Abstract: A method for providing on a landscape a series of terraces with augmented availability of usable level surface comprising: providing an upper substantially level surface on at least one portion of said landscape; providing one or more gallery support members on the said upper level surface, each said gallery support member comprising a downwardly open upper load bearing shell defining an internal gallery volume and enclosing a first portion of said upper level surface, and further comprising at least one gallery opening in communication with a second portion of said level upper surface; depositing a quantity of landfill material over said at least one gallery support member and over at least a portion of said upper level surface, not including said first and second portions thereof, to a predetermined depth and substantially leveling at least a portion of said landfill material to provide an uppermost terrace comprising an upper level surface; optionally providing a new uppermost terrace on said uppermost ter