Why Low-Head Dams Are Deadly for Small Boats

Low-head dams create a suite of lethal hazards for paddlers and small craft:

1. Hydraulic Recirculation: A powerful "keeper hole" or "boil" traps and recirculates boats and bodies.
2. Vertical Drop: Sudden water-level fall creates a hydraulic jump that can capsize or swamp craft.
3. Undertow: Strong downward current pulls victims underwater.
4. Poor Visibility: Turbulent, aerated water obscures the danger.
5. Debris Accumulation: Logs and branches add entanglement risk.
6. Deceptive Appearance: Calm upstream water masks the hazard downstream.
7. Underestimation: Boaters often misjudge the risk.
8. Limited Maneuverability: Small craft cannot power through the hydraulic.

Awareness, portage, and caution are essential near these "drowning machines."