Mosul Dam Problem and Stability

Mosul Dam Problem and Stability

Nadhir Al-Ansari1* , Nasrat Adamo2, Mahdi Rasheed Al-Hamdani3, Kadhim Sahar4, Riyadh E. A. Al-Naemi5

1Lulea University of Technology, Lulea, Sweden 2Norrkoping, Sweden 3Minister of Water Resources, Ministry of Water Resources, Baghdad, Iraq 4D.G. State Organization of Dams and Reservoirs, Ministry of Water Resources, Baghdad, Iraq 5D. Mosul Dam, Dams and Reservoirs, Ministry of Water Resources, Baghdad, Iraq


Mosul Dam is located on the River Tigris about 60 km northwest Mosul in Iraq. It is the biggest dam where its storage capacity reaches 11.11 billion cubic meters at normal operational level (330 m. above sea level). The dam was constructed on alternating beds of karistified limestone, gypsum and marl. This dam suffered from water seepage under its foundation since its operation in 1986. Grouting operations were implemented since that time to overcome this problem. This seepage is believed to be due to dissolution of gypsum beds under the foundation, which was not carefully considered by the designers. It was recommended by the international board of experts that the water level should be kept at or below 319 m.a.s.l. to minimize damages in case of the failure of the dam. ISIS occupied the dam site on 8 August 2014 and it was seized back from the hands of ISIS on the 16th of the same month. They did plenty of damage despite the short period they occupied the area. After that, the Iraqi Ministry of Water Resources rebuilt the damaged parts and used new grouting and maintenance program. Now, the dam looks very safe at 319 m water level at its reservoir. In addition, the impounding was raised 325 m.a.s.l. for few days and nothing abnormal was noticed. Keywords Mosul Dam, Grouting, Stability, Tigris River, Iraq

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