spawning

Mainstem spawning survey

Tail water fisheries experience regular, consistent water flow and temperature compared to natural streams, allowing fish longer growing seasons and healthy habitat for invertebrates that the fish eat. At the same time dams prevent fish from migrating to headwater streams to spawn.  These dams also trap gravels upstream that otherwise would move through a river during natural flooding and thus replenish in-stream spawning areas with new gravel that often gets silted over or scoured to other locations.

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