5G Strike Water. 5G Sparge. Resulted in 7.7G. @ 13 brix. boiled to about 7G. Fermented @66F. Added first dry hops on 7/30 (1Oz Citra 1 Oz Mosaic).
Based on boiling 7.70 gallonsliters at 1.053 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.060. You wanted an OG of 1.066. It looks like it will be under.