Low Head Dams: Not as prevalent in the Western U.S., but they are a concern in other parts of the country. I am not sure about around the world. These two videos are dated, but the visuals and info are relevent to the kayaker, boater, rafter on rivers with such dams/spillways. If you run rivers or know those who do watch the videos or share.  Low Head Dam Info  & Another Low Head Dam Tragedy