For 10 points, name this river that provides much of the border between Oregon and Washington State.
This river passes near the city of Kettle Falls, although the rapids that give the city its name no longer exist. Tributaries of this river include the Okanogan River, and this river passes through the artificial Franklin D. Roosevelt Lake. In 1979, the Chief Joseph Dam opened on this river. The 1915 opening of the Celilo Canal provided access to (+) Lewiston from this river, although the Celilo Falls were eventually flooded by the construction of The Dalles Dam on this river. An important source of power in the region comes from the Grand (*) Coulee Dam on this river. It is the largest North American river to flow into the Pacific Ocean. For 10 points, name this river that provides much of the border between Oregon and Washington State.
This river passes near the city of Kettle Falls, although the rapids that give the city its name no longer exist.
{Columbia} River