Hey guys. My name is Josh. New here so go easy on me. I live in a 1000 sq ft (40x25) home in a rural area. I bought this home not knowing that it was built from remnants of an old school house back in the early 50's, when code wasn't enforced. The house sits on only one 40' girder with 4 brick columns. The floor sags on one side of the girder with noisy creeking on both sides. I also noticed a few stress cracks above doorways so I decided to do a post and beam installation with 6x6's and 2x10's on both sides of the girder to increase the structural integrity of this old house. I dug the first post hole and found ground water at 1'. What should I do about pouring concrete into the post holes that have ground water? Or if there is a better way of doing this let me know I wouldn't mind to start over. Any help would appreciated greatly. Thanks in advance.