AutoCAD Civil 3D :: Grading Automatic Surface Creation

Aug 7, 2013

I attached 3 pictures describing my problem.

On the first one you can see the feature lines i'm about to grade. The closed line is a pond and the two lines on the right is a riverbed. The area between them is just land.

On the second picture you can see a part of the surface i need to get by grading. I need the pond, riverbed and land to be one surface.

On the third picture you can see what happens, when i try to grade the riverbed under the same grading group. The pond surface disappears while the grading stays.

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