At the center of the community established by the Russians, Swedes, Norwegians, and Greeks who settled there in the late 19th and early 20th centuries was the Cascade School (built 1894; demolished after the 1949 Olympia earthquake), a public elementary school from which the neighborhood took its name. From the 1930s, South Lake Union became less residential, evolving into an area of small business, warehouses and auto-oriented services. Cascade slowly lost its identity as a neighborhood distinct from the rest of South Lake Union, especially after construction of Interstate 5 cut it off from Capitol Hill. When the Lake Washington Ship Canal opened in 1917, the locks at Ballard kept Lake Union at its historic level, while the canal gave it a water connection both to Lake Washington and to Puget Sound, an arm of the Pacific Ocean. This was a further boon to industrial and commercial development. Many timber-framed buildings survive from this era, with masonry exterior walls of brick or, for some commercial buildings, terracotta. For a time, the Cascade Neighborhood held numerous automobile dealerships; the surviving Ford McKay and Pacific McKay buildings are examples. Most of the city's large laundries were in the area, especially in Cascade although the large, surviving Troy Laundry Building (1927) is immediately west of Fairview Avenue E. These were soon joined by the Seattle Times Building (1930). In the early 1990s, The Seattle Times columnist John Hinterberger proposed redeveloping the area into a large green space something like New York's Central Park, loosely based on parts of Virgil Bogue's 1911 Bogue Plan. This plan became known as the and evolved to include mixed-income housing, retail, and commercial space on the park edges. Microsoft co-founder Paul Allen donated $20 million to buy property for the Seattle Commons, which reverted to his ownership after the proposal was defeated by public votes in 1995 and 1996. 21st century Only a few of the older residential and light industrial structures of historic Cascade Neighborhood retain their original uses today; the historic Immanuel Lutheran Church and Saint Spiridon Orthodox Cathedral remain. Within the boundaries of Cascade Neighborhood as of 2008 are the REI flagship store, NBBJ architects (in the Alley24 office and apartment development built around the landmark New Richmond Laundry Building), the headquarters of PEMCO, the Fred Hutchinson Cancer Research Center and the headquarters of Zymogenetics (in the old City Light Steam Plant). Elsewhere in South