Big Stone Coal Power Plant | South Dakota, United States

Big Stone is a coal-fired power plant located in South Dakota, United States, with a generating capacity of 451 megawatts (MW). Owned and operated by Otter Tail Power Co, the facility is currently operational and plays a role in the region's electricity supply. As a coal plant, it is part of the United States' diverse power generation mix. The plant operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and its associated programs such as the National Ambient Air Quality Standards (NAAQS), the Acid Rain Program, and the Cross-State Air Pollution Rule (CSAPR). These regulations govern emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), and other pollutants. The 451 MW capacity places Big Stone in the medium-to-large scale category for coal plants in the U.S. Environmental considerations for Big Stone include its coal fuel source, which results in CO2, SOx, and NOx emissions. The plant's location in a rural area of South Dakota may reduce direct population exposure, but its emissions contribute to regional air quality and climate impacts. Typical coal plants of this era operate with subcritical technology. The plant's role in the local grid and its compliance with evolving EPA standards are key aspects of its operational context.

Big Stone's coal fuel source results in significant CO2 emissions, contributing to climate change, as well as SOx and NOx emissions that affect local and regional air quality. The plant's location in a rural area of South Dakota may limit direct exposure to populated areas, but its emissions can travel and contribute to downwind pollution. The facility's capacity of 451 MW indicates a moderate environmental footprint compared to larger coal plants. Regulatory compliance with EPA programs like the Acid Rain Program and CSAPR is essential for managing its emissions.