Allegheny Energy Units 3, 4 & 5 Gas Power Plant, Pennsylvania, USA

Allegheny Energy Units 3, 4 & 5 is a gas-fired power generation facility located in Pennsylvania, United States. With a capacity of 556 MW, it falls within the medium-to-large scale for gas power plants in the country. The plant is owned and operated by Springdale Energy LLC and is currently operational. The facility operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and its National Ambient Air Quality Standards (NAAQS). As a gas-fired plant, it benefits from lower emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) compared to coal-fired units, though it still contributes to carbon dioxide (CO2) emissions. The plant's technology is typical for modern gas power generation, likely utilizing combined-cycle or simple-cycle gas turbines. Allegheny Energy Units 3, 4 & 5 plays a role in meeting regional electricity demand, particularly during peak periods. Its location in Pennsylvania supports the state's energy mix, which includes a significant share of natural gas. The plant's operational status and capacity contribute to grid reliability and energy security in the region.

The plant's gas-fired operation results in lower SOx and NOx emissions compared to coal, but CO2 emissions remain a concern. Located in Pennsylvania, the facility is subject to EPA regulations under the Clean Air Act. Its proximity to populated areas may influence local air quality, though modern gas technology typically reduces particulate matter and other pollutants.