- Part
- c. 1950
Part of Postcard Collection
- Preliminary plans for the Grand Coulee Dam were made in the early 1920's, but the dam itself was not completed until 1941. The powerhouses and pumping plants were worked on during World War II and completed by 1946. 12 million cubic yards of concrete were used in the project, making it the largest concrete structure in the world. circa 1950.
- Printed on front: The mighty Columbia River is harnessed at Grand Coulee Dam.