The Grand Coulee Dam is a massive concrete structure located on the Columbia River in Washington State. Completed in 1942, it is one of the largest concrete dams in the United States and plays a crucial role in hydroelectric power generation. The dam has a total generating capacity of over 6,800 megawatts, making it a significant source of electricity for the region. In addition to power generation, the Grand Coulee Dam also provides irrigation for agriculture in the surrounding areas. It is part of the larger Columbia Basin Project, which aims to manage water resources for farming and flood control. The dam's construction significantly transformed the landscape and economy of the region.