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• n  conduit that carries a rapid flow of water controlled by a sluicegate

• But just as the customers are about to scream, the monster waddles comically across the floor and revolves a massive iron wheel that looks as if it opened at least a sluiceway in .

• sluice
• penstock

News & Articles

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• Through a forgotten bridge engineer, a vision of Los Angeles
  Henry G. Parker's bridges were meant to inspire. A century after his death in a sewer sluiceway, the misty remnants of his creations are still eloquent. Like an L.A. noir, this mystery begins with a mystery. I'm standing under the midday, midsummer sun. To the west, the skyscrapers of downtown rise like the steep palisades of a nearby island. The sky is cataract blue.        
  Aug. 7, 2013 - Los Angeles Times