As the AquaDam® gains pressure, it is turned slightly until it is parallel with the stream flow. Note the log bunch on the right side. This will be great salmon habitat once the water gets deeper. 

The AquaDam® is now almost completely unrolled. Notice the man bending down in the middle; a rock-picker's work is never done!   

The flow on the left side of the AquaDam® has increased drastically, providing cool, deep water for the migrating fish.