Publisher's Synopsis
Excerpt from Trial of Denil-Type Fish Ladder on Pacific Salmon
Interest in the Denil - type fish ladder constructed at the Herting power dam in Sweden led to the construction at Dryden Dam of one patterned after the Swedish installation. Comparison of the Denil-type and pool type ladders was facilitated because it was possible to construct a Denil type ladder in one-half of the existing pool-type ladder at Dryden Dam.
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