Overview
Lower Granite is an 810 MW hydroelectric power plant operated by the USACE Northwestern Division in Washington State, USA. It provides renewable energy to the regional grid.
Lower Granite is a hydroelectric power plant located in Washington State, United States, operated by the USACE Northwestern Division. With a capacity of 810 MW, it is a large-scale facility within the hydroelectric sector, contributing significantly to the region's renewable energy generation. The plant utilizes hydroelectric technology, converting the kinetic energy of flowing water into electricity. As a run-of-river or dam-based facility, it operates with minimal fuel costs and low emissions. The USACE manages multiple hydroelectric projects in the Columbia River basin, ensuring reliable power generation and flood control. Environmentally, hydroelectric plants like Lower Granite produce no direct CO2, SOx, or NOx emissions, making them a clean energy source. However, they can impact aquatic ecosystems and fish migration. The facility plays a key role in the Pacific Northwest's energy mix, supporting grid stability and renewable energy goals.
Environmental context
Hydroelectric power generation has a low carbon footprint but can affect local aquatic habitats and fish populations. Lower Granite's location on the Snake River may involve fish passage considerations. The facility operates under US federal regulations, including the Clean Water Act and the National Environmental Policy Act, which govern water quality and environmental impact assessments.
Frequently asked questions
Lower Granite is located in Washington State, United States, on the Snake River. Its coordinates are approximately 46.66°N, 117.43°W.
Lower Granite has an installed capacity of 810 megawatts (MW), making it a large-scale hydroelectric facility.
Lower Granite is operated by the USACE Northwestern Division, a branch of the United States Army Corps of Engineers.
Hydroelectric plants in the USA must comply with the Clean Water Act, National Environmental Policy Act (NEPA), and the Federal Power Act. These regulations address water quality, fish passage, and environmental impact assessments.
Hydroelectric power produces no direct air emissions but can alter aquatic ecosystems, affect fish migration, and change water flow patterns. Mitigation measures like fish ladders are often implemented.