Heffner worked at the 200 East Area at Hanford during the Manhattan Project.
J. Heffner
Project Staff T-Plant/200 Areas
Hanford, WA
Manhattan Project VeteranProject Worker/Staff
![T-Plant](https://ahf.nuclearmuseum.org/wp-content/uploads/2014/06/T Plant under construction_0-1024x681.jpg)
Heffner worked at the 200 East Area at Hanford during the Manhattan Project.