I'm just starting to prep the beds for this year's Atlantic Giants. I'll post a proper picture of the hole tomorrow, but here's what I dug out while broadforking an approximately 15' x 15' area:

That one that I couldn't get into the wheelbarrow is probably close to 75 lbs.
So I'm going to double-dig the innermost ~6' x 6' of the plot, and till a bunch of manure and stuff into the whole patch. And then do it again on the other side of the yard.
Last year's largest was 142 lbs. Hoping for larger this year!