Grand Coulee Dam...

in Washington state is a gravity dam on the Columbia River and is the second largest in the world, after the Three Gorges Dam in China. It was built to produce hydroelectric power and provide irrigation water. It was constructed between 1933 and 1942, originally with two power plants. A third power station was completed in 1974 to increase its energy production. It is the largest electric power-producing facility in the US.

We took the scenic drive back and crossed Lake Roosevelt/Columbia River on the local ferry and had it all to ourselves

Tomorrow we continue our journey east as we head for Yellowstone