Archeologists used a noninvasive, remote-sensing technique at the end of October to see if artifacts were buried at the Fort Clatsop replica site.

Kendal McDonald was getting the lay of the land under the fort’s footprint with a magnetometer. With the heavy apparatus strapped to her waist, she carefully guided the machine along a precise grid pattern. The high-tech device detects subtle changes in the earth’s magnetic field that occur when the ground has been disturbed by, for example, a campfire, a pit or a trench. It collects data at 10 readings a second.

McDonald’s survey is the first step in a project which is expected to
continue through November, including the Bicentennial commemoration Nov. 11 through 15. It will give visitors the opportunity to watch the work and speak with the archaeologists as they search the site.

Video by Daily Astorian
reporter Sandra Swain

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