When migratory fish populations keep dropping and dams get in the way of their spawning journeys, fish managers often resort to "trap and haul." It is what it sounds like: trap the fish below the dam, take them by truck or barge or helicopter to the water above the dam.
Now two-way trap-and-haul is recommended for sensitive salmon species in dam-happy California.
And a report from UC-Davis recommends caution in that process.
Robert Lusardi is the lead author of the report.
He visits with Greg Taylor, a fish biologist involved with a trap-and-haul program at Cougar Dam in Lane County.