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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W.!!.Elev(ft)
Crlt\O/.s.(ft)
E.G. slope (ft/ft)
QTotal (cfs)
TopwidthCft)
vel Total (ft/s)
Maxchl0pth(ft)
Cony. Total (cfs)
Length wtd. (ft)
MinchEl (ft)
Alpha
FrctnLoss(ft)
C & E Loss (ft)

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7925.58
7925.58
0.009842
1657.00
38.00
10.64
5.66
16702.8
476.07
7919.92
1.30
4.98
0.34

Reach Len. (ft)
Flow Arell (sq fe)
AreaJ'l '"
Flow I;: 5)
Top dth(ft)
Avg.vel. (ftfs)
Hydr.oepth(ft)
conv.(cfs)
Wetted Per. Crt!
shear (lbjsq ft
str..amPower(l/fts)
cum volume (acre-ft)
cum SA (acres)

466.19
18.57
18.57
73.28
7.78
3.95
2.39
738.6
9.13
1.25
4.93
30.62
20.17

crystalRiver.rep
475.10 491.64
119.96 17.25
119.96 17.25
1516.63 67.09
23.00 7.22
11.64 3.89
5.22 2.39
15287.9 676.3
23.07 8.66
3.20 1.21
40.40 4.76
63.87 29.68
19.29 20.20

warning: The energy equation could not be balanced within the spe cified nUlllber of iterations. The
progr!1ll used criticlI,l depth for the water surface II,nd continued on with the calculations.
warning: The velocity head has changed by lIlore than 0.5 ft (0.15 m). This may indicate the need for
II,dditional cross sections.
warning: The energ::( loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This mllY lndicate the need for additional cross sections.
warning: During the standard step iterations, when the assumed water surface was set equal to critical
depth, the calcu1ated water surface came back below critical depth. This ind1cates that the...e is
not a valid subcritical answer. The program defaulted to critical depth.

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CROSS SECTION OUTPUT
~er'H~~~v(~~p
W.~. Elev (ft)
Crltw.S. (ft)
LG. slope (ft/ft)
QTotlll (cfs)
~~V ~~~~ m~S)
Maxchl opth (ft)
".nv.Totallcfs)
lengthwtd. ft)
MlnchEl(ft)
Alpha
FrctnLoss(ft)
C & E loss (tt)

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Warning:
Warning:
warning:
warning:

The energy equlltion could not be balanced within the specifiednU1l1b erof itera.tions. 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 (G.15m). This may indicate the need for
additional cross sections.
The energ~ loss WaS greater than 1.0 ft (0.3 m). between th.. current and previous cross section.
This"II,Ylndica.te the need for additlonal cross sections.
During the standard step iterations, when the assumed water sur face WaS set equal to critical
depth, the calculated water surface came back below critical depth. This lndlcates that there is
not a valid subcritical'answer. The program defaulted to critical depth.

Profile#50-year
7928.85 Element
2.54 Wt. n-val.
7926.30 Reach Len. (ft)
7926.30 Flow Area (sqft)
02g~~~~ ~~: ~~~s~t)
4G.29 TOPW1dthfft)
1~:~~ ~~~;..v~~Pthf~m
21073.0 Conv. (cfs)
476.14 wetted per. (ftl
7919.92 Shear (lb/sq ft
1.35 stream power (1 Ifts)
4.71 Cum volume (acre-ft)
0.38 Cum SA (acres)

LettoB
0.060
466.19
24.67
24.67
103.93
8.96
4.21
2.75
1078.3
10.52
1.36
5.73
37.48
n.25

chanrlel
0.035
475.10
136.71
136.71
1831.92
23.00
13.40
5.94
190G7.4
21.07
3.44
46.05
71.50
19.29

Ri8~~6gB
491.64
22.91
22.91
95.15
8.32
4.15
2.75
987.3
9.98
1.33
5.53
38.30
23.62

