Prince Salman bin Abdul-Aziz, the Governor of Riyadh Region and Chairman of High Commission for the Development of ArRiyadh signed here today a SR47 Million contract with Al-Yamamah company to develop the infrastructure of Old Dereyah including Turaif area. The project includes paving and illuminating main roads and footpaths and water, electricity and telecommunication networks, said Abdullatif Bin Abdulmalik Alshaikh, a member of the High Commission for the Development of Arriyadh and President of Arriyadh Development Authority.