Colchester 16 Diesel Power Plant | Vermont, USA

Colchester 16 is a diesel power plant located in Colchester, Vermont, United States, with a capacity of 18 MW. Owned by Green Mountain Power Corp, the facility operates as a peaking plant, supporting grid stability during periods of high demand. Its location in the northeastern US places it within a region that relies on a mix of hydro, nuclear, and natural gas for baseload power. The plant uses oil as its primary fuel, a common choice for peaking plants due to its energy density and quick-start capability. While diesel engines are efficient for short-term operation, they produce higher CO2 and particulate emissions per MWh compared to natural gas. Typical diesel plants of this scale use reciprocating engines. As part of Vermont's energy landscape, Colchester 16 contributes to grid reliability, especially during winter peaks. The plant operates under US EPA regulations, including the Clean Air Act, which sets emission limits for NOx, SO2, and particulate matter. Its relatively small capacity means it plays a niche role in the broader power generation mix.

The plant's use of oil as fuel results in higher CO2 and SOx emissions per unit of electricity compared to natural gas. Its location in Vermont, a state with ambitious renewable energy goals, places it under scrutiny for its carbon footprint. The facility's proximity to populated areas may raise local air quality concerns, though it operates only during peak demand periods, limiting its overall environmental impact.