boulevard had no streets crossing it and extending eastward, and thus, the Jackson intersection was a T intersection. This was still true in 1920 when the Michigan Avenue Bridge opened and increased traffic by connecting this boulevard with the Magnificent Mile and the community north of the Chicago River a quarter mile to the north of this district. The Fountain of the Great Lakes (installed in 1913) was highly visible from route center. Today, four streets cross Michigan Avenue within the district (in addition to its northern and southern endpoints at crossing streets). Two of the four change names as they cross Michigan: eastbound East Monroe Street (100 south) becomes East Monroe Drive; and eastbound East Jackson Boulevard (300 south) becomes East Jackson Drive. Two-way East Ida B. Wells Drive (500 south) and East Balbo Drive (700 south) do not change names as they cross Michigan Ave. Today Today the only building on the eastern side of Michigan Avenue in the Historic District hosts the Art Institute of Chicago. However, several interesting structures have been added to the northern part of the eastern side of Michigan Avenue in Millennium Park such as Crown Fountain and McCormick Tribune Plaza. The current "End Historic US 66" marker is now located along Michigan Avenue in this district to mark the official end of U.S. Route 66 in Illinois, but this and several others traverse Michigan Avenue within Grant Park because landfill has created two blocks of real estate between Michigan Avenue and the Lake Michigan shoreline. Also, the Fountain was relocated and is no longer easily seen from Michigan Avenue. Among the current issues today is the trend to redevelop properties by constructing grand towers behind the facades of historic structures along Michigan and Wabash Avenues (the parallel street one block to the west). The most recent examples of this have been The Heritage at Millennium Park, Legacy at Millennium Park and the 80-story tower proposed as part of the YWCA building redevelopment at 830 S. Michigan Avenue. This trend is now endangering the Chicago Athletic Association Annex, which has been proposed for demolition to make way for a fifty- to eighty-story condominium tower across from Millennium Park. As a result, the building is listed first on the 2006-07 Chicagoland Watch List of the Landmarks Preservation Council of Illinois. On the other hand, many were concerned that the landmark district designation would stagnate