Tunnel Sadd Ariana Co. has received the following grades for contractor works from the Management and Planning Organization of Iran and the Municipality of Tehran:

• Grade 1 in the field of Transportation, Road, Highway and Railway Construction
• Grade 1 in the field of Water Resources, Dam and Hydropower Plant • Construction
• Grade 2 in the field of Civil structure and buildings
• Grade 3 in the field of Electrical and Mechanical Installations and Equipment
• Grade 5 in the field of Oil and Gas Installations and Equipment
• Grade 5 in the field of Land Surveying