On a national level, the Value to the Nation program calculates, by USACE program, estimates of the annual National Economic Development (NED) benefits of USACE infrastructure to the nation, net NED benefits, and impacts to the U.S. Treasury from project outputs and related economic activities associated with USACE Civil Works programs. Detailed descriptions of the methodologies used to calculate NED benefits for each business line are provided NED benefits for each business line are provided on the Computations and Sources page.