Downtown Portland is the city center of Portland, Oregon, United States. It is on the west bank of the Willamette River in the northeastern corner of the southwest section of the city and where most of the city's high-rise buildings are found. The downtown neighborhood extends west from the Willamette to Interstate 405 and south from Burnside Street to just south of the Portland State University campus (also bounded by I-405), except for a part of northeastern portion north of SW Harvey Milk Street and east of SW 3rd Ave that belongs to the Old Town Chinatown neighborhood. High-density business and residential districts near downtown include the Lloyd District, across the river from the northern part of downtown, and the South Waterfront area, just south of downtown in the South Portland neighborhood. Portland's downtown features narrow streets— wide—and square, compact blocks on a side, to create more corner lots that were expected to be more valuable. The small blocks also made downtown Portland pleasant to walk through. The long combined blocks divide one mile (1.6 km) of road into exactly 20 separate blocks. By comparison, Seattle's blocks are , and Manhattan's east–west streets are divided into blocks that are from long. Urban development 1900s By the early 1970s, parts of Portland's central city had been in decay for some time. New suburban shopping malls in the neighboring cities of Beaverton, Tigard, and Gresham competed with downtown for people and money. Unlike many downtown revitalization efforts around the United States at this time, Portland's plan did not call for widespread demolition and reconstruction. Robert Moses, the designer of New York City's gridded freeways, expressways, and bridges, designed a plan to revitalize downtown Portland. Moses charted a highway loop around the city's central freeways, which would become Interstate 405 as it links with I-5 south of downtown. Additionally the creation of a downtown transit mall in 1977, a new waterfront park in 1978 (later named after Governor Tom McCall) in place of a freeway, the creation of the Pioneer Courthouse Square in 1984, the opening of the Portland–Gresham light rail line in 1986, and the opening of Pioneer Place mall in 1990 successfully drew or retained businesses and lured customers. After 1990, downtown Portland dominated the city's development, with more development there than on the east side (Lloyd District, Central Eastside Industrial District, and Lower Albina). 2000s Downtown Portland has many surface