FLOOD06827

• County: Logan
• Community: Sterling
• Basin: South Platte
• Title: Pawnee Creek Overflow Interceptor Channel
• Date: 10/1/2001
• Prepared For: Sterling
• Prepared By: ICON Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

. t~an:Hng's n Values :1um~ 3
Sta n Val 0<0 n Val 0<0 n Val
0 .035 0 .035 124.Hi .035
Bank Sta: Left Right Lengths: Left Channel Right Coef! Contr. Expan.
0 124.16 166.67 166.67 166.67 ,3 ,5
CROSS SECTION OU1PUT Profile IIS00-Yea!:"
E.G. Elev 1ft) 75.52 Element Left 08 Channel Right OS
V.l Head ltt) 0.83 .t- n-Val. 0.035
w.S. Elev (tt) 74.69 Reach Len. (ttl 166.67 166.61 166.67
Grit iII.S. (it) Flow Ar-ea "q '" 684.34
E.G. Slope Ift/ft) 0,002993 Area "q ftl 684.34
Q Total lefs) 5000.00 Flow (cis) 5000.00
Top Width [ft) 120.48 Top Width Iftl 120.48
Vol Total lft/s) 7.31 Avg. Vel. Ift/sl 7.31
Max ChI Opth (ft) 6.95 Hydr. Depth Iftl 5.68
CClnv-. 'Iotal (cfs) 91366.8 Conv. (ctsl 91386.8
Length Wtd. (it) 166.67 Wetted Per. Iftl 122.67
Min Ch El (it) 67.74 Shear nb/sq '" 1. O~
Alpha 1 00 Stream Power (lb/ft " 7.62
F:r:ctn Lo" 1ft) 0, 50 Cum Voll.Ulle (acre-ftl 235.83
C , E Less 1ft) 0 , on Cum SA (acres) 45.28
CROSS SECTION OUTPUT Profile 1Il00-Year
E,G. Elev (ft) 75, 52 Element Left OB Channel Right OB
V" Head (ft) 0.83 Wt- n-Val. 0.035
1'1.5. Elev (ft) 74.69 ReaCh Len. (ft) 166.67 166.67 166.67
C:rit 1'1.5. (ft) Flow Area "q it) 684.34
E.G. Slope (ft/ft) 0.002993 Are. (sq ftl 684.34
Q Total (cfsl 5000.00 Flow (cfs) 5000.00
Top Width (ftl 120.48 Top Width (ft) 120.48
Vel Total (ft/s) 7.31 Avg. Vel. (it/s) 7.31
Max ChI Opth (ft) 6.95 Hydr. Depth (ft) 5.68
Con;l. Total Icfsl 91386.8 Conv. (cfs) 91386.8
Length Wtd. Iftl 166.67 Wetted Per. (ft) 122.67
Nio Ch EI (ftl 67.74 Shear Ilb/se;: ftl 1.04
Alpha 1.00 Stream Power {lb/ft " 7.62
Ftctn Loss {ftl 0.50 Cum Volume (acre-ft) 235.83
C , E Loss (itl 0.00 Cum SA (acres) 45.28
. CROSS SECTION RIVER: Pawnee Overflow
REACH: Flood Control Ch RS: 11833.3*
INP;;!
Description:
Station Elevation Data num~ ,
Sto Elev sto Elev Sto Elev Sh Elev St. Elev
0 74.78 21.67 67.56 22.06 67.44 62.01 67.24 101.97 67.44
102.36 67.56 124.03 74.78
Manr.ing's n Values num'"' 2
Sta n Val Sh n Val
0 .035 0 .035
Bank Sta: Left Right Lengths: Left Channel Right Coeff Centr-. Expan.
D 124.03 166.67 166.67 166.67 ,3 "
CROSS SECTION OUTPUT Profile Jl500-Year
E.G. E1ev (ft) 75 01 Element Left 0' Channel Right 0'
Vel Head (ft) 0, 83 ." n-Val. 0.035
W.S. Elev (ft) H, 18 Reach Len. (it) 166.67 166.67 166.67
C:nt W.S. (ft) Flow Area "q '" E83.E7
E.G. Slope (ft/ft) 0.002999 Area (sq it) E83.E7
Q'lotal (cfsl 5000.00 Flow (cfs) 5000.00
Top WJ.dth (~tl 120.46 Top Width (ft) 120.46
Ve: Total (:'t/s) .31 Avg. Vel. (it/s) 7.31
Max ChI Opth {it) 0, 94 Hyd::.-. Depth (ft) 5.66
Conv. Total lefs) 91297.9 Cony. (cfs) 91297.9
Length "'td. Iftl 166.67 Wetted Per. (ft) 122.64
Min Ch E1 (itl 67.24 Shear ilb/sq '" 1.04
Alpha 1.00 Stream Power (lb/ft " 7.63
frctn Loss (itl 0.50 Cum Volume (acre-ft) 233.21
C , , Loss (ftl 0.00 C= SA (acres) 44.81
CROSS SECTION OUTPU":' Profile nOO-Year
E.G. Elev ~ f t ; " E1 Element Leit 0' Channel Right "
Vel Head ift:, " 83 We. n-Va~ . 0.035
;\'.5. 21ev ift " .i6 Reach Len. (ft) 166.67 166.67 ~66. 67
c::-it \\.5. 1ft ;':'0,", Area isq HI 683. 8'
E.G. S lope ~:: 1ft: 0.002999 Area loq ftl 683. "'
:.2 Tet,,1 Icfs', 500J.00 F.'..o,", Icfsl ~:lOO . 00
T:.p \':idth 1ft 12:).4;'; ":'op Wldth ,:ftl l2:l. 46
. Vel Tet"l 1ft " .3: A-.-g. Ve~ . :f:!s) , .31
:!-lax Chi ::'pth :t) 6.94 Hydr_ ::epth 1ft) ,88
C,"cv. Total :s) 91297.9 Conv. Icfs) 91297.9
:'ec;;thWtd. t lEb. 67 Wetted Per. Iftl 122.64
!1ir.Ch:::l If E7 .2~ Shear Ilt/sq W 1.04