在爆炸发生的前一年，矿山安全和卫生署，一家负责监督矿山安全的联邦机构，引用了违反安全条例的Sago矿场多达208次。
In the year before the explosion, the mine safety and Health Administration (MSHA), a federal agency that monitors mine safety, cited the Sago mine 208 times for safety violations.
“我一直说这几年，但它肯定属于聋子的耳朵在上msha的联邦矿山安全与卫生管理局”Oppegard说。
"I've been saying this for years, but it certainly falls on deaf ears at MSHA (the federal Mine Safety and Health Administration)," Oppegard said.
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