Throughout the book Boll and his colleagues continuously stress the significance of the many important contributions that psychology has made to medical science's knowledge and understanding of the causes and consequences of physical and emotional illness.
There are more than 60 dams in the Columbia River watershed in the United States and Canada. Tributaries of the Columbia River and their dammed tributaries, as well as the main stem itself, each have their own list below. The dams are listed in the order as they are found from source to terminus.
Throughout history the Sandy River has had two mouths, the upper one entering the Columbia River at River Mile (RM) _____, and the lower one entering at RM 120.5. In 1931 a dike/dam was built to block the main upper (easternmost) channel, allowing all flow to enter the Columbia at the lower mouth.