A fish ladder for incorporation between ends of a water structure that includes
at least a pair of separate sleeves that are each formed from a puncture resistant
flexible material, contain a volume of water and may have a closed end or ends
for resting on edge portions of a flat base plate of the fish ladder. The flat
base plate includes a pair of parallel spaced apart upstanding side walls that
are individually extend across the flat base plate. The upstanding side walls each
include pairs of spaced apart channels extending from the side walls, with the
pairs align to receive flat rectangular dam sections fitted therein, forming interior
dams that a flow of water, as travels through the fish ladder, fills between as
pools that fish, traveling up stream, jump between, to travel up the fish ladder
and exit into a body of water that is contained by the water structure.