CROSS SECTION OUTPUT profi1el500-year
~~~'I\~~~V em) 7930.00 Element LeftOB Channel Rlg~66g8
1.87 wt.n-....al. O.Of>l) 0.035
~r~t ~~~':' m~ 7927.13 Reach Len. (ft) 466.19 475.10 491.64
7927.13 Flow Area {sq ft) 32.59 155.62 30.27
LG.slope(ft/ft) 0.008951 ~~~ ~~~~~t) 32.59 155.62 30.27
QTotal (ch) 2515.00 147.89 2231.71 135.40
~~~ ~~~~ HUs) 42.87 r~~. W~~f~ m}s~ 10.30 2LOO 9.57
11.51 4.54 14.34 4.47
~~~v~hio~~fh(2m 7.ll ~ydr. Depth (ft 3.16 6.77 3.16
26583.3 Conv.(cfs) 1563.1 23588.9 1431.2
L.",gthwt:d. (ft) 476.17 wetted Per. (ft:~ 12.09 23.07 11.47
MinchEl (ft) 7919.92 Shear (lb/sq ft 1.51 3.77 1.47
Alpha 1.39 Stream power (11ft s) 6.84 54.06 6.60
FrctnLOSS(ftl 4.36 Cum Volume (acre-ft) 47.81 80.83 50.44
C & E LOSS (ft 0.50 (UmSA(acres) 27.07 19.29 27.77

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warning:
warning:
warning:
warrling:

Theenergyequationcouldnotbebal.ancedwithinthespecifiednumberoflterat:ions. The
program used critical depth for the water surface and continued On with the calculations.
The velocity head has ,changed by more tharlO.5 ft (O.1Sm). This may indicate the need for
additionalcrosssect10ns.
The energ~ loss was greater than 1.G ft CO.3 m). between the current and previous cross section.
ThismaYlndicate the rleed for additional cross sections.
ourirl9 the searldard step iterations, when the assumed water surface was set equal 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 SECTIO~

RIVER: crystal
REACH: "'arble

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RS: 18067

INPUT
~~:~i~~t~~~~ation Data numm
sea Elev sea Elev
07950.32 8.877946.63
24.57939.41 29.89793664
71.027931.59 79.717930.41
106.517927.39107.297927.31
117.567924.18119.957923.85
149.1S7920.92 168.887919.57
191.027918.79192.477918.73
205.717n4.25 236.37914.25
249.437916.62252.847n8.16
278.987932.52282.927934.83
298.767915.27303.447935.09
338.027934.16 339.75 7934.11
369.297936.38370.587936.59
385.657941.42387.687941.43
428.547941.22 438.S47941.1S
499.757941.09508.547941.07
527.797945.25530.687945.94
540.167946.59546.317947.74

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Manning's n values
Sta nval Sta
o .06192.47

Bank sea: Left
205.71

numm
n val
.05

89
Sta Elev
9.857946.25
44.987935.37
95.487928.81
108.41792696
131.79792311
174.52791931
194.53 7918 01
239.257914,74
254.517919.25
284.57935.76
305.417935.01
351.747934.23
378.717938.87
389.757941.4
448.547941.03
521.397940.88
531.437946.34
549.897948.09
5
m
205.71

'"
236.3

Sta Elev
10.267946.05
46.557935.17
96.227928.72
112.457925.66
133.117922.94
181.117918.99
201.247915.65
242.287915.26
266.747925.8
287.027935.68
315.687934.SS
359.127934.19
379.577939.08
398.547941.B
479.757941.03
521.477940.94
534.17946.47
561 ~52 7948.78

n val
.035

~a~j

Lengths: Left channel Right
658.53 592.77 538.05

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CROSS SECTIO~ OUTPUT profile nOO-year
~~r' H~~~v (~W
~;'~t ~~~':' ?m
E.G. slope (ft/ft)
QToul (ds)
~~~ ~~;~ ~~nS)

79lG.70 Element LeftOB Channel R18~65gB
1.79 Wt.n-val. 0.050 O.OlS
7918.91 Reach Len. (ft) 658.S3 592.77 538.05
7918.91 Flow Area (sq ft) B.52 142.54 51.59
0.009905 ~~~: ?~~s~t) 33.52 142.54 51.59
2181.00 172.22 1680.21 328.57
69.96 TOp width ~ft) 21.80 30.5'! 17.57
9.58 Avg. Vel. ft/s) 5.14 11.79 6.37
page 24

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n val Sta
.05249.43
coeHContr.
.1

Sta Elev
22.087940.71
50.287934.64
97.077928.63
115.877924.58
144.417921.31
183.887918.91
204.447914.6
246.557915.97
270.687'!27.97
291.217935.54
322.777934.33
360.557934.49
382.917940.29
408.547941.22
488.547941.09
524.197944.24
537.767946.56

nval
.06

Expan.
.3