I found (copied and then lost the original source) what seems like a good AG clone recipe for Bell's Two Hearted Ale. The grain bill seems fine, but the hop boil times seem odd to me. Here are I hope, enough details to provide context for my question, do this hop addition schedule make sense?
Total boil 75 minutes, 8 gallon boil for 6 gallons hopped wort at 58 OG, all Centennial hops, target of about 45 IBUs total, based on 7.7 % AA hops.
Boil time Hop quantity IBUs
60 min 0.46 oz. 9.8
20 1.84 23.6
5 2.75 11.6
10 1.80 Aroma hops steep (10 minutes steep after knockout?)
Anyone follow this recipe? I am a bit baffled by the low amount of hops boiled for 60 minutes, and wonder why this is the case. If anyone reading this claims this recipe, I'd love to hear from you on why the large amount of late additions.