This data set contains the salt gaugings