Implementation of the McMillan Plan was opposed by the powerful
Speaker of the House,
Joseph Gurney Cannon. Cannon was angry that the Senate had bypassed the House in creating the commission. He was strongly opposed to spending the enormous sums that it would take to complete the plan. Although Moore had implemented a carefully planned public relations campaign to win congressional and public support for the McMillan Plan, it was clear that seeking formal approval of the plan from Congress was out of the question due to Cannon's opposition. Instead, members of the commission worked strenuously to ensure that the plan was not encroached upon while waiting for a more opportune time to seek its implementation. Backers of the plan in Congress regularly called upon commission members to testify before Congress and in public hearings to defend the plan. One of the most important goals of the McMillan Plan was to demolish the B&P Railroad Passenger Terminal. This proposal had generated widespread support in Congress for years. On May 15, 1902, legislation was passed authorizing the construction of a new Union Station. Although extensive disagreement broke out in the House over reimbursing the Pennsylvania Railroad for the cost of moving its tracks, legislation providing this reimbursement passed in 1903. The terminal was demolished in 1908. The first significant threat to implementing the McMillan Plan came in 1904. A new
United States Department of Agriculture building had long been proposed for the south side of the National Mall between 7th and 14th Streets SW. The Department of Agriculture wanted to use all the space allotted to it. However, McMillan Plan advocates argued that agriculture headquarters should be set back from the center of the National Mall by . Department of Agriculture officials, however, pointed out that the setback from the mall's center-line was already violated on the south side of the mall by the
Smithsonian Institution Building. President
Theodore Roosevelt gave his approval for the construction of a new agriculture building in line with the Smithsonian headquarters, only to later learn that his decision violated the McMillan Plan (which he also supported). Agriculture officials then argued that if they had to accept a smaller plot of land, they should be permitted to construct a taller building to compensate for the loss of space. An extensive disagreement broke out between Agriculture officials, members of Congress intent on keeping costs low, McMillan Plan advocates, and others about where the building should be placed and how tall it should be. The new Agriculture Building was eventually built according to the McMillan Plan's setback line and slightly lowered into the ground to accommodate the building's taller height. The next major test of the McMillan Plan came with the siting of the Lincoln Memorial. Congress authorized a Lincoln Memorial Commission in 1910, and the commission immediately began wrestling with the many competing proposals for the memorial's location. Concurrently, members of the disbanded McMillan Commission were tiring of the constant demands on their time and the unpaid nature of their role. President Roosevelt agreed that a permanent commission on the arts should be created to help guide decisions regarding art and architecture following the McMillan Plan. Roosevelt established a commission by executive order shortly before he left office, but President
William Howard Taft dissolved it and won congressional approval for a statutory
United States Commission of Fine Arts (CFA) in 1910. Several members of the McMillan Commission were appointed to the CFA, as were many McMillan Plan supporters. When the Lincoln Memorial Commission found itself riven by disagreement over the new memorial's site, it sought out the advice of the CFA. Together, the Lincoln Memorial Commission and CFA worked to approve West Potomac Park as the site for the new monument. The site for the Lincoln Memorial was approved in June 1911. Over the years, other decisions were made which helped reinforce the status of the McMillan plan as the "official" development plan for the District of Columbia. These included the siting of the
Freer Gallery of Art in 1923, the creation of the
National Capital Park and Planning Commission in 1926 (which was formally charged with implementing the McMillan Plan), enactment of legislation authorizing the enlargement of the Capitol grounds in 1929 (following the McMillan Plan), and passage of the Capper-Cramton city park act (which sought to implement the McMillan Plan's park program). Arlington Memorial Bridge was authorized in 1925 after President
Warren G. Harding got caught in a three-hour traffic jam during the dedication of the
Tomb of the Unknown Soldier. A lengthy fight over the bridge's location occurred. However, the CFA won the battle. Congress authorized the bridge's construction (in the low, classical style advocated by the McMillan Plan) on February 24, 1925. The
Public Buildings Act of 1926 authorized the razing of the Murder Bay slum and the construction of
Federal Triangle in 1926, and the
Mount Vernon Memorial Parkway was authorized in 1928. Although construction of a massive terrace around the base of the Washington Monument was proven unfeasible (it would have destabilized the monument's foundations), the
National World War II Memorial was constructed at the eastern end of the Lincoln Memorial reflecting pool in 2004.
Recent implementation efforts The McMillan Plan continues to provide the underpinning for planning in the national capital in the 21st century. In 1997, the National Capital Planning Commission (NCPC) issued a report entitled ''Extending the Legacy: Planning America's Capital
. The planning document was an attempt to update the McMillan Plan for the 21st century. It redefined the monumental core and established new guidelines for locating museums, memorials, and federal buildings throughout the city. A second major report, Monumental Core Framework Plan: Connecting New Destinations with the National Mall'', was issued in April 2009. Written jointly by the NCPC and CFA, the planning document extends the McMillan Plan's values and planning concepts through the city. It proposed the creation of new "federal centers" through the city (away from the monumental core) and redevelopment of the
Washington Channel and Anacostia River waterfronts. A second planning effort, CapitalSpace, was also launched in 2009. A joint initiative of the NCPC, the
National Park Service, and the government of the District of Columbia, CapitalSpace is designed to implement six of the major unfinished proposals of the McMillan Plan. These include linking the Fort Circle Parks with trails and parkways, improving recreational facilities, enhancing and maintaining neighborhood parks, establishing new and repairing existing playgrounds and school play yards, ensuring the protection and restoration of natural areas within and near the city, and transforming small and underutilized parks into vibrant new neighborhood centers. In late 2012, work began on two billion-dollar projects to implement ''Extending the Legacy: Planning America's Capital'' were announced. The first project, named "The Wharf", is a $1.45 billion redevelopment of the waterfront roughly between 9th and 7th Streets SW along the
Washington Channel. The project will build 10
mixed-use buildings each high. A privately owned cultural center and a new public park will be included in The Wharf. A total of will be built, with about two-thirds of that built in the first phase.
Maine Avenue SW will be remodeled, Water Street SW will be decommissioned and demolished, a pedestrian promenade built where Water Street was, and two new piers (for both private and commercial use) will be constructed. The second project announced is a $906 million project to replace and realign the aging
Frederick Douglass Memorial Bridge and build new interchanges between the bridge and
Suitland Parkway, the bridge and Potomac Avenue SW, Suitland Parkway and
Interstate 295, and Suitland Parkway and
Martin Luther King Jr. Avenue. The current four-lane bridge will be replaced with a six-lane bridge and brought into a more north–south alignment from its current northwest–southeast alignment. The cost of the bridge replacement is estimated at $573.8 million. A
traffic circle with a large field (to be used for public gatherings and suitable for several new memorials) will connect the north end of the bridge with Potomac Avenue SW. A second massive traffic oval on the south end of the bridge will help connect it to Martin Luther King Jr. Avenue and help expand the city's "monumental core" into Anacostia. Reconstruction of the two interchanges is estimated to cost $209.2 million. The remainder of the budgeted funds will help remodel South Capitol Street into an urban boulevard from an industrial corridor, and renovate New Jersey Avenue SE. ==Unbuilt portions ==