Good job.
But i'm not sure how a person on the front desk phones and especially (strike me down for saying this) a "sister" would have knowledge of what is or is not going on with construction miles away from her location on a day by day basis.
So she said it had stopped 1st time around. maybe she'd heard rumours or talk and accidentally passed it on in a moment of personal honesty. It could still be just rumours and talk and not set in stone fact.
Maybe they thought they were going to be shut down and later got the confirmation that this was not the case.
Or maybe they had confirmation it was to be stopped and no leaks were to be made and so the front desk team are now behaving as expected and denying it.
Confirmation isnt always confirmation, just as denials dont always mean what they say they mean.
I think if you want confirmation you need to know someone who is high up at the site, or else rock up there and see what you find out.