Ulaanbaatar, Mongolia is undertaking a significant infrastructure project to address aging flood control systems and rehabilitate its sewer network. The city’s existing flood defenses, dating back to 1963, are largely nearing the end of their lifespan, as highlighted by widespread flooding in June 2024. The “Soil Water and Flood Protection” project will involve constructing 95.5 km of new flood protection embankments and channels, alongside rehabilitating 40 km of sewer lines using a no-dig technology. The project is divided into two phases, with the first phase focused on new flood defenses and funded by the World Bank. Environmental and social impact assessments for both phases are over 90% complete. The no-dig sewer rehabilitation aims to minimize disruption to city life by avoiding extensive excavation. The project’s feasibility study was discussed by the Science, Technology and Innovation Council of the Ministry of Construction and Urban Development.