Salmon cannon could restore the population in the Upper Columbia

A so-called salmon cannon could restore salmon populations in parts of the upper Columbia river that have not seen the fish in 90 years.The salmon cannon is actually a fish-propelling system made by a Seattle company called Whooshh Innovations, which uses a series of tubes and computers to gently detour the salmon around dams,   “In truth, the fish aren’t shot anywhere. The fish actually swim in on their own, and they are then sorted into a tube that’s misted inside so it’s very slick and air pressure gently movies them up and over the dam,” >click to read<10:16

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