TIN lines cutting off swale?
Super new to civil. I drew a rain garden that is fed by a long swale and when I try to transform it into a tin there is always a line cutting across the swale. I have added vertices and that might change where it starts from and I have tried editing the tin lines but it all just seems to make more of a mess. Do I need to add a grade/slope line down the center of the swale? That just occurred to me so I haven't tried it yet but looking for suggestions.