An earthen construction which is built to carry water off the land without losing soil or cutting ditches. All water has to go somewhere and if it comes faster than the soils can absorb, it will run-off. Waterways catch the water run-off and direct it to the bottom of the slopes where it goes into ponds, creeks or eventually makes its way to a river. The waterways are usually grassed to catch any silt that accompanies rainwater or snow melt. Waterways are an important component of a terracing system and soil conservation plans.
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.