Perform detailed geotechnical investigation in the area with foundation problem such as surge shaft, and make stable designs for each concerned area, Remove all poor geological layers such as soft clay/highly weathered rock/highly fractured rock to prevent sliding problems, Design suitable slope and prevent construction in the weak or poor area, if necessary protection of soil/rock sliding is recommended, Set up the daily or weekly slope stability inspection upon the conditions of the concerned area, Monitor groundwater level and pore pressure by installation of peizometer wells at concerned structures, Set-up water quality and sedimentation monitoring program for surface water and shallow groundwater wells around the project area.