Since 2011, the Norwegian Water Resources and Energy Directorate is assisting the Liberian Hydrological Service in upgrading the Liberian hydrometric network. The project established 16 hydrometric stations in the principal river basins, 14 manual rainfall stations and it trained the LHS staff. After 30-years long break, the flows of Liberian rivers again are gauged and hydrological data are available to users. Continuous collection of hydrological data is particularly important for the ongoing and future hydropower studies and projects.