SW6231202_Design Calculations_20240321

Definition of Input
End Section Name of end section where riprap is required
Qro 10-year peak flow rate
Pipe Diameter Diameter of pipe in feet
Class Enter class with D50 most near the calculated D50 in inches,per table 10.1
Riprap Calculations
Apron
Width at Apron
Pipe Apron Apron End of Width at
End Section Qro Diameter TW D50 D50 Class* D50* Length Depth Apron Structure Area
(cfs) (ft) (ft) (ft) (in) (in) (ft) (ft) (ft) (ft) (SY)
East Basin 4.69 0.75 0.3 0.76 9.11 4 14.00 4.50 2.57 5.2. _.2S .88
West Basin 5.38 0.75 0.3 0.91 10.93 4 14.00 4.50 2.57 5.25 2.25 1.88 _
O 4DIV/0! #DIV/0! 3 10.00 0.00 2.00 0.00 0.00 0.00
O #DIV/0! #DIV/0! 1 5.00 0.00 1.46 0.00 0.00 0.00
O #DIV/0! #DIV/0! 4 14.00 0.00 2.57 0.00 0.00 0.00
O #DIV/01 #DIV/0! 5 20.00 0.00 3.33 0.00 0.00 0.00
O 74DIV/0! 4DIV/0! 6 40.00 64.00 6.67 42.67 0.00 151.70
*Per Table 10.1 HEC 14-FHWA-Energy Dissipators Pg.10-18
Table 10.1. Example Riprap Classes and Apron Dimensions
Apron Apron
_Class D50(mm) D50(in) Length' Depth
1 125 5 4D 3.51355
2 150 6 4D 3.3De5
3 250 10 5D 2.4D50
4 350 14 6D 2.2D50
5 500 20 7D 2.0D50
6 550 22 8D 2.0D50_
1D is the culvert rise.
L I+ I AOTEr
I
. Emma, ft:,plocoosne or rrrm.m
3 neJ m Rural for m1•MM.
j�S`�±" -e4.•jvi`�..• 2.Fror. or... rol .0 N-E.
A ��.�Njs�41 A e o .Ij���'. 1S5II 8 re prboocrion
IX t `I�if._lit 1 1 i z r1IIt�. �I/ a.oxr.,arC.s nw**Oaf ore m*tars.
A-I apiii+ h, J l_• o ...j :_:ems.,
119
c :11:.901 l ili.. 'I-fl:�1 i ril ceonra ccrrN
_'.: tom.: � -. r.: r
3 3 VI ETERNKTERI
PLAN VIEN PLAN VIEW 2 I *XOo a9
0.3
6 X
J a Xo 4B
_ vwm 9raXv
•AbbA Verb.,sore 'Om° Sep.
$i ..'-1•21 T-1r i16074 LL:VZ., s r. nr
EMI..rEOfAY LAWS•+Owed 01•1500
GbaUM Co,'rX'Ik IETRIC DETAIL
SECTION A-A SECTION B-B PLACED RIPRAP
CULVERT WITH STANDARD CULVERT W!TNOl1T STANDARD AT CULVERTS
END SECTION END SECTION .N...•m....r.,... OEM.
a.. cM25h50
PROTECTIVE APRON AT CULVERT OUTLET
Figure 10.4. Placed Riprap at Culverts (Central Federal Lands Highway Division)