split mash into two mash tuns. triple batch sparged each separately combining wort into single keggle for combined boil. 1.110/1.090 1st runnings
Based on boiling 14.00 gallonsliters at 1.056 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.