Stoop does make a valid point, Riverrun redo will be a while off so it could indeed be a situation where we have to nuke parts of the Pemford area, for river re-terra. I won't stop you from going forward with this project, but this is definitely a concern of mine. If you were to go ahead, I'd be tightly managing the project aswell.
You could move this up to the Lychester area, and finish that project? Lychester keep is complete, but there's a lot of land around there that hasn't even been touch, due to the unorganised projects on the server when Ollie made Lychester Keep.