Strategy: Barging And Other Transportation Devices
Issue: Fish Migration and Fish Populations
Rather than using a bypass system to channel fish back into the river downstream of a project, transportation uses the bypass system to move fish into barges. These barges then release the juvenile salmon back into the water several miles downstream. By doing this, the salmon do not need to risk different types of mortality as they travel downstream and pass through several projects during their migration to the ocean.
This process has been used extensively to assist salmon migration that begins in the Snake River. Issues with this method include the unnatural conditions introduced to the migratory path, disease that can occur while barging and the stress caused to juveniles by this process.
In some cases where migration paths are blocked going upstream, fish collection facilities and trucks are used to pass returning adults from one area of the river to another. Such a process is also referred to as “trap and haul.”