ZISTAB Consulting Engineers with more than 38 years experience has been successful in design, study, supervision, construction and management of more than 200,000 ha of irrigation and drainage networks, 20 storage dams, 90 km of long water conveyance tunnels, 500 km of transmission pipelines as well as more than 1.5 MCM of regulated water per year; and according to its national and international experiences is ready to present the engineering and technical services in the following activities: * Dam and Hydropower plants Construction * Tunneling * Irrigation and Drainage Networks * Urban Utility Tunnel and Infrastructure * Water and Wastewater Treatment Plants and Networks * Transmission Pipelines and Pump Stations * Urban Water Distribution and Collection Networks * Sprinkler and Drip Irrigation Systems * Social Studies and Public Participation * Environmental Studies * Financial and Economical Studies * Geographical Information System (GIS) * Operation, maintenance and safety control of dams * Operation and maintenance of irrigation and drainage networks * Operation of waste water facilities (Includes production, transmission and distribution of drinking water-drinking Water treatment plant-Wastewater treatment plant)