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Video by Sgt. Rodney Roldan

The Mosul Dam Project

Combined Joint Task Force - Operation Inherent Resolve

Sept. 1, 2018 | 3:11

Mosul Dam, formerly known as Saddam Dam, is the largest dam in Iraq. It is located on the Tigris River in the western governorate of Ninawa, upstream of the city of Mosul. The dam serves to generate hydroelectricity and provide water for downstream irrigation. At full capacity, the structure holds about 11.1 cubic kilometres (2.7 cu mi) of water and provides electricity to the 1.7 million residents of Mosul. It is the fourth largest dam in the Middle East, as measured by reserve capacity, capturing snowmelt from Turkey, some 70 miles (110 km) north. Built on a karst foundation, concerns over the dam's instability have led to major remediation and rehabilitation efforts since the 2003 invasion of Iraq.

For several weeks in July and August 2014, Islamic State of Iraq and Syria held Mosul Dam. On August 7, 2014, the organization captured the dam complex from the Peshmerga. ISIL's control of the dam created fears that its power supply could be restricted or that its water flows to downstream areas would be greatly inhibited. In a less likely scenario, there were worries the dam could be breached, causing widespread flooding and destruction downstream.

On August 17, 2014, the Peshmerga and the Iraqi Army launched a successful operation to retake control of the dam from ISIL militants. United States airstrikes assisted the Kurdish and Iraqi military, damaging or destroying 19 vehicles belonging to ISIS, as well as striking an ISIL checkpoint near the dam.

In January 2016, U.S. General Sean MacFarland warned that the dam might undergo a "catastrophic" collapse. He added, "What we do know is this—if this dam were in the United States, we would have drained the lake behind it." Maintenance had suffered as ISIL had removed equipment and chased technicians away in August 2014, and the grouting schedule had not been maintained. He indicated that contingency plans are in the works to protect people downstream in case of a collapse.

In February 2016, the United States Embassy in Iraq warned of a "serious and unprecedented" danger of the dam collapsing and suggested that plans for evacuation should be made, as the cities Mosul, Tikrit, Samarra, and Baghdad could be at risk in the event of collapse, and that up to 1.5 million people could be killed due to the ensuing flash floods.

The repairs were started in October 2016. In May 2017, Iraqi Minister of Water Resources Hassan Janabi stated that no danger to the dam remained and it was going back to normal operation. Carlo Crippa, the project manager, said the dam structure now showed no significant signs of distress. (U.S. Army video by Sgt. Rodney Roldan)

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The Mosul Dam Project