At the foot of Swift Dam

At the foot of Swift Dam

David Grewe, filming at the foot of Swift Dam, gives some perspective to the magnitude of pent-up water that hung above the valley in 1964.

But how much water drained from the dam after its collapse on June 8?

We can only rely on an estimate — taken 17 miles downstream from the site of the collapse, when much of the water’s force had dissipated. At that point, hydrologists estimated the flow at 881,000 cubic-feet-per-second.

How much water is that? More than the flow rate of Mississippi River, sweeping down through homes set along Birch Creek. Photo by Benjamin Shors

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