Baldia Trunk & Secondary Sewers ranging from diameter 200 mm to 1350 mm. Pipe-work of over 300 mm diameter with PVC lined to prevent internal corrosion (of total length approx. 37 km).
The Trunk Sewers were designed to carry all the wastewater from the city to the treatment plant. Lyari Trunk Sewer runs on the bank of Lyari River to Mauripur Sewerage Treatment Plant. Mauripur Sewage Treatment Plant was designed to treat all the wastewater carried out by these Trunk Sewers and then use this treated water for irrigation purpose also.
| Name of Work | Baldia Trunk and Secondary Sewers (Karachi-Sindh) |
| Country | Pakistan |
| Employer | Karachi Water & Sewerage Board (KW&SB) |
| Consultant | M/s. Balfours Internationals |
| Date of Award | December, 1993 |
| Date of Completion | September, 1998 |
| Scope of work | i) 37 Km Sewer Lines in Different Sizes 200 mm to 1350 mm Dia with P.V.C Linedii) Manholes 1033 No. |
