Boxcars full of cement

Cement for the building of Grand Coulee Dam was hauled in by the boxcar full. Thousands of loads were needed for the project. When it was done, the North Dam was built, along with Dry Falls Dam, and what we know as Banks Lake was filled with water. This inundated most of the old railroad grade. When time came to build the Third Powerhouse, how was all this cement going to get to the dam? By rail,...