Modern Marvels - Season 1 Episode 1
The world’s largest concrete dam–and the largest concrete structure in the world–lies on the Columbia River in the State of Washington. B uilt in 1931, it is also one of the largest hydroelectric power plants in the world.
- Thể loại: Documentary
- Studio: History, H2
- Từ khóa: technology, invention, disaster, construction, machine
- Diễn viên: