Flume n. A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artifical channel of water for hydraulic or placer mining; also, a chute for conveying logs or lumber down a declivity.
... of V-shaped trough, about three feet deep, and are built on trestles after the manner of the elevated roads. The height of the flume from the ground ranges from twenty to one hundred and twenty feet, and they are fifty to ... — The Great Round World And What Is Going On In It, April 1, 1897 Vol. 1. No. 21 - A Weekly Magazine for Boys and Girls • Various