9 الموسم
158 حلقة
MegaStructures - Season 5 Episode 13 الحلقة 13
A team of experts mobilises to demolish, excavate and recycle a 25,000 ton dam built of concrete and steel. The pressure is on: they have just half the time needed to complete the job. Worse yet, their biggest challenge stands behind the old dam – one million cubic yards of boulders, gravel and sand that the river has stacked against it for nearly a century. To remove this blockade, the team gambles on a radical, dangerous plan that's never been tried before: turning the energy of a perfect storm against the debris. If they are not successful, a generation of endangered salmon returning to spawn may be wiped out.
- عام: 2012
- بلد: United States of America
- النوع: Documentary
- ستوديو: National Geographic
- الكلمة الرئيسية:
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