PSPSAC 2017-06-28 COMPLETE AGENDA PACKET

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Page 18 First is its geography. Tukwila lies in the upper Duwamish/Green River valley just south of Seattle; the river flows along the city's eastern side. A large portion of central Tukwila is in the river's flood plain. On the west side, the topography rises in a series of steep hills that require careful driving to navigate safely. The Puget Sound area is seismically active. The Cascadia fault is the shallow point of contact where the Juan de Fuca crustal plate is compressed as it slides under the North American crustal plate, in western Washington. Geologists have determined that the fault ruptures and releases this compression in 8 to 9 magnitude earthquakes once every 500 to 600 years. The last earthquake with a magnitude of 8 or greater occurred on January 26, 1700. The effects of earthquakes include surface rupture, ground shaking, liquefaction, and landslides on steep slopes. (US Geological Survey, Pacific Northwest geologic mapping and urban hazards) The second challenge is the road network. Interstate 5 bisects Tukwila north to south, with interchanges at Interstate 405/Highway 518 and at Highway 599. There are only three interchanges where fire apparatus can access the interstates to reach emergencies along them. The major streets that cross 1-5 include Macadam Road, South 133rd Street, and South 144th Street in the north, Southcenter Boulevard and Klickitat Drive in the central area, and South 176th Street in the south. As noted above, Tukwila is a thriving city. The third challenge is the daytime population, which swells to 150,000 as people arrive to work and shop. Westfield Southcenter is the Puget Sound area's largest retail mall, with more than two hundred stores and restaurants and a multiplex, and there is additional retail surrounding the mall. And there is room for significant growth; Segale Properties owns approximately 250 acres of buildable property in south Tukwila. The company plans to construct based on market indications of what is needed over the next several years. Industry is the fourth challenge. Boeing Corporation has the most employees, with 7,572 in four major divisions located in the northern end of Tukwila, including a manufacturing center and airport. Many of these manufacturing facilities use hazardous materials in their processes. In addition, there are several internet and corporate datacenters located near Boeing Field. Costco Warehouse #2, with 703 employees, is in central Tukwila. There is not a hospital located in Tukwila. Finally, transportation of goods, especially hazardous materials, is a challenge in Tukwila. A sixty -inch diameter pipe carrying jet fuel crosses the city on its way to Sea - Tac International Airport. Rail lines along the eastern border of the city carry Amtrak passenger trains as well as freight, including tank cars with crude oil. In addition to these hazards, commercial, military and private aircraft take off and land at Sea -Tac airport, less than five miles away from Tukwila. Tukwila Fire Department routinely provides automatic aid to the Sea -Tac airport. These challenges require fire protection and emergency services resources beyond what would be typical for a city of Tukwila's size and population. Tukwila Fire Tukwila Fire Department — Station Location Study June 2017