artificial fish ladder river with water flowing over concrete steps designed help wild salmon migrate upstream through |
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| navigate by keyword : wildlife wild water upstream undefined system symbol swimming sustainable structure steps spawning salmon route river restoration ramp project passageway passage nature natural migration migrate life ladder improvement help habitat freshwater flowing flow fishway fish facility environmental environment engineering ecosystem ecology ecological designed design dam conservation concrete artificial aquatic |
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| Artificial fish ladder in a river with water flowing over concrete steps, designed to help wild salmon migrate upstream through the dam, symbol of ecological restoration |
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