| 11. | Rainbow smelt are weak swimmers so they cannot make it over fish ladders.
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| 12. | At the first power plant, the Lower Tuloma, a fish ladder was built.
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| 13. | There is a fish ladder, but it has never been functional.
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| 14. | It also regulates the accessibility through dams on major waterways via fish ladders.
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| 15. | A 200 foot long fish ladder was constructed along the site.
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| 16. | The Elwha dams were built more than 70 years ago without fish ladders.
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| 17. | This follows the opening of a fish ladder at Sprotborough weir in 2014.
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| 18. | A fish ladder to support shad migration has been constructed at the Manayunk dam.
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| 19. | The river now has a man-made dam and fish ladder.
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| 20. | There is also an adult fish ladder at this location.
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