| 21. | They are weak swimmers and cannot overcome most fish ladders.
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| 22. | Future plans are to repair the original dam structure and incorporate a fish ladder.
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| 23. | This dam's fish ladders and fish screens did not meet current legal or practical standards.
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| 24. | A fish ladder is integrated into the locks for migration of anadromous fish, notably salmon.
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| 25. | Examples of halfway technologies include hatcheries and fish ladders.
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| 26. | Without the fish ladder it would have been an impassable obstacle for the migrating salmon.
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| 27. | Many are lost at dams with inadequate fish ladders.
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| 28. | The old fish ladder had only 10 " steps "; the new one has 21.
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| 29. | The dam at Kaunas does not provide fish ladders.
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| 30. | The weirs have been equipped with fish ladders.
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