The works included a reconstruction of the existing utility tunnel. At first the existing water mains DN 200, 300, 500, 700 were dismantled and then the excavation works were done to achieve the required cross-section profile. The excavation was carried out under the protection of a jet grouting which was carried out from the surface. The reconstructed utility tunnel was equipped with standard steel racks and with technologies needed for future use by Kolektory Praha a.s..
