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Bull Run Quake Science

A Cascadia earthquake will spell trouble for Portland's water supply. But is there any way to know how bad the shaking will be? Divers explore the protected Bull Run Lake, source of Portland's water, in search of evidence from past earthquakes that could shed light on how big the "big one" will be for the Portland area.

Portland Water Bureau

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<p>Scientist collecting core samples from Bull Run lake</p>
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<p>Scientist collecting core samples from Bull Run lake</p>