PERMFILE119292

• Permit No: C1981020A
• IBM Index Class Name: Permit File
• Doc Date: 8/2/2006
• Section_Exhibit Name: Tables 2.1-1 to 4.1-5
• Media Type: D
• Archive: Yes

Table 3.9-3 PEAK DISCHARGE FOR RECLAIMED EPHEMERAL CHANNELS

•

AYERAGE SLOPE CALCULATION WHERE SLOPE = 0 25 Z (LC25+LC50+LC75)
ARFA/cn.R\

Basin :Elevation
Bottam Top-~
Elevation Ei Dit
Z ~'-LC25
~~iengtB --yC50
-length ~~- LC75
--length -:AREA --~~
K S -FT ACRES -.. AVG~ ~~
SLOPE
A 5475 6345 870 1240 1532 1492 1,965 45.11 47.2 n
B 5575 6100 525 258 367 160 174 3.99 59.3
C 5550 6150 600 319 243 190 192 4.41 58.8 0
D 5525 6345 820 420 380 608 675 15.50 42.7 0
E 5650 6480 830 800 904 1056 1,442 33.09 39.7 n
F 5650 5950 300 286 306 278 82 1.87 80.0 0
G 5700 6040 340 240 384 272 226 5.18 33.8
H 5700 6720 1020 1392 1000 992 2 502 57.45 34.5
PEAK FLOW CALCULATIONS
for 1 O year 94hour even} 7 7 inchec
.'.
Basin -Hydraulic
::LengM - -Area:
_(acres)~ Basin'
Scope ~.- -'slope-
ADJ # ~ ; equiv '-
: ~ :Area '°CFSlIN
~ ~ ~~ -Ro-'
~ -:Equiv. ~
:Dischar ~ ~ ~Acfual
Discharge
A 2240 45.11 47 0 1.22 52.14 48 0.09 5.27 4.56
B 1050 3.99 59 1.25 14.74 19 0.09 2.14 0.58
C 1160 4.41 59 1.25 17.41 22 0.09 2.48 0.63
D 2020 15.50 43 1.15 43.89 43 0.09 4.45 1.57
E 2200 33.09 40 1.18 50.60 47 0.09 4.99 3.26
F 810 1.87 80 1.19 9.57 14 0.09 1.50 0.29
G 1012 5.18 34 1.09 13.87 19 0.09 1.86 0.70
H 3040 57.45 34 1.18 86.75 69 D.09 7.33 4.85
* -- Cover = 43.3 % Veg. + 24 q, litter = 67.3go Figure S-3 Juniper/Grass & Soil C CN = 67
DITCH DESIGN Trapezoidal Ditch
Vmax for both soil types will be 5.0 fps. All ditches have been designed for lower flows.
All ditches will be lined with "LANDLOCK 450" or equivalent to help armor the channel and protect
it from eroding. Manufacturers design limits call for Shear Stress to be less than 2.0
The LANDLDCK 450 will be anchored in accordance with the manufacturers recommendations.
Mav Slnno Araa

M
::::.
Basin- Elev,
Diffr 01#ch
engt Oitoh
.'Slope ', Manning:
Numile= . Slde
Slopes
/ :: .!Base
-Width
, :...Ditch .
Depth
,. .~.E)epth
=of-Flow Area-. of
Fldw: Hydr,.
Radius Flow-
Velocity
F Designi
Flow . ..SHEAR
T=wys
/
A 6 60 0.1 0.035 1.00 4 1.5 0.228 0.964 0.2075 4.72 4.55 1.42
B 20 90 0.22 0.035 1.00 1 1.5 0.120 0.134 0.1003 4.33 0.58 1.66
C 15 40 0.38 0.035 1.00 2 1.5 0.071 0.147 O.ObbB 4.29 0.63 1.b6
D 35 130 0.27 0.035 1.00 2 1.5 0.107 0.332 0.1007 4.78 1.59 1.80
E 13 135 0.10 0.035 1.00 4 1.5 0.189 0.792 0.1746 4.13 3.27 1.14
F 8 35 0.23 0.035 1.00 0.5 1.5 0.117 0.072 0.0870 3.99 0.29 1.67
E & F 10 70 0.14 0.035 1.00 5 1.5 0.155 0.799 0.1469 4.48 3.58 1.38
G 20 40 0.50 0.035 1.00 3 1.5 0.055 0.168 0.0532 4.26 0.72 1.72
H 20 100 0.20 0.035 0.50 7 1.5 0.138 0.975 0.1335 4.97 4.85 1.72
inn volt tatz-sa