Waterway n. : Heavy plank or timber extending fore and aft the whole length of a vessel's deck at the line of junction with the sides, forming a channel to the scuppers, which are cut through it. In iron vessels the waterway is variously constructed.

Example:
What is the human made Waterway that connects the Pacific Ocean and Atlantic Ocean?

Taxonomy
Waterway, Gas.

Defination from the web:
Waterway® Gas & Wash Company ...