This project involves implementation of Manfouha Sewage Treatment Plant in Riyadh - phase 4 will accommodate the increased flow of wastewater with an average daily flow capacity of 200,000 cubic meters/day to reach a full average daily flow capacity of 400,000 cubic meters/day. The plant will have average dry weather flow with peak factor of 1.6 in compliance with effluent, sludge and odor specifications. Local Contracting Company has been appointed as the main contractor.