It's probably from the fact that the asphalt and/or concrete settles from
use and general settling (the former more than the latter). Much like a road
that eventually develops the speedbump-type elevations at the expansion
joints. The fact that "expansion" joints are needed and are named as such
should tell the entire story. I would even imagine that the runway length
expands soon after it's completed, again from the settling.

Marco



"Ace Pilot" wrote in message
om...
Can anyone explain why runway lengths are sometimes "X thousand and
ONE feet" in length? I was just looking through a list of Iowa's
approximately 110 airports and 7 of them have runways that are "X
thousand and one feet" long.

Do runway manufacturing companies offer special deals like "Buy 5,000
feet of runway, get your next foot free!!!"

There's got to be a logical explanation - anyone know it?



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