Hydraulic structure: Assiut, Egypt

Since its commissioning in 1902, the Assiut Barrage has played a key role in Egypt’s food self sufficiency. Today the barrage supplies up to 440 m³/s of water through its head regulator to irrigate some 690,000 hectares of land along the left bank of the Nile stretching some 300km from Assiut to the outskirts of Cairo.

Studies to assess the structural condition of the Assiut Barrage and to decide between rehabilitation and new construction extend back to the 1980’s. In early 2008, the Reservoir and Grand Barrages Sector of the Ministry of Water Resources and Irrigation awarded a consulting contract to a Joint Venture led by Lahmeyer International to develop the tender design for a new barrage, to draft tender documents, to manage the social and environmental impacts and to supervise the project construction. Construction is scheduled to begin in 2010 and to last for five years.

The new barrage at Assiut will comprise the following structures:

  • a sluiceway with 8 radial sluice gates each 17 m wide,
  • a double chamber navigation lock, with a chamber width of 17 m and a usable chamber length of 156 m,
  • a surface powerhouse with 4 bulb turbine generator units, each with an installed capacity of 8 MW,
  • a closure dam with a plastic concrete cut-off wall as the main sealing element,
  • a four lane road crossing of the Nile.

Lahmeyer is supporting the Project Owner to mitigate project-related environmental and social impacts. An Environmental Group is being established and trained. Measures are being implemented to predict, monitor and mitigate or avoid

construction and operation impacts. A three-dimensional finite-element groundwater model is being calibrated to simulate present and future groundwater levels in the upstream project area. 

ClientMinistry of Water Resources and Irrigation (MWRI), Cairo
Ministry of Electricity and Energy, Cairo
Executionsince 2008
Technical Data
  • No. of bulb turbines
  • Turbine discharge range
255 m³/s / 60 m³/s
  • Gross head range
5.0 m / 2.5 m
  • Annual energy output
200 GWh
  • Sluiceway capacity
7,000 m³/s
  • Navigation lock usable length/width
156 m / 17 m
  • Hydraulic model tests
  • Environmental and resettlement management
  • Geotechnical field/laboratory investigations
  • Tender design, tender documents
  • Tender evaluation, construction design
  • Supervision of construction and installation

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