OAK RIDGE, Tenn. — A piece of Oak Ridge history, stuck in the past, is now serving a new purpose at the K-25 Site.
Portal 4 recently went through a year-and-a-half-long restoration through the Community Reuse Organization of East Tennessee (CROET) and is now open for business.
For decades, thousands of employees at K-25 used Portal 4 as their employee entrance into the gaseous diffusion plant, but after operations at K-25 stopped, Portal 4 sat empty…