Lack of fish ladders at the Chief Joseph and Hells Canyon Dams ensure that the upper main stems of the Columbia and Snake Rivers are now completely blocked to fish passage, thereby cutting off the largest part of original spawning habitat.
(the upper main stems of the Columbia and Snake Rivers; blocked; to fish passage) (the upper main stems of the Columbia and Snake Rivers; to fish; passage) (the upper main stems of the Columbia and Snake Rivers; cutting off; the largest part of original spawning habitat) (Lack of fish ladders at the Chief Joseph and Hells Canyon Dams; ensure; that the upper main stems of the Columbia and Snake Rivers are now completely blocked to fish passage) Context(Lack of fish ladders at the Chief Joseph and Hells Canyon Dams ensure,List([0, 69))):(the upper main stems of the Columbia and Snake Rivers; are; T:now; completely blocked to fish passage)
Lack of fish ladders at the Chief Joseph and Hells Canyon Dams ensure,List([0, 69))
the upper main stems of the Columbia and Snake Rivers the upper main stems of the Columbia and Snake Rivers the upper main stems of the Columbia and Snake Rivers Lack of fish ladders at the Chief Joseph and Hells Canyon Dams the upper main stems of the Columbia and Snake Rivers
blocked to fish cutting off ensure are
to fish passage
passage
the largest part of original spawning habitat
that the upper main stems of the Columbia and Snake Rivers are now completely blocked to fish passage
T:now completely blocked to fish passage