9 New Deal Infrastructure Projects That Changed America The Hoover Dam, LaGuardia Airport and the Bay Bridge were all part of FDR's New Deal investment. Author: Archive Photos/Getty Images The Hoover Dam, LaGuardia Airport and the Bay Bridge were all part of FDR's New Deal investment. The New Deal was a massive effort to lift the United States out of the Great Depression on several fronts. President Franklin D. Roosevelt’s plan created the Social Security Administration to protect older Americans financially, and used the Agricultural Adjustment Act to help farmers get out of debt. The New Deal also created new agencies to fund projects across the country that both improved communities and provided jobs at a time when unemployment was high.