![general motors technical center circa 1956](https://www.hrcengr.com/wp-content/uploads/2017/01/gm_tech_center.jpg)
In 1946, HRC designed the original site work for the GM Tech Center in Warren. Sewage treatment did not exist in Warren at the time. HRC was selected to design a primary treatment plant. The building housing the treatment units was designed by the architect who designed all of the Technical Center buildings, the world famous Eero Saarinen.