Based on boiling 17.00 gallonsliters at 1.054 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.057. You wanted an OG of 1.062. It looks like it will be under.
Not bad. Not really what I was going for. More chocolate/roasty flavour than anything else. No coffee flavour whatsoever. Still very tasty though