From logging is hard to quantify as you would need data over years to verify the flow increase in high water events. A good example is 2010 flood on the Satsop and it left a four inch line of eggs right through the Schafer Park parking lot as the water receded. Redd scour is product of high water events that timber harvest effects are about impossible to quantify. Now siltation from roads and most certainly contributing to low summer flows are real. When replanted trees root systems and branch shading do not do much until 15 years old and fully functional 20 years old. With 40 year rotations that is half the life cycle in a tree farm. The larger RMZ setbacks have helped rearing areas and reduced erosion but do nothing for low summer flows.