Congress gave authority to the United States Army Corps of Engineers to take over operation and maintenance of the canal. Work began to effect badly needed improvements: widening and deepening the canal, and constructing new bridges. The modernization of the Cape Cod Canal became a public works program. Leisure would complement commerce. A sprawling federal government acted like a die grinder to temper the sharp edges of the Gilded Age. Power shifted away from unbridled titans to Washington bureaucrats. 

The new and improved canal was squarely a by-product of progressive policies put into place during the Great Depression. New Deal programs like the Public Works Administration, Emergency Relief Act, and Rivers and Harbors Act in the mid-1930s helped finance the $37,000,000 cost. Several hundred workers helped build the two distinctive vehicular bridges and unique vertical-lift Railroad Bridge, still standing and functioning 84 years later. Toll free. 

Perhaps fittingly, a black and white postcard of the sparkling new Sagamore Bridge dated June 22, 1935 (the official dedication of the rebuilt canal) noted that “Mrs. August Belmont parted the ribbon.”