Depressed Sewer Design?
Depressed Sewer Design?
(OP)
Does anyone have any experience in a single barrel depressed sewer design for a sanitary sewer application? Flow will be continuous from a force main upstream. Approx. flow: .3MGD. Elevation difference (inv. to inv.): approx. 30 feet.
Hoping someone could point me in the right direction! Thanks!
Hoping someone could point me in the right direction! Thanks!





RE: Depressed Sewer Design?
RE: Depressed Sewer Design?
Most depressed sewers have multiple pipes because you have to design for variable flow rates, But if the sewer flow is constant, there is no reason that you can not use a single pipe.
Is it possible to extend the force main to eliminate the depressed sewer?
Also, is the flow constant from a force main? Most sewer systems exhibit diurnal flow variations.
RE: Depressed Sewer Design?
To answer the question, extending the force main is possible, but town "B" wants to leave it gravity to possibly encourage development and tie ins in the future. A force main would not facilitate this and town "B" would not agree to this, unfortunately.
Since my first post, I have looked into the second edition of ASCE'S MOP 60 (WEF FD-5) as suggested. I have found some useful material going forward in this text.
RE: Depressed Sewer Design?
RE: Depressed Sewer Design?