Abstract: An earth-retaining concrete module and an interlocked earth-retaining terraced wall system employing such modules to stabilize earthen embankments and to reduce erosion from wave action. The module comprises an upright front wall and connecting side walls which form a U-shaped structure open at the top and adapted to receive fill material therein. The side walls of the module have at least one open notch in the top of each side wall, adapted to accept in an interlocked manner the width of the bottom of the front wall of a module in the next higher row in the wall system. The module includes a plurality of holes in the side walls to permit the side walls of adjoining modules to be secured together by pins or bolts. The side walls have inward-positioned wing side walls extending from the center of the side walls toward the rear of the side walls to place the center of gravity of the module toward the rear of the module.

Abstract: An earth-retaining module for use in an interlocked, earth-retaining wall system, and to a method of preparing an earth-retaining wall system, wherein the module comprises a front wall and side walls, to form a structure to receive earth or sand therein, the side walls having a rear, straight, sloped, side section extending from the top of the side walls to a defined height of the rear of the side walls. The side walls have open notches in the top sections therein and longitudinally aligned, to permit the insertion of the front-wall section of another module in a higher row within the open notches. The side walls have inward, rear projections, to retain a dead-man slab element, with the removable dead-man slab element placed on the rear-mounting side walls. The module includes a plurality of holes in the side walls, to permit the side walls of adjoining modules to be secured together by pins or bolts.