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K-25 Plant

K-25 Plant is a Tennessee historical marker in Roane County.

At K-25 overlook on east side of Hwy 58

Get directions ↗Start a road tripHistorical trails

As a part of the Manhattan Project, the K-25 plant was designed to house work on separating U-235 from U-238 through the gaseous diffusion process. At the time of its construction, it was the largest industrial complex in history. Plant construction began in 1943 and was completed in 1945. Over 25,000 construction personnel worked on this plant. The main building exceeded 44 acres in size.

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Historical maps covering this location

Example

For example, one family's tree showed the Articles of Confederation marker in Pennsylvania standing under a mile from where William Gabby lived in the 1760s.

What that marker records spans 1777 to 1789, overlapping William Gabby's years there.

From one family's 77-marker roster

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Marker text and location from the Tennessee Historical Commission, as the Commission publishes them on its marker map.

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