Airports

https://en.wikipedia.org/wiki/Seattle%E2%80%93Tacoma_International_Airport#History

Direction	Length		Surface
	ft	m
16L/34R	11,901	3,627	Concrete
16C/34C	9,426	2,873	Concrete
16R/34L	8,500	2,591	Concrete

https://en.wikipedia.org/wiki/Seattle%E2%80%93Tacoma_International_Airport#Operations