They can be many meters deep and several kilometers wide.

尾矿坝可能有很多米深、几千米宽。

At old mining sites, waste and tailings ponds could be processed for their remaining resources.

在旧矿场，废物和尾矿池可以处理剩余资源。

The dams are some of the largest structures in the world.

尾矿坝是世界上最大的结构。

I think the mining industry is on an annual basis,   producing 12 billion tons of tailings.

我认为采矿业每年生产 120 亿吨尾矿。

This lets Biomason substitute things like mine tailings for part of the sand that would otherwise be used.

这让 Biomason 可以用尾矿类的东西来代替原本可以使用的部分沙子。

A tailings dam is the most common waste disposal method for a mining company, whether it is mining iron ore, gold or copper.

尾矿坝是矿业公司处理废弃物最常见的方法，废弃物包括但不限于铁矿石、金子、铜。

The investors said they hope to finish a database of dam risks by late January 2020 and to create worldwide safety standards.

调查人员，们希望能在2020年1月末前做好关于尾矿坝风险的数据库，同时希望能创建个适用于全球范围的安全标准。

And here just over my shoulder, these are the old workings, what they call tailings, it's waste effectively, from previous mine workings.

就在我的肩膀上，这些是旧矿井，们称为尾矿，它是以前矿井工作中的有效废物。

Yet there are no established standards, or rules, defining what a tailings dam is, how to build one and how to care for a dam when it is no longer in use.

但目前并没有明确的标准、规定，没有关于尾矿坝的明确定义，没有规定如何建造并维护已经弃不用的尾矿坝。

The production of ore sand is increasingly  being seen as a valuable by-product from the mining industry and one that avoids the  generation of hazardous waste known as tailings.

矿砂的生产越来越被视为采矿业的种有价值的副产品，并且可以避免产生称为尾矿的危险废物。

At old mining sites, waste and tailings ponds could be processed for their remaining resources, but the mines themselves would also need to be cleaned up and monitored for decades to prevent the poisoning soils and water supplies.

在旧矿区，可以对废料和尾矿池进行处理，以获取剩余资源，但矿区本身也需要进行清理，并进行数十年的监测，以防止土壤和水源污染。

In order to keep this water source pure, these tailings ponds have to be carefully designed and managed, so that mining chemicals don't leach into the ground water below and pollute the watershed of the Continental Divide.

为了保持这个水源的纯净，这些尾矿池必须经过精心设计和管理，这样采矿化学品才不会渗入下面的地下水中，污染大陆分水岭的分水岭。