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Power Stations and Tunnels

Hydroelectric Supply – Power Stations and Tunnels



Geographical Locations – Power Plants


Ibrahim Abd El Al/Markaba Power Station


Geographic Location
  • The station is located 660 m above sea level, 11 km away from the lake.
  • It was fully constructed inside a rocky mountain and became operational in 1962.
Qaraoun-Markaba Tunnel
  • It takes water in from the Qaraoun lake through Markaba tunnel, which extends 6400m underground along the right riverbank.
  • It is connected to the power station by means of a steel penstock of a maximum discharge capacity of 22 m3/s.
  • It includes two power generation units with an individual power supply equal to 17 megawatts, and a vertical Francis turbine.
  • The overall power supply capacity of the power station is: 17 x 2 MW= 34 mW


Boulous Arqash Station (Awali)


Geographic Location
  • It is located in the basin of Bisri River, on the Western riverbank at 228.50 m above sea level. Its waterfall is located at an altitude of 400 m.
    It was completed and became operational in 1965 with two units only, but a third was added in 1981.
Awali Tunnel

It draws water from the Qaraoun lake after it comes out from the turbines of Abd El Al station, where it joins the water of Ain Zarqa spring, Nahr ech Cheta stream, and other springs, through a 17-km tunnel crossing Jabal Niha-Jezzine all the way to Anan lake.

Anane Lake
  • The Anan lake is located directly above the power station at 615m above sea level.
  • Its capacity ranges between 150,000 and 170,000 m3.
  • It supplies the power station with water via a steel penstock with a discharge rate of 33 m3/s.
  • The power station system includes three units, each with a power supply of 36 MW, equipped with a water pelton turbine with vertical axe. The overall power supply of the power plant is: 36 MW x 3 = 108 MW
  • It is considered the number one power station in Lebanon for the production of hydroelectric power, in terms of the individual power of each of its 3 units and its basic role in regulating the frequency of the public transportation network related to the difference in consumption needs, within its power supply capacity.
  • This power station is considered a central plant for housing the power produced in the three Litani power stations to control production and streamline the function of the electric generators to properly transfer the produced power through the transmission systems to the transmission network.


Bisri Power Station (Charles Helou)


Geographic Location
  • It is located on the left bank of Awali river 32m above sea level; its waterfall s located at an altitude of 194m.
  • The bigger part of the power plant was built underground and became operational in May 1968.
Awali Pond
  • It is located at the lower end of Boulous Arqash power plant.
  • It has a capacity of 300,000 m3.
  • It takes the water discharged by the turbines of Boulous Arqash power plant, in addition to the water flowing from Bisri river to the balancing lake at the foot of Boulous Arqash power plant.
Joun Tunnel

Water flows from the pond through a 6800m tunnel, connected at its end to Charles Helou power plant by means of a steel penstock with a discharge capacity of 33m3/s.

  • The production system in Bisri station is made up of two units, each with a power supply of 24 MW and a Francis water turbine with a vertical axe.
  • The overall power of the plant is thus: 24 MW x 2 = 48 mW

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