The pipe gallery is also split into two separate sections by the railroad tunnel and has essentially the same dimensions as the electrical gallery. Clearance is restricted by the mass array of piping suspended from the ceiling and leading through the barricade wall into the canyon side of the building. Like the electrical gallery, there are no openings into the canyon from the pipe gallery. All cell piping, except process transfer lines, was brought to the pipe gallery, terminating in connections on the wall. From here, connections were made to the weigh tanks and control boards in the operating gallery.
All connections are normal.
Chemical headers, electrical and steam distribution lines were also located in this gallery. The operating gallery is located above the pipe gallery and is similar to the electrical and pipe galleries, but is unique in that the railroad tunnel does not divide it into two parts. It runs the full length of the building and contains instrumentation and piping manifold stations for controlling the process in the canyon. Since the original construction of the building, three openings were made from the operating gallery into the canyon portion of the building. Two of the openings have since been sealed.