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SK Engineering & Construction, one of two South Korean partners in the project, said the top of one of five auxiliary earth-fill dams at the project “got swept away” on Sunday night after heavy rains.

https://www.google.co.jp/amp/s/www.washingtonpost.com/amphtml/world/asia_pacific/rescue-work-underway-in-villages-flooded-by-laos-dam-breach/2018/07/25/39ed731a-8fc7-11e8-ae59-01880eac5f1d_story.html