HomeMy WebLinkAboutApplication Files_82693_pg0890 #1B Vanasse Hangen Brustlin,Inc.
Transportation, Land Development,and Project# 72189-CT Studios
' Environmental Services Location South Windsor, CT
54 Tuttle Place Design Storm(Years) 25
Middletown,CT Date 3/9/2010
' Revised
Designpd By GAA
Checked By
Checked By
F'D: MINIMUM MEDIAN STONE DIAMETER(1350)AT EACH FLARED END STRUCTURE(FES)
MINIMUM DIMENSIONS OF FES APRON
4EN: 1. EQ. FOR LENGTH OF FES APRON:
(source:RI Stormwater Design Manual)
' 1.7 Q Q= pipe discharge (CFS)
La = 3/2 + 8Do ; where
Do Do= maximum inside
culvert width (ft)
2. EQ. FOR WIDTH OF FES APRON*:
(source:RI Stormwater Design Manual)
W= 3 Do+ La where La= minimum width of FES
apron (ft)
*Note: Assumes tailwater depth Do= as described above
is less than 1/2 of Do
3. EQ. FOR MEDIAN STONE DIAMETER:
' (source:RI Stormwater Design Manual)
0.02 { Q 4/3 TW= tailwater depth above
d50 TW \ DO where invert of the culvert
(ft)
Q DO= as described above
4. Tailwater Depth =0.2-0.4 feet.
(Assumed value used to reduce the effects of tailwater on velocity
dissipation to neglible levels)
5. Values of Q at each FES.
(Source:HydroCAD hydrologic model by VHB)