Western Tehran Sanitation Project – Wastewater transmission tunnel Client: Water and Sewerage Department of Tehran Province \ Consultant: Lar Consulting Engineers \ Partner consultant: Aban Pazhouh Consulting Engineers company Status In Progress Tehran-West Wastewater Mechanized Tunnel project Geography Location Description Construction of wastewater conveyance tunnel of Tehran western part with a length of 12 km and finished diameter of 3 m excavated using Tunnel Boring Machine (TBM)as well as ocnstruction of 15 nos of Shaft, manholes and Segment factory.