MICHAEL R. GORDON – Neglect May Do What ISIS Didn’t: Breach Iraqi Dam

WASHINGTON — More than 16 months after Iraqi and Kurdish forces reclaimed Mosul Dam from Islamic State fighters, the structure faces a new threat: the danger that it may collapse because of insufficient maintenance, overwhelming major communities downstream with floodwaters.

In the worst-case scenario, according to State Department officials, an estimated 500,000 people could be killed while more than a million could be rendered homeless if the dam, Iraq’s largest, were to collapse in the spring, when the Tigris is swollen by rain and melting snow. The casualty toll and damage would be much less if Iraqi citizens received adequate warning, if the dam collapsed only partially or if it were breached in the summer or fall, when the water level is lower.

President Obama underscored the need to make emergency repairs in a call Wednesday with Prime Minister Haider al-Abadi, in which the two also discussed recent advances by Iraqi security forces against the Islamic State in Ramadi, in western Iraq, the White House said. Gen. Joseph F. Dunford Jr., the chairman of the Joint Chiefs of Staff, reiterated the urgent need to maintain the dam during a meeting with Mr. Abadi in Baghdad on Thursday, according to a senior Defense Department official.

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