PERMFILE41445

• Permit No: C1981038
• IBM Index Class Name: Permit File
• Doc Date: 6/29/2004
• Section_Exhibit Name: Volume 8 Surface Drainage - Culvert Capacities
• Media Type: D
• Archive: No

J bLI:NU+ I:ULVCi K'1' b1LliVb U'1'1Ll'1'Y
ORCHARD VALLEY CULVERT "R" 10 YEAR
Design Discharge = 6.320
Entrance Loss Coefficient 0.9
Pipe Length 60.000
• Pipe Slope a 9.000
Manning's n 0.024
Maximum Headwater 2.500
Tailwater Depth = 0.000
Smallest Diameter Required to Pass Flow is
PERFORMANCE CURVES:
Diameter, 12 inches
cfs
feet
feet
feet
15 inches
Headwater Discharge Flow
(ft)
------------- (cfs)
------------ Control
------------------------ Type
---------
0.25 0.41 Outlet (Subcritical) 1
0.50 0.82 Outlet (Subcritical) 2
0.75 1.39 Inlet (Supercritical) 3
1.00 2.09 Inlet (Supercritical) 3
1.25 2.83 Inlet 5
1.50 3.42 Inlet 5
1.75 3.96 Inlet 5
2.00 4.39 Inlet 5
2.25 4.82 Inlet 5
2.50 5.20 Inlet 5
• --------===== a=
s==
=
=____________________
Diameter 15
inches
Headwater Discharge Flow
(ft)
------------- (cfs)
------------ Control
------------------------ Type
---------
0.25 0.47 Outlet (Subcritical) 1
0.50 0.95. Inlet (Supercritical) 3
0.75 1.72 Inlet (Supercritical) 3
1.00 2.63 Inlet (Supercritical) 3
1.25 3.67 inlet (Supercritical) 3
1.50 4.71 Inlet (Supercritical) 4
1.75 5.61 Inlet 5
2.00 6.39 Inlet 5
2.25 7.09 Inlet 5
2.50 7.71 Inlet 5

Diameter: 18 inches
Headwater Discharge Flow
(ft)
------------- (cfs)
------------ Contr
-------- ol
---------------- Type
---------
0.25 0.54 Outlet (Subcritical) 2
0.50 1.12 Inlet (Supercritical) 3
• 0.75
1.00 2.04
3.15 Inlet
Inlet (Supercritical)
(Supercritical) 3
3
1.25 4.40 Inlet (Supercritical) 3
. 1.50 5.78 Inlet (Supercritical) 3
1.75 7.22 Inlet (Supercritical) 3
2.00 8.42 Znlet 5
2.25 9.50 Inlet 5
7 C !A 1 !.t A 7 T r. l e r ~..
c-37