|Map showing Ferry County and all of Franklin D. Roosevelt Lake|
GRAND COULEE DAM
Grand Coulee Dam is one of the largest concrete structures in the world. It contains nearly 12 million cubic yards of concrete and is the largest hydropower producer in the United States, generating more than 21 billion kilowatt-hours of electricity each year.
|The Grand Coulee Dam: Looking upstream from below the dam.|
|Looking north from the upper Wilbur Grade down to the Keller Ferry Crossing area of Lake Roosevelt. Mouth of the San Poil River, also known as the San Poil Arm is waterway in middle ground. Southern Kettle River Range are the background mountains.|
The Lake Roosevelt watershed drains 44,969 square miles, almost 88% of which originates in Canada. The water in Lake Roosevelt comes from glacial ice, lakes and precipitation base made up of mostly melting snow pack in the spring. Close to 89% of Lake Roosevelt’s water comes from the Columbia River. There are four additional rivers joining this inland waterway within the confines of the lake. They are, in order of occurrence; the Kettle River, the Colville River, the Spokane River and the San Poil River, with the Spokane being the largest of the four. Of the remaining water flow 7% comes from the Spokane River and 4% comes from a combination of the Kettle, Colville, and Sanpoil Rivers.
|The M/V SAN POIL approaching landing on the Ferry County side of Franklin D. Roosevelt Lake.|