If there is a need for tunnelling, deep excavations for large buildings and underground parking structures, and sites with toxic waste and polluted groundwater, we undisputedly choose the cut-off wall process. It is creating a low-permeability underground barrier, constructed to control the flow of groundwater. This method of ground engineering in Bahrain helps to control seepage and cut away landfills from the site. Most of the companies use cement bentonite trench, sheet piling, and grouting methods to erect the cut-off wall.