DCHP-1 Online
fish ladder † 
a device constructed at a waterfall to facilitate the upstream migration of fish to their spawning grounds.
See also: fish pass
- 1870 James Wyeth King [of Shubenacadi, N.S.] [invented] improvements in machines by which fish are enabled to surmount and pass darns, cascades and other obstructions in water courses, called "The King Fish Ladder."
- 1947 [Subheading] Fish ladders at Fraser River bottleneck promise boost to salmon industry of British Columbia.
- 1870 James Wyeth King [of Shubenacadi, N.S.] [invented] improvements in machines by which fish are enabled to surmount and pass darns, cascades and other obstructions in water courses, called "The King Fish Ladder."