Clark (SD) Diesel Power Plant - South Dakota, United States

Clark (SD) is a small-scale diesel power plant located in South Dakota, United States, with a capacity of 2.7 MW. The facility is owned and operated by NorthWestern Energy and is currently operational. As a diesel-fired plant, it serves as a peaking unit, providing electricity during periods of high demand or when renewable sources are insufficient. The plant operates under the regulatory framework of the United States Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and its National Ambient Air Quality Standards (NAAQS). Diesel engines are subject to emissions standards for nitrogen oxides (NOx), particulate matter (PM), and sulfur dioxide (SO2). The facility's small capacity and intermittent operation likely reduce its overall environmental footprint compared to larger baseload plants. Clark (SD) plays a role in maintaining grid reliability in the region, particularly during peak load events or emergencies. Its location in rural South Dakota supports local energy needs, and its operation by NorthWestern Energy ensures integration with the broader regional power system. The plant's diesel technology, while less common for baseload generation, remains important for grid stability and backup power.

The Clark (SD) diesel plant, with a capacity of 2.7 MW, operates on oil, which results in emissions of CO2, NOx, SO2, and particulate matter. Its small scale and likely intermittent use reduce its overall environmental impact compared to larger fossil fuel plants. The facility is situated in a rural area of South Dakota, minimizing direct exposure to dense populations. Regulatory compliance with EPA emissions standards helps mitigate local air quality effects.