Consultancy services for the design and construction of the eastern tunnel part of the alternative drinking water transfer system of Alborz and Tehran provinces from Taleghan dam Project name: Consultancy services for the design and construction of the eastern tunnel part of the alternative drinking water transfer system of Alborz and Tehran provinces from Taleghan dam Status Future Registration Date 2024/07/07 Update Date 2024/07/07 Manager Tehran Regional Water Company Goals Transfer of drinking water of Alborz and Tehran provinces from Taleghan Dam Schedule 3nd Phase Studies Executive Actions Tunnel length: 16.5 km Drilling with type TB.45E/TS mechanized drilling machine with segmentation to the finished diameter of 8.3 meters Hexagonal segment type, the number of parts in each ring is 4 pieces with a length of 3.1 meters Traditional drilling 980 meters long The exit structure of the tunnel construction to the Karaj River Geography Location Alborz/ Amirkabir Dam