It is observed that the water table is very high near the shoreline especially on the naval platform area in the north. A ditch in excavated earth below grade near the shoreline shall not only have continuous presence of water in it but also generate currents in the ditch from the tidal waves. The 3m deep excavation traversing the platform from one side to the other might also result in unknown consequences like destabilising the man made platform. It is deemed beneficial that the ditch be constructed above grade as shown in the attached sketch such that the precast security wall and the two walls of the ditch stand at the same elevation, creating three layers of physical obstruction. Kaust concurrence is sought to implement this solution in the northen part of the security corridor.