In addition, the construction activities would require 50 m3/day of water for construction. Therefore, the project needs to be concerned about any changes in either quality or quantity of water caused by project activities. During construction, all efforts should be made to prevent sedimentation or contamination from cutting or clearing land causing a change in water quality in Nam Theun River. Water supply system must be prepared to ensure quantity of water is enough for all construction activities and not does not affect the water availabilty to local area. Septic tank must be prepared to collect wastewater in camp site without direct release into the river. In addition, clean water must be provided to the camps.