Hi all.  I'm new to GalCiv2 and was wondering what the 'Construction Time' is on a Mining Base that has been created on an Asteroid Belt.

I sent my mining ship to an asteroid, it built a base, and I've assigned the base to a planet.  I understand the base gives a boost to the production, but I'm not sure what the 'construction time' is.  Both my bases say the construction time is 10 weeks, and that number doesn't seem to change.  Another civ I found has a base with a construction time of 1 week.

Thanks for your help.