Stormwater Outfall - Definition??
Stormwater Outfall - Definition??
(OP)
I've come across a discrepancy in the definition of a Stormwater Outfall. GA Env. Protection Div. says its the outlet of any stormwater conveyance system. But people have told me ASCE defines it as the stormwater conveyance system itself - not just the outlet, like an outfall sewer. What is the correct definition?





RE: Stormwater Outfall - Definition??
If one is dealing with NPDES in Georgia, their website (http://www.gaswcc.org/level-1a/1a-4-npdes.pdf) page 42 states:
"Outfall – the location where storm water leaves the site or enters the receiving stream"
RE: Stormwater Outfall - Definition??
The discrepancy is not a contradiction, but a difference in scope. If the study/concern is erosion and velocity at the outlet, as with an E&S plan, the "outfall" is the Endwall and Energy Dissipation. If the study/concern is capcity and failure to get water out of an area, as with municipal engineering review, the "outfall" is all facilities downstream of an area.
Engineering is the practice of the art of science - Steve
RE: Stormwater Outfall - Definition??
RE: Stormwater Outfall - Definition??
The ones that I've mapped, I've also done the end of every pipe dumping into a waterway. It looks like job security for the PE in MO!
Engineering is the practice of the art of science - Steve
RE: Stormwater Outfall - Definition??
Of specific concern in most cases is to ensure that the design meets the requirements for Adequate Outfall, which means that the receiving channel or sewer network has adequate capacity to convey the discharge from your project site. For example, a SWM basin discharging to a stream, or a private storm sewer discharging to a public storm sewer.