Mountain Lake Diesel Power Plant | Minnesota, USA

Mountain Lake is a diesel power plant located in Mountain Lake, Minnesota, United States. With a capacity of 9.2 MW, it is a small-scale facility serving the local community. The plant is owned and operated by the City of Mountain Lake and is currently operational. The plant uses oil as its primary fuel and operates as a diesel power plant. In the United States, such facilities are subject to the Clean Air Act (CAA) and its National Ambient Air Quality Standards (NAAQS), as well as regulations under the Acid Rain Program and Cross-State Air Pollution Rule (CSAPR) for emissions of SO2 and NOx. Diesel plants typically have higher emissions per MWh compared to natural gas combined cycle plants, but their small size limits overall impact. As a municipal utility asset, Mountain Lake plays a role in local energy reliability and peak shaving. Its location in rural Minnesota means it serves a small population, and its environmental footprint is managed through state and federal permits. The plant contributes to the community's energy independence and grid stability.

The plant's use of oil as fuel results in higher CO2, SOx, and NOx emissions per MWh compared to natural gas or renewable sources. Its small capacity (9.2 MW) limits overall emissions, but proximity to populated areas may raise local air quality concerns. The facility operates under US EPA regulations including the Clean Air Act and state-level permits, which set emission limits and monitoring requirements.