HARRISBURG, PA. — Gannett Fleming was ranked 47 of the top 100 green design firms for 2011 by GreenSource, a magazine about sustainable design. The list is based on design revenue from registered sustainable projects.

Among the projects that were important to Gannett Fleming’s green design revenue in 2011 were the Pennsylvania Air National Guard’s Air Support Operations Squadron (ASOS) Bed-down Facility in Annville, Pa., and the Defense Logistics Agency (DLA) reservoir replacement in New Cumberland, Pa. ASOS is LEED Silver certified and has renewable energy generation to reduce peak energy demand, high-efficiency water source heat pumps, and individual room temperature controls. The reservoir replacement incorporates high-efficiency pump motors and lighting systems and features a high percentage of recycled content.

GreenSource reports that although overall reported revenue of the top 500 design firms declined for a second year, revenues from the top 100 green design firms increased for the fourth year in a row. Green project revenue increased a dramatic 17.4 percent, valued at $3.3 billion. An increase in renovation work during this down economy, as well as a willingness of cost-conscious owners to invest in green technology to lower utility bills, were likely key in driving this growth.