Lake Preston Diesel Power Plant | South Dakota Peaking Facility

Lake Preston is a diesel power plant located in South Dakota, United States, with a capacity of 24.1 MW. Owned by Otter Tail Power Co, the facility is operational and serves as a peaking plant, providing electricity during periods of high demand. Diesel plants like Lake Preston are typically used for backup or peak load due to their quick start capabilities. The plant operates under the regulatory framework of the US Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and its National Ambient Air Quality Standards (NAAQS). As a diesel-fired facility, it is subject to emissions standards for sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter. The relatively small capacity of 24.1 MW places it in the small-scale category for power generation in the US. Lake Preston contributes to the local grid stability in South Dakota, particularly during peak demand periods. Its role as a peaking plant is significant for balancing intermittent renewable energy sources in the region. The facility's environmental footprint is managed through compliance with EPA regulations, ensuring emissions are within permitted limits.

The Lake Preston diesel plant operates in a rural area of South Dakota, with low population density. Diesel combustion emits CO2, SOx, NOx, and particulate matter, but the plant's small capacity (24.1 MW) limits its overall environmental impact. The facility is subject to EPA emissions standards under the Clean Air Act, including the Acid Rain Program for SO2 and NOx. Its role as a peaking plant means it operates intermittently, reducing annual emissions compared to baseload plants.