Crews in California worked to repair damage done to the spillway of the Oroville Dam.

加州工作人员正努力维修奥罗维尔大坝泄洪道。

The drought in the western United States is putting California's reservoirs, like Lake Oroville, at dangerously low levels.

美国西部的干旱使加州奥罗维尔湖等水库处于危险的低水位。

Water levels in Lake Oroville are now higher than average, Lake Shasta also above average for this time of year.

奥罗维尔湖的水位高于平均值，同时今年沙斯塔湖的水位也高于同期。

Lake Oroville is a reservoir in Northern California.

奥罗维尔湖是北加州的一个水库。

Its dam, the Oroville Dam, is the tallest in America.

它的大坝，奥罗维尔大坝，是美国最高的大坝。

All these are things  that the Oroville Spillway either didn't have or weren't done properly.

所有这些都是奥罗维尔溢洪道没有或没有正确完成的事情。

And the water in the Oroville spillway is moving a lot faster than this.

奥罗维尔溢洪道的水流速度比这快得多。

That's exactly what  happened at Oroville.

这正是奥罗维尔发生的事情。

Modern spillway  designs have lots of features that help to avoid what happened at Oroville.

现代溢洪道设计有很多特点，有助于避免奥罗维尔发生的事情。

Officials in California are preparing to inspect the damage to an overflow channel on the Oroville dam, the tallest in the United States.

加利福尼亚官员正准备检查美国最高的奥罗维尔大坝泄洪道。

In cities Oroville, Yuba City, Marysville, they are evacuated in what some describe as a frantic, chaotic situation.

在 Oroville、Yuba City、Marysville 等城市，他们在一些人形容为疯狂、混乱的情况下被疏散。

Officials are also keeping an eye on Oroville Dam, which we told you about last week.

官员们也在密切关注我们上周向您介绍过的奥罗维尔大坝。

The repairs and rebuilding of the spillways at  Oroville Dam are a whole other fascinating story.

奥罗维尔大坝溢洪道的修复和重建是另一个令人着迷的故事。

One of those storms  happened in February upstream of Oroville Dam.

其中一场风暴发生在二月份的奥罗维尔大坝上游。

Spillways are often the  most complex and expensive components of a dam, and that is definitely true at Oroville.

溢洪道通常是大坝最复杂、最昂贵的组成部分，奥罗维尔确实如此。

At Oroville, the  emergency spillway consists of a concrete weir set one foot above the maximum operating  level.

在奥罗维尔，紧急溢洪道由混凝土堰组成，位于最高运行水位上方一英尺处。

Oroville Dam, located in northern California, is the tallest dam in the United States at 770 feet or 235 meters high.

奥罗维尔大坝位于加利福尼亚州北部，是美国最高的水坝， 高 770 英尺（235 米）。

The  reservoir created by the dam, Lake Oroville, is also immense - the second biggest in the state.

由大坝形成的奥罗维尔湖水库也很大，是该州第二大水库。

Completed in  1968, and owned and operated by the California Department of Water Resources, every part  of Oroville Dam is massive.

奥罗维尔大坝于 1968 年竣工， 由加州水资源部拥有和运营，每个部分都很庞大。

It had never been used in the 48 years that Oroville Dam had been there, until Saturday, when water started washing down the embankment.

在奥罗维尔大坝存在的 48 年里，它从未被使用过，直到星期六，水开始冲刷堤坝。