Chickamauga Dam and powerhouse. View of generator hall, looking towards reception room end. Upper row of three large windows is overlook for reception room. Three windows beneath are those of control room (compare with K 2313). Balcony for communication and view in front of control room windows. Roof is carried by rigid steel arches which spring from crane rail level; steel purlins, exposed precast concrete slab. Windows of hall are glass brick for insulation. Translucent plastic discs suspended from standard highboy lighting units conceal view or direct reflection of filaments and reflect spill light onto ceiling, thus generally brightening the space. Floor is ceramic tile; walls, glazed structural tile up to crame rail, exposed concrete above