Subject house is on a Bay subject to tidal fluctuation. First Floor elev. is about 2-3 feet above MHW. Foundation is wood piles, garage slab seems to have a support wall that has failed, causing the non-bearing wall above to settle about 2 inches to date. May have been damage from a 1985 hurricane or any number or nor-easter type storms that have affected the site. I need to jack the wall back up to original position and attempt to support the garage slab, working in an extremely tight environment. Does anyone out there have any experience in these types of situations?