A quote: "-Food Initiative Coordinator Sam Kass called the beehive "probably the greatest acheivement of the garden."
Q. How much honey will I have?
A. Again, it really depends on a lot of factors, but you will definitely have enough to share once your hive really gets going. In my experience, the Backyard Hive will produce an average of 3 to 4 gallons of honey per year.
Analysis: The photo I've seen shows only the one hive, meaning it must have produced 12 gallons or so to reach the 140 pound mark.
I think Enid is a little doubtful herself, as she says: "The numerically magical White House Beehive"
[Afterthought: However skeptical one may be, I have to remember there's no beehives within miles of the WH, which means the bees have no competition. And there's a fair amount of flowers around, although hardly an almond orchard.]