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.
The larger part of the river flowed under the railroad and highway bridges and about a half mile north. At that point, it veered east and entered the Columbia River almost two miles east of where it does today. In 1904, a large flood partially blocked the secondary channel and it began to run dry during the fish runs.