Tidal __; Dam-Like Structure, Harvests Tidal Power
Puzzle 6 of Energy Sources Hard Pack
Question is: Tidal __; Dam-Like Structure, Harvests Tidal Power
and the answer is: BARRAGE
Word Meaning:
BARRAGE — An artificial obstruction, such as a dam, in a river designed to increase its depth or to divert its flow.
Definitions from Wiktionary.