to settle in a manner similar to that described with respect to fig9 a trench 40 is formed the length of liner 1 a footer element 41 is located in the trench and the area below footer element 41 is filled with a compressible material for purposes of an exemplary showing the footer element is illustrated in this instance as having a substantially rectangular cross section again footer element 41 will extend the length of liner 1 simply for purposes of illustration the edge of liner 1 is illustrated as being oriented perpendicular to the upper surface of footer 41 attachment of the liner to the footer again may be accomplished in any appropriate manner and again l shaped channel 11 and bolts 14 are illustrated the compressible material may be any of those mentioned with respect to fig2 and the material along with the size of the trench 40 the size of the footer 41 and the amount of material 42 will be chosen to provide the desired settling characteristics for liner 1 in all of the embodiments thus far described the liner should settle at a rate equal to or faster than the settling of the fill material the embodiments of the present invention fall within two categories those utilizing compressible material and those utilizing incompressible material when compressible material is utilized its compression characteristics and the amount of material used will be selected on the basis of the nature of the fill material.