I'm not sure where this is, but it seems unlikely that this is in the US - can you imagine the regulations it would be violating?
Using helicopters (wiki) to lift heavy stuff into those hard to reach areas is pretty common - the Chinook can lift 14 tons.
Speaking of moving stuff around, here's a Soviet MI-10:
From Popular Mechanics, 1951:
And then there's this:
Go see the whole gallery of huge helicopters at Dark Roasted Blend.