Abstract: An adjustable erosion control wall includes a plurality of individual panels, each panel having a tongue projecting from one end and a groove formed in the opposing end. The panels of the retaining wall are pivotally and vertically slidably connected with the tongue of one panel engaged within the groove of an adjacent panel. Preferably, the tongue and groove have a generally cylindrical shape, and the panels have perforations therethrough of a diameter to permit water to flow therethrough but prevent the passage of soil therethrough.