Ag College are now three points outside a finals berth as they continued their good run at a muddy Beres Ellwood Oval on Saturday.
Aggies closed the gap on Wagga City after scoring a 17-14 win.
Kate Pevere scored the first of her two tries to open the scoring for Wagga City but Ag College responded as Meg Seis scored her second to give them a 12-7 lead at half-time.
Pevere put the Boiled Lollies back in front seven minutes into the second half however with Tamara Thomas yellow carded Aggies took advantage as Rebekah Platts forced her way over with five minutes to play.
Coach Joe Fisher was thrilled with how Aggies adapted to the conditions.
"We changed a few things at training as we knew it was going to be wet and the girls did everything I wanted them to," Fisher said.
"It was very impressive."
Meanwhile Griffith extended their unbeaten season with a 39-0 win over CSU while second placed Waratahs took a 41-10 victory over Leeton.
Ag College now head to Griffith.
Fisher hopes the side can take plenty of confidence from another win up against the ladder leaders.
"It is definitely going to be the hardest match up for a while," he said. "The girls know we can win now so we'll put in the hard yards at training and work on a new game plan to put some points on Griffith."