Minimum Pond Outfall Pipe Encasement
Minimum Pond Outfall Pipe Encasement
(OP)
Hello all,
I'm wondering if anyone has any information on what the minimum length a pond outfall pipe has to be concrete encased. I'm in Maryland and haven't found anything in the MD 378 Pond Spec, but I may be looking in the wrong place. Also, my boss seems to think it is a national standard. Any help would be appreciated.
-Jay
I'm wondering if anyone has any information on what the minimum length a pond outfall pipe has to be concrete encased. I'm in Maryland and haven't found anything in the MD 378 Pond Spec, but I may be looking in the wrong place. Also, my boss seems to think it is a national standard. Any help would be appreciated.
-Jay





RE: Minimum Pond Outfall Pipe Encasement
What I have heard of is an anti-seep collar in the midst of the berm around the culvert to prevent erosion along the pipe.
In my area we just backfill the culvert with clay and slap on a precast headwall.
RE: Minimum Pond Outfall Pipe Encasement
From Maryland's Stormwater manual, Appendix B1 (Pond Code 378) page Pond MD-378-16:
2. Bedding - Reinforced concrete pipe conduits
shall be laid in a concrete bedding /
cradle for their entire length. This bedding
/ cradle shall consist of high slump
concrete placed under the pipe and up the
sides of the pipe at least 50% of its outside
diameter with a minimum thickness
of 6 inches. Where a concrete cradle is
not needed for structural reasons, flowable
fill may be used as described in the
“Structure Backfill” section of this standard.
Gravel bedding is not permitted.
RE: Minimum Pond Outfall Pipe Encasement
Is the cradle there to keep the sections of pipe from "parting company"?
As far as I know, its not a national standard, but it is used in MD and DE.
RE: Minimum Pond Outfall Pipe Encasement
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Minimum Pond Outfall Pipe Encasement