Note that these solutions rely on pre-existing attribution within the WBD (HUC12, ToHUC, HUTYPE fields in the WBDHU12 feature table) to determine connectivity among WBDHU12 polygons. For performance reasons these tools build an ancillary table. These tools must also include checking capability to flag inconsitencies in the coding (many of which have been recently fixed, thanks to these tools).

Potential points of conversation

(once initial code/method content documented a bit)