AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

Posts: 22
Registered: ‎06-18-2008
Message 1 of 4 (301 Views)

FG for Dredging

301 Views, 3 Replies
11-01-2010 11:10 AM


I am trying to create a FG surface for a dredging project. I've made a corridor representing the maximum elevation that the channel can be; in some areas it is cutting and in some areas it is filling but I really only want the cut to show up on my FG.


Is there a way to build an assembly that will result in a corridor that only cuts or, alternatively, is there a way to define a new surface that looks at two source surfaces and takes the lower elevation?


Note that at a given station, there may be both cut and fill at different offsets so I don't think using, say, a ditch subassembly would work since it checks for cut/fill at only one offset (at least as I understand it.)


Thanks for the help,


Posts: 22
Registered: ‎06-18-2008
Message 2 of 4 (299 Views)

Re: FG for Dredging

11-01-2010 11:18 AM in reply to: kerksieck

another thing:


extracting polylines from a volume surface to create boundaries and pasting the results together is not really satisfactory as it is not dynamic.

Active Member
Posts: 6
Registered: ‎09-28-2010
Message 3 of 4 (84 Views)

Re: FG for Dredging

05-15-2014 03:15 PM in reply to: kerksieck



I know it's been a while since you posted this question but, I'm having the same problem and looking for an answer.  Did you ever find a solution?




*Expert Elite*
Posts: 4,954
Registered: ‎12-15-2008
Message 4 of 4 (77 Views)

Re: FG for Dredging

05-15-2014 03:34 PM in reply to: cmbarrett1

I don't have the full picture but it seems the me the profile grade line controls the cut. How does you corridor end in fill?

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
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