The new HL-LHC surface complex and underground galleries at Point 5

The surface complex consist of five buildings near the CMS site, Pt5, in France. Three are constructed from reinforced concrete to house noisy equipment such as helium compressors, cooling towers, water pumps, chillers and ventilation units. The other two buildings have steel-frame structures to house electrical distribution cabinets, a helium refrigerator cold-box and the shaft access system. The buildings are interconnected via buried technical galleries.