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Dams Limit Or Block Access To Salmon Habitats In Maine

More than 90 percent of rivers and streams in Maine are affected by dams, which directly kill or injure a significant number of Atlantic salmon on upstream and downstream migrations.
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Dams also harm important habitats by free-flowing flooding rivers, reducing water quality, and changing fish communities. Finally, dams worsen the effects of climate change by limiting the access of Atlantic Salmon to cool-water habitats in the higher elevation areas of Maine. Of the more than 400 dams along rivers and streams that support wild Atlantic salmon, only 75 have fishways, a structure that allows fish to swim around dams to reach their spawning grounds.

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