about the economic development plans, was diverting half of rippledown rill to trident and deepening it enough to form a canal from trident to god’s eye included? if not, that might be a nice feat to be able to navigate all the way from neck to KL inlands.

I don’t think the geography of that quite works out.

From my reading of the text, the Rippledown Rill would have to be to the west of Harrenhal (on a rough northwest to southeast loop), which would substantially extend the length of a Trident-Godseye canal compared to just building north from Harrenhal (where the Godseye is about 50 miles closer to to the Trident compared to the eastern or western sides) to the nearest point on the Trident.