The parkway's original name was the Mount Vernon Memorial Highway. But Congress renamed it the George Washington Memorial Parkway in 1930, and authorized its extension to the "Great Falls of the Potomac River". The idea for a large George Washington Memorial Parkway came from Rep. Cramton, who introduced legislation in January 1929, to construct a larger system of roads and parks. In the US Senate, the bill was amended by Sen. Carter Glass to include a bridge across the Potomac at the Great Falls. Congress enacted the "Act of May 29, 1930" (46 Stat. 482)—more commonly known as the Capper-Cramton Act—to establish the George Washington Memorial Parkway. The Act appropriated $13.5 million to acquire land and build a Parkway on the Virginia southern shoreline from Mount Vernon to the Great Falls" (excluding the city of Alexandria), and to also build a parkway on the Maryland northern shoreline from Fort Washington, Maryland, to the Great Falls of the Potomac (excluding the District of Columbia). A bridge across the Potomac at or near the Great Falls was also included in the final bill. Included in the parkway were to be lands to extend the park and playground lands of the National Capital Parks system, and for the acquisition and preservation of the Patowmack Canal and a portion (below Point of Rocks) of the Chesapeake and Ohio Canal.