Assiut Barrages Repairs and Upgrades
Between 1934 and 1938 the Egyptian Government carried out extensive remodeling works at the barrage and the Ibrahimiya head regulator, principally extending the piers, grouting, extending the approach slabs and updating the hydro-mechanical equipment. The dam was remodeled in 1938 to increase the permissible head to 13.8-foot (4.2 m) from the 13.0-foot (4.0 m) head that was allowed under its original design. In 1956 works were carried out at the Ibrahimiya head regulator as a result of significant scour holes that developed downstream of the structure. Extensions to downstream concrete apron were completed as well as lengthening of the southern lock wall. Some further grouting works and replacement of the lock gates took place in the 1970s. In 1979 a reinforced concrete pedestrian footbridge was constructed on the downstream side of the head regulator. Between 1984 and 1986 a program of cement grouting works was undertaken at the barrage, though there are no records of the head regulator receiving similar treatment. After more than 100 years in service, the civil works have been affected by age and also by tailwater erosion as a consequence of a modified river regime after the construction of the Aswan High Dam.
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