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By Bert Smith
Them Dam Writers 

The mystery of the concrete bunker


Last updated 2/5/2020 at 10:05am

An abandoned reinforced-concrete bunker, built partially underground, sits atop an isolated granite mountain knob approximately a mile south of the Grand Coulee Dam; approximately 330 feet above the western shoreline of Lake Roosevelt. From September 1941 to August 1942 the United States Coast and Geodetic Survey would construct a recording seismographic station. The bunker would house a seismo...

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