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Buffer polyline based on area (acres/hectares)

Question asked by ace974 on Feb 21, 2012
Latest reply on Mar 1, 2012 by ace974
I have a polyline (or polygon if necessary) that I would like to buffer in one direction based on a set area, rather than distance.  The idea is to model the potential spatial extent of an aggregate quarry based on current rates of expansion into the future.  I would like to figure out a way to do this with vector data but I do have a spatial analyst extension - which I have a feeling I might have to use in this case.  The quarry can only expand in one direction.  Any ideas on how I can tackle this problem?

Thanks for any assistance,