Gentlemen:
What I have found (and been taught in school and various seminars) is a 25' minimum. 30 is even better.
FYI: The flat inlet channel also exists to reduce the velocity & therefore, the energy of the flow.
Thanks, men.
Hello All.
I'm getting some static from a new reviewer at our local Conservation District about this.
He wants ONLY a 4' long level section. This, btw, is less tha what's required (6' min.) for embankment width.
We refuse to go any shorter than 25' (site permitting) as the USSCS requires...