43 7942.93
38.8 7935.46
55.4 7934.8
123.73 7932.69
136.57 7933.43
204.23 7934.22
233.06 7934.4
289.72 7935.72
327.65 7937.27
398.9 7941.8
445.34 7945.48
463.4 7946.85
505.74 7950.36

Manni ng' 5 n values num- 3
Sta nval Sta nval Sta nval
o .06 78.2 .035 101.2 .06

Bank Sta: ~i:~ ~bl~~ Lengths~6~~f~ Ch4~~~1 4;t~t~

Ineffective Flow num- 2
Sta L Sta R Elev Permanent
o 58 7936.8 T
113.3 510.04 7935.88 T

CROSS SECTION OUTPUT Profile #100-year
~e~' H~~~v (m) 7929.21 El ement Left 08 channel Ri8~~6g8
2.64 wt. n-val. 0.060 0.035
w.s. Elev ~ft~ 7926.57 Reach Len. (ft) 466.19 475.10 491. 64
Crit W.S. ft 7926.57 Flow Area (sq ft) 27.11 142.82 25.17
E.G. Slope (ft/ft) 0.009161 :~~: ~~Mt) 27.11 142.82 25.17
Q Total (cfs) 2181. 00 117.03 1956.81 107.16
~~f ~~~~ ~mS) 41.12 TOp Wldth (ft) 9.40 23.00 8.73
11.18 AV9' vel. (ft/s) 4.32 13.70 4.26
Max ch 1 Dpth (ft~ 6.65 ~~n~: ~~~~~ (ft) 2.88 6.21 2.88
Conv. Total ~cfs 22786.3 1222.7 20444.1 1l19.5
Len9th wtd. ft) 476.16 Wetted Per. (ft~ 11.03 23.07 10.46
Min ch E1 (ft) 7919.92 shear (lb/sq ft 1.41 3.54 1.38
Alpha 1.36 Stream Power (11ft s) 6.07 48.52 5.86
Frctn Loss (ft) 4.53 Cum volume (acre-ft) 40.42 74.40 42.06
C &, E Loss eft} 0.43 Cum SA (acres) 23.18 19.29 24.61

Warning: The energy equation could not be balanced within the specified number of iterations. .The
program used critical depth for the water surface and continued on with the calculations.
warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections.
Warning: The energy 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.
warning: During the standard step iterations, when the assLllled water surface was set e9ua1 to critical
depth, the calculated water surface 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

-7929.21 Element
2.64 wt. n-val.
7926.57 Reach Len. (ft)
7926.57 Flow Area (sq ft)

o i~~~~g~ :~: ~~Mt)

41.12 TOp Wl dth (ft)
11.18 Avg. vel. (ft/s)
6.65 Hydr. De~th (ft)
22786.3 Conv. (cfs)
476.16 wetted Per. (ft~
7919.92 shear (1 b/sq ft
1. 36 Stream Power (1 1ft s)
4.53 Cum volume (acre-ft)
0.43 Cum SA (acres)

The energy equation could not be balanced within the specified number of iterations. The
program used critical depth for the water surface and continued on with the calculations.
The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the nee'd for
additional cross sections.
The energ~ loss was greater than 1.0 ft (0.3 18). between the current and previous cross section.
Thi s may 1 ndi cate the need for addi ti anal cross secti ons.

~~~~~~ ~~: ~~f~~f~~e~t:~t~~e~~~}:~:, c=nb~~~ ~~:e~r~~f~~15~~:~~~ ~i:efn~~::e~Ot~~tt~:;e is
not a valid subcritical answer. The program defaulted to critical depth.
CROSS SECTION OUTPUT Profi 1 e #10-year
M' H~~~v (~g> 792U~ ~~~m~~Sa1.

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~e~' H~~~v (m)

W.~. E1ev (ft)
Crlt W.S. (ft)
E.G. Slope (ft/ft)
Q Total (cfs)
TOp wi dth (ft)
vel Total (ft/s)
Max ch 1 Dpth (ft)
Conv. Total (cf5)
Len9th wtd. (ft)
Min ch E1 (ft)
Alpha
Frctn Loss (ft)
C & E Loss (ft)

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warning:

warning:

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warni ng:
Warni ng:

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Sta Elev
8.19 7953.11
25.52 7941.54
39.22 7935.29
78.2 7920.8
125.347932.29
147.68 7934.46
210.38 7934.38
236.94 7934.42
300.37 7936.13
338.53 7937.54
406.45 7942.38
448.21 7945.69
466.91 7947.16
510.04 7950.79

coeff Contr. Expan.
.3 .5

left OB
0.060
466.19
27.11
27.11
117.03
9.40
4.32
2.88
1222.7
11.03
1.41
6.07
19.61
7.75

Channel
0.035
475.10
142.82
142.82
1956.81
23.00
13.70
6.21
20444.1
23.07
3.54
48.52
80.84
19.29

Ri 8~~~8

491. 64
25.17
25.17
107.16
8.73
4.26
2.88
1119. 5
10.46
1.38
5.86
15.10
6.41

Left 08
0.060

c~~8~~ 1 Ii 8~~~8
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