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Hydro-Power Plants and Tunnels

Ibrahim Abd El Al Power Plant

 

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Geographic Location
  • The power plant 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.
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Qaraoun-Markaba Tunnel
  • It takes water in from the Qaraoun lake through Markaba tunnel, which extends 6400m and around 3m diameter, it’s underground along the right riverbank.
  • It is connected to the power plant by means of a steel penstock of a maximum discharge capacity of 22 m3/s (waterfalls 200m, diameter around 2.6m)
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Description
  • It includes two power generation units with an individual power supply equal to 18 megawatts, and a vertical Francis turbine.
  • The overall power supply capacity of the power station is: 18 x 2 MW= 36mW

 

Paul Arcashe Power Plant (Awali)

 

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Geographic Location
  • It is located in the basin of Bisri River, on the left riverbank at 228.50 m above sea level.
  • Its compensating basin is located at an altitude of 630m (at Anane village, Saida- jezzine road).
  • It was completed and became operational in 1965 with two units only, but a third was added in 1981.
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Markaba-Awali Tunnel

It draws water from the Qaraoun lake after it comes out from the turbines of Abd El Al plant, 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 Anane compensating basin.

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Anane Compensating basin
  • The Anane compensating basin is located directly above the power station at 630m above sea level.
  • Its capacity ranges between 150,000 and 170,000 m3.
  • It supplies Awali power plant with water via a steel penstock with a discharge rate of 33 m3/s (waterfalls 400m, diameter around 3m).
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Description
  • The Paul Arcache Power Plant includes three units, each with a power supply of 36 MW, equipped with a pelton turbine (5 nozzles) with vertical shaft. The overall power supply of the power plant is: 36 MW x 3 = 108 MW
  • It is considered the biggest Hydro Power Plant in Lebanon, 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 plants to control production and streamline the function of the electric generators to properly transfer the produced power through the transmission systems to the transmission Lebanese network.

 

Charles Helou Power Plant (Joun)

 

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

Water flows from Awali compensating basin through a 6800m tunnel, connected at its end to Charles Helou power plant by means of a steel penstock with a discharge capacity of 30m3/s.

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Description
  • The Charles Helou Power Plant includes two units, each with a rated power of 24 MW equipped with a Francis turbine with a horizontal shaft.

 

  • The overall power supply of the power plant is: 24 MW x 2 = 48 MW

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