FILE - In this April 14, 1945, file photo, the Grand Coulee dam, located about 100 miles north of Spokane, Wash., is shown. It was 75 years ago that folk singer Woody Guthrie traveled across Washington and Oregon, composing 26 songs that extolled the virtues of Grand Coulee Dam and the electricity it produced. It was one of the most productive months of Guthrie's career, and will be celebrated on Saturday, May 28, 2016, at the giant dam. (AP Photo/File)