I just realized where this is! I have ancient archives of a great and vast trip that was taken by a Regent of old, who retraced the path our ancestors took when first charting these lands. This is an important geographical location, for the thin river/canal allows the Kabranthian ocean to reach the ocean around the Imperial Isle. I propose helping Arjen widen the canal to allow the pass of large ships, much like the canal between Greater Minerva and Valtoros. The good news is this strip of land is considerably smaller, so it should be a reasonable endeavour. We could even put up retaining walls and boardwalk style edges.
Actually, it might even be easier to build a straight canal through the city, which would look pretty neat with bridges and such. Consider me at your disposal
(Once I buy minecraft again).