Great Beirut Water Supply Project.

This project involves the construction of pipelines for the transportation of water from the inland hills south
of Beirut (Joun) to Beirut city center (Hadat). The water comes from a hydroelectric power station that currently discharges into an existing water course running to the sea. More in detail, moving south to north, civil works will include the construction of a connection to an existing and currently unused tunnel, the construction of a discharge chamber, and the excavation of the first tunnel up to Ouardânîyé, where a water purifier (not included in this contract) will be built. From here, a second tunnel will depart to Damour, where an inverted syphon will be built, needed to cross a narrow valley. A third tunnel will then convey water to the village of Khalde (south suburban area of Beirut) and from there, through a cast iron twin pipeline installed in trenches, the Hadat tanks will be reached.

The project is divided into two large parts: tunnels with syphon in the hilly area and underground pipelines in the urban area. The tunnels (called drive 1, 2 3), having a length of km 8.10 - 10.37 - 4.13, respectively, will be excavated using a TBM. An inverted syphon having a drop of 140 m and a U-bend length (two inclined sections and one horizontal section) of approximately 1,140 m will be installed between drives 1 and 2, in Damour. The project will also include two 192 m and 278 m shafts. In the urban area, conversely, a cast iron twin pipeline will be installed. The pipeline will be installed in a trench excavated along the existing roads. Fiber optics as well as a SCADA system will also be installed along the entire path. 

Area

Beirut, Lebanon

Employer

CDR (Council for Development and Reconstruction)

Year

2015-2019

Sector

 Water and irrigation works