Imperium Renewables (formerly Seattle Biodiesel) selected JH Kelly to construct it's first 100 million gallon per year biodiesel production plant in Aberdeen, Washington. The plant, completed in August 2007, is the largest biodiesel production facility in the United States. Imperium has succesfully operated Seattle Biodiesel, a five million gallon per year plant in the Industrial Area of Seattle since April 2005, having developed their own proprietary process for refining biodiesel. JH Kelly broke ground on the project late summer 2006, starting with the tank farm area. The tank farm has roughly 16 million gallons of fuel storage capacity.

• 100 million gallons per year production capacity
• Largest biodiesel plant in the United States
• Completed in August 2007