Grand Coulee Dam is one powerful concrete monolith!

April 29th, 2012 Construction of the Grand Coulee Dam in Eastern Washington began in 1933 and it was completed in 1942. The dam is one of the largest concrete structures in the world at 167 metres / 55o feet tall, 1592 metres /5223 feet wide, with 12 million cubic feet of concrete. This is enough concrete…