This week's #Dam: the Grand Coulee on the #Columbia #River System.

I've accumulated a pretty good set of my own images of dams on rivers across the North American West. For lack of other content to blog, I'm going to highlight a dam a week for the rest of the summer. This week, a pair of images from the Grand Coulee in north central Washington State. While the Chief Joseph Dam is the lowest impassable dam for migrating salmon, Grand Coulee was the original impassable dam, completed in 1941 (full Columbia hydrosystem map here and below). 

The spillway and power stations on the Grand Coulee
Roosevelt Lake
The Pacific Northwest hydrosystem and reservoir system.