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Hi Pels, Thanks for posting the link. It's really is very helpful. Chris

Actually, the original design was to use a culvert but our client wants to use the dip instead. Tnx for the advice.

hi msquared48, actually, Ductile Iron Pipe was the first thing that came in to my mind. But according to our client, it's not. I agree that it's a road depression. I just wanted to know what are the specifications for this type of design. A drawing detail would be the best answer. thanks...

hi, does anybody know what a dip in road is? when is it best to use and what should be the specs. i am designing an access way for the utility area of the project i'm working on and this particular access way will block all possible drainage going to the ditch around that area. our client...