On 20/03/2018 13:18, Andrew wrote:

There are asian offshore airfields built on reclaimed land that have to
be jacked up to keep them level. But the length of a runwayÂ* must make
that a tricky job.

I wonder why they bothered to make them so precisely flat. Airfield
runways don't need to be dead level. One end of the runway at Newcastle
Airport is about 30 foot higher than the other.

--
Mike Clarke