The last obstacle for the free-flowing Klamath River was removed last week, allowing the waterway to reclaim its ancient course.

The algae destroyed critical habitat and left ... migratory fish now have an unimpeded aquatic highway to Upper Klamath Lake, ...

Their construction ultimately resulted in a river basin high in phosphorus and toxic algae, which flowed downriver killing off fish such as salmon and steelhead, while creating river water that was ...