Question

A fuse plug is a collapsible version of these structures that can increase their capacity. A grout curtain protects the foundations of these structures, where the auxiliary spillway may release flow in excess of the capacity of the service spillway. They’re not bridges, but the sides of these structures contain abutments for support. Newer versions of these structures may contain (15[1])a (*) fish ladder to allow migration paths. (10[2])Unlike floodgates or levees, these structures are primarily used to retain water. For 10 points, name these often massive barriers that can produce hydroelectric energy from the water they prevent from flowing. ■END■

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