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What the Bonneville Lock Actually Controls, System by System

I first read about the Bonneville lock as a building: a long concrete box with two gates. The more I looked, the more it seemed like a control system, and a strict one.

  • Bonneville Lock controls water level, chamber depth, upstream pool depth, and vessel position.
  • Upstream pool supplies pressure source for flow rate control using head difference.
  • Floating bollards adjust vessel position based on water level changes.

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