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

. CROSS SECTION OUT rUT Profile HIDD-Year
E.G. Elev (ftl 74.01 Element Left OB Channel Rl.ght OB
Vol Head (ft) o ~ B 3 wt- n-Val. 0.03!>
H.S. Elev (ftl 73.18 Reach Len. (ft) le6.57 166.67 166.67
Crlt W.S. (ft) Flow Area (,q ft! 683.03
E.G. Slope (tt/ft) 0.003011 "<eo lsq ft) 683.03
Q Total (ets) 5000.00 Flow (cis) SOOD.DC
Top Width (ft) 120.44 Top Width (it) 120.44
Vel Total (ft/s) 7.32 Avg. Vel. (itls) 1.32
Max ChI "''" (ftl 6.94 Hydr. Depth (it) 5.67
Conv. Total (cts) 91124.8 Conv. [cis) 91124.8
Length Ht;:!. (ftl 166.67 Wetted Per. (ft) 122.61
Min eh El (ft) 66.24 Shear Ilb/sq fe, 1.05
Alpha 1.00 Stream Power (lb/ft " 7.66
Fretn Loss (it) 0.50 Cum Volwue (ac::e-ft) 227.98
C , E Loss (ft) 0.00 Curro SA (acres) 43.89
CROSS SECTION RIVER; Pawnee Overflow
REACH: Flood Control Ch RS; 11333.3-
INPUT
Descrl.ptlon;
Station Elevation Data num~ ,
St, Elev St. Elev Sto Elev Sto Elev St, Ele"\!
C 73.21 21.6 66.01 21.99 65.94 61.81 65.74 101.64 65.94
102.03 66.01 123.63 73.21
Manning's n Values num~ 2
St, " V,l 5<, n Val
C .035 C .035
Bank Sta: Loft Right Lengths; Left Channel Right Coeff Contr. Expan.
D 123.63 166.67 166.67 166.67 " "
CROSS SECTION OUTPUT Profile 11500 Yeal-
E.G. Elev (ftl 73.50 Element Ikft OB Channel Rlght "
V,l Head (ftl 0.83 WC- n-Val. 0.035
W.S. Elev (ft) 72.67 Reach r.en. (ft) 166.67 166.67 166.67
Crit W.S. (ft) Flow Area ('q ft! 682.07
E.G. Slope (ft/ft) 0.003023 Area "q ft! 682.07
. o Total jefs! 5000.00 Flow (efs) 5000.00
Top Width (ft) 120.38 Top Width (:tt) 120.38
Vol Total (ft/sl 7.33 Avg. Vel. (ft/s) 7.33
H.. Ch1 Dpth (ft! 6.93 Hydr. Depth (ft) 5.67
Conv. Total (ds! 90940.6 ConY. lcts) 90940.6
Length Wtd. (ft! 166.67 Wetted Per. (it) 122.55
Min Ch E1 lft) 65.74 Shear (lb/sq ftl 1.05
Alpha 1.00 Stream Power (lb/it " 7.70
f'rctn Loss (it) 0.51 Cum Volume (acre-it) 225.37
C , E Loss (ft) 0.00 C= SA lacres) 43.43
CROSS SECTION OUTPUT Profile 1Il00-Year
E.G. Elev 1ft) 73.50 Element L@ft 0' Channe':' Right DE
V,l Head (it) 0.83 Wt- n-VaL 0.035
W.S. Elev (ft) 72.67 Reach Len. (ft) Hi6.67 166.67 166.67
Crit W.S. (tt) Flow A1:ea I,q HI 682.07
E.G. Slope (it/ft) 0.003023 '"ee, "q '" 682.07
Q Total (efs) 5000.00 Flow (cis! 5000.00
Top Width (ft) 120.38 Top Width (ft) 120.38
Vol Total (ft/s) 7.33 Avg. V"!l. (ft/s) 7.33
Max ChI Dpth (it) 6.93 Hydr. Depth (ft) 5.67
ConY. Total (cis) 9094.0.6 Cony. (cfs) 9094.0.f
Length Wtd. (fti 166.67 Wetted Per. (f:) 122. -,
Mir. Ch E1 (ft) 65.74 Shear (lb/sg HI 1 05
l'-.lpl:a 1.00 Stream Power llb/ft " 7 ,70
Fret!". Loss lfti 0.51 Cum Volume lacre-tt) 225. r
C , C Loss If:) 0.00 Cum SA (acres I 4.3. 43
CRCSS SECTIOX l<.IVER: Pawnee Overflow
:::'EACH: Flooo. Con:rol Ch RS: 11166.6*
INPUT
Descriptio!".:
Station Elevat~on Data num~ ,
Sta Elev Eta Elev 5<" Elev Sta E1ev Sta Elev
, 72.69 21.57 65.5 21.96 6'5.44 61.75 65.24 101.53 65.44
101.92 65.5 123.49 72.69
~~a'-!"-:cng' s " Values r.l:.."'n~
Sta c, Val S:a Val
, . 03~ .035
5ar,,: Sta: Left ,,;gh: ::'er.gt.'1s: Left Channel Rig:1t Coeff Contr. Expan.
. 123.49 166.67 .""', 67 lff.fi ,3 --
:::KJSS S:::CT=CK O-:JTfTJ'::' ?roflle #~OO-Year
" ,,1e-,c itt., " .99 E':'er:ten: Left 0' C:la:l:lel ~_:gh,- C5