Building History Click image for low-res file    CO-83-P-1– View looking northwest at Building 701. Building 701 was used to design, build, and evaluate bench-scale technologies used in Rocky Flats Plant waste treatment processes. (1/98) (Hi-res [300 dpi]) CO-83-P-2 – View of the microwave melter developed by the research and development group located in Building 701. The microwave melter transformed waste into a glass-like substance, immobilizing the waste so that it could be shipped off site for disposal. (1/31/91) (Hi-res [300 dpi])