Overview
Grand Coulee is a 6,809 MW hydroelectric power plant in Washington, USA, operated by the U.S. Bureau of Reclamation. It is one of the largest hydropower facilities in the world.
Grand Coulee is a massive hydroelectric power plant located in Washington State, United States, with a capacity of 6,809 megawatts. Operated by the U.S. Bureau of Reclamation, it is a cornerstone of the Pacific Northwest's power grid. The facility harnesses the Columbia River's flow to generate clean, renewable electricity. The plant's immense scale places it among the largest hydropower stations globally. Hydroelectric power is a mature, low-carbon technology, and Grand Coulee benefits from the region's abundant water resources. The facility operates under Federal Energy Regulatory Commission (FERC) oversight and complies with environmental regulations including the Clean Water Act. Grand Coulee plays a critical role in regional grid stability, providing baseload power and peaking capacity. Its reservoir also supports irrigation and flood control. The plant's long operational history and high capacity make it a key asset in the U.S. renewable energy portfolio.
Environmental context
As a hydroelectric facility, Grand Coulee produces no direct CO2, SOx, or NOx emissions, offering a low-carbon footprint compared to fossil fuel plants. However, the large reservoir can alter local aquatic ecosystems and water flow regimes. The plant's location in a sparsely populated area reduces human exposure to any operational risks. Its age and technology are well-established, with ongoing upgrades to enhance efficiency and environmental performance.
Frequently asked questions
Grand Coulee is located in Washington State, USA, on the Columbia River.
Grand Coulee has a capacity of 6,809 megawatts, making it one of the largest hydroelectric plants in the world.
Grand Coulee is operated by the U.S. Bureau of Reclamation.
Hydroelectric plants in the USA must comply with the Clean Water Act, the National Environmental Policy Act (NEPA), and FERC licensing requirements, which include environmental impact assessments and fish passage measures.
Grand Coulee provides baseload and peaking power to the Pacific Northwest, supporting grid stability and integrating with other renewable sources.