I'm a little vague on the permanent water flow thing. A culvert is the deciding factor? Since most ponds have culverts or pipes that discharge water, do they check to see where the discharge ends up? Water isn't static, and moves in and out of a pond whether it be privately-owned or not.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.