In spite of the perturbation related to the COVID-19 pandemic, the civil engineering works is progressing well. Figure 1 shows the civil engineering status.

At Point 1, the final lining of the underground structures is fully completed and the installation of metallic structures, concrete modules, separation walls and safe rooms in the cavern and in the shaft is progressing. The underground works are expected to be completed by October 2021 with one month of delay with respect to the contractual date-mainly due to the impact of COVID-19. Figure 2 shows the US/UW cavern and the UA/UR galleries. At the surface, the construction of the cooling tower building (SF) and of the cryogenic compressor building (SHM) is progressing according to the contractual schedule and their delivery is scheduled by end of August 2021. Figure 3 shows the two new buildings on the surface worksite at Point 1. The construction of the three-remaining building (SD, SE & SU) will start in Summer 2021. The final delivery of the civil engineering works at Point 1 is expected by September 2022 with one month of delay with respect to the contractual date, again mainly driven by the impact of the pandemic.

At Point 5, the final lining is also progressing well. The concreting of part of the cavern vault bocks and of the shaft remains to be done. The installation of the underground infrastructures (metallic structures, separation walls, safe rooms…) will follow. The underground works are expected to be completed by February 2022 with two months of delay with respect to the contractual date (including the impact of the COVID-19 delay assessed to 1.5 month). At the surface, the construction of the cooling tower building (SF) and of the cryogenic compressor building (SHM) is close to completion and their delivery is scheduled by end of June 2021 with two months of delay with respect to the contractual date (including the impact of the COVID-19 delay assessed to 1 month). Figure 4 shows the inside of the two-first surface buildings. The construction of the three-remaining buildings(SD, SE & SU) has started with the drilling and the installation of the stabilization piles. The final delivery of the civil engineering works at Point 5 is expected by November 2022 with two months of delay with respect to the contractual date mainly due to the COVID-19 impact.

All the present identified delays at Point 1 and Point 5 have minor impacts on the HL-LHC master schedule.