Hot metals building before sunrise. It is in this building that the FS and FC smelter furnaces are housed. The two constructs of pipe and catwalks to the left are built around the two furnace boilers, one for the FS furnace and one for the FC furnace. These boilers recover much of the waste heat that is used to create the steam necessary to generate electricity (among other uses) at the on-site powerhouse steam turbine driven generator. The third construct on the right of the boilers houses the emissions particulate filters (bag houses) which is the first of several steps in the pollution abatement process.