https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8738477![Pouring floor slab K-306-4 Oak Ridge](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIzLTAzL2ZsODY3OTIyMDE4Mi1pbWFnZS5qcGc.jpg)
![Pouring floor slab K-306-4 Oak Ridge](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIzLTAzL2ZsODY3OTIyMDE4Mi1pbWFnZS5qcGc.jpg)
Pouring floor slab K-306-4 Oak Ridge
Pouring floor slab K-306-4 Oak Ridge
K-25-40 DOE photo Ed Westcott 1945 Oak Ridge Tennessee. Original public domain image from Flickr
Public DomainFree CC0 image for Personal and Business use