Gowharrud Guilan Co. was established in the year 1991 for execution of the projects related to water and wastewater industry such as dam construction, irrigation networks, drinking water, wastewater , water power plants, digging of tunnels, erection of the related pumping stations, construction of heavy concrete buildings, construction of roads and transportation networks, import of every type of construction materials, tools, devices and machinery required for executive projects and also performance of all activities directly or indirectly related to each of the above-mentioned cases