AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

Posts: 24
Registered: ‎06-18-2008
Message 1 of 4 (312 Views)

FG for Dredging

312 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: 24
Registered: ‎06-18-2008
Message 2 of 4 (310 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 (95 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: 5,189
Registered: ‎12-15-2008
Message 4 of 4 (88 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

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