I went to the Port's open house when the third runway opened, and they said it would be used mainly for landings.
The landing noise contours are much smaller than those for takeoff. But the middle runway will be closed for re paving, so we're back to a two-runway airport for a while.
With all the Port's waste, fraud, and abuse that's been on the front pages, we'll have to take that with a grain of salt. And somewhere deep in the cellar, they're thinking of a fourth runway.
Jim Burrows
Burien