TAVAN-AB Consulting Engineers established in Tehran in May 1986. Having received the professional permit of consultancy in Water Engineering Services from the Plan and Budget Organization, the company started its activities. Based on currently enforced qualification classification , the company has been awarded the following grades: · Grade 1 in Irrigation & Drainage Networks · Grade 3 in Dams · Grade 3 in Water Supply & Wastewater Systems TAVAN-AB Consulting firm offers the expected water engineering consulting services in different following stages: - Planning (such as Sector Studies , Master Planning , Feasibility Studies , Site Evaluation , Project Optimization , Environmental and Social Impact Studies ). - Engineering (Project Studies , Detailed Design & Construction Drawing , Cost Estimates , Construction Scheduling , Specifications & Bidding Documents , Assessment of Tenders & Contract Negotiations With Suppliers and Contractors). - Construction management (Contract Administration , Field Supervision , Inspection & Quality Control and etc.). - Project Commissioning and Start-Up Assistance. A professional staff of about 120 highly trained engineers and technicians is ready to assist clients in investigation , planning , design and implementation of projects in different branches of water engineering. Up until now , more than 70 contracts have been awarded to the company , among them , about 50% are either in operation or under construction.