The past few weeks have seen a great deal of progress in installing concrete retaining walls in both Astor House’s north and south basements. The North Basement is the oldest basement in the building and has brick walls along most of its perimeter. Years of water intrusion has eroded bricks into sand and the earthen walls could potentially collapse. The South Basement was hand-dug in the 1920s for a furnace. The walls were completely soil and were sloughing debris endangering the foundation. Both basements are getting new concrete retaining walls, draining systems, and adequate stairs.