Sluiceway n. An artificial channel into which water is let by a sluice; specifically, a trough constructed over the bed of a stream, so that logs, lumber, or rubbish can be floated down to some convenient place of delivery.
... centre at three o'clock on Friday afternoon, and at four o'clock it was dry. That great body of water passed out in one hour. Park & Van Buren, who are building a new draining system at the lake, tried to avert the disaster by digging a sluiceway on one side to ease the pressure on the dam. They had about forty men at work and did all they could, but without avail. The water passed over the dam about a foot above its top, beginning at about half-past two. Whatever happened in the way of a cloud burst took place during the night. There ... — The Johnstown Horror • James Herbert Walker
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