When salmon return from the ocean to the Klamath River after the world’s largest dam removal project ends this fall, they will regain access to 400 miles of historical spawning habitat their species has been cut off from for more than a century. When salmon return from the ocean to the Klamath River after the world’s largest dam removal project ends this fall, they will regain access to 400 miles of historical spawning habitat their species has been cut off from for more than a century. Plants & Animals Ecology Phys.org – latest science and technology news stories