fillingWhen the embankment reached 4m in height, toe failure occurred. Subsequent hydraulic sand-filling work was temporarily suspended to prevent more toe failures from occurring at different locations of the embankment. From site inspection, the toe failure was believed to be caused by wash water transporting the hydraulic sand-fill at the top of the embankment at that stage of the construction, seeping downwards through the embankment sand-fill and building up of the embankment. the possibility of rapid and considerable build up of pore water pressure within the embankment during hydraulic sand-filling therefore needs to be investigated, and a remedial proposal is to be recommended