技术报告-尾矿库设计及评估 (英文)(7)

from mining and milling operations. At some projects, tailings embankments reach several hundred feet in

height and the impoundments cover several square miles.

Historically, tailings were disposed of where convenient and most cost-effective, often in flowing water or

directly into drainages. As local concerns arose about sedimentation in downstream watercourses, water use,

and other issues, mining operations began impounding tailings behind earthen dams, which were often

constructed of tailings and other waste materials. The impoundments served the dual purpose of containing

the tailings and, particularly in the arid west, allowing the re-use of scarce water.

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