Structural design for energy centers

Pipe racks, process buildings and plant expansion

Tank foundations, process buildings and grain conveyor supports

Structural design for grain storage, including silos and bins

Structural design for grain receiving and ethanol load-out facilities

Civil/Site design

Piping design

Piping system expansion

Collection system expansion

Ductwork layout and design

Water treatment design

Road and railroad design

Registered in all 50 states, the District of Columbia, Puerto Rico, U.S. Virgin Islands, Mexico, 8 Canadian Provinces and 3 territories


Main plant and energy center structural design for 100 million gallon per year plants

Structural design of process buildings, tank foundations and pipe racks for 100 million gallon per year facilities

Structural design for several 40 million gallon per year plants including all tank foundations, water treatment buildings and an equipment platforms

High seismic structural design of process building, tank foundations and pipe racks for 100 million gallon per year facility

Tank farm layout and piping design for over 40 ethanol projects

Truck and rail load-out designs


Georgia - Norcross
Paul Douglas, P.E.

Wisconsin - Appleton
David Schwerbel, P.E.




The Renewable Fuels Association (RFA) estimates that fuel ethanol reduced the retail cost of every gallon of gasoline sold in the United States by $0.89 in 2012.

Larson Engineering contributed to this significant financial benefit by providing structural engineering related services to more than 50 ethanol plants located throughout the Midwest. Larson also provided limited electrical, HVAC and piping design services for multiple ethanol facilities.

Additionally, JJ Rouman & Associates, a firm acquired by Larson in 2012, designed process, process mechanical and piping systems and provided structural engineering for greenfield plants with an additional capacity of 290 million gallons per year.

The combined experience of Larson and Rouman equates to a contribution of engineering services  to over half of the ethanol plants built in the United States.