Flap gate losses

[MitchHeineman]

SWMM inherently applies the Armco equation for losses across flap gates associated with weirs and orifices. However, unless I'm not looking closely enough, it does not assign comparable losses to flap gates on pipes or outfalls. This seems inconsistent to me. While the user can apply a form loss coefficient to the pipe above an outfall or to a pipe with an internal flap gate, that's a slightly different equation.