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Lowering Drape lines & Creating Surface

Question asked by Richard Schaeffer on Feb 7, 2020
Latest reply on Feb 7, 2020 by Richard Schaeffer

Is there a way to drape lines over a finish grade surface then lower those lines to create a subgrade surface. I was attemping to use Back of Curb as the drape line and also lowing the contours in the road surface to create a subgrade surface? I can lower the drape line and all seems to work until I try to complete the surface and the drape line are not part of the surface. Try to add them as surface member but does not work either