The concrete dams built on Estonian rivers during the Soviet Union have reduced the number of migratory fish in the rivers to a critical level at times. For the past three years, the State Forest Management Centre, together with Põlula Fish Rearing Centre has been working on the removal of dams and relocating fish to the salmon rivers. This film shows the effect of dams on the spawning of migratory fish and what the river will look like after the dam is removed