A year-round supply of water, steep mountain ranges and changes in elevation from its headwaters to its outflow at the Pacific Ocean, make the Columbia River system ideal for generating hydroelectricity.
A series of dams and reservoirs, connected by the Columbia and Kootenay river systems in Canada, generate about half of the hydro power produced in BC. Generating hydro power and managing the rivers for flood control means water levels change. In some communities, water levels can change over the course of a day, while in others, water levels change gradually over the year. If you live in the Trust region, water levels will likely go up and down: it’s just a question of when and by how much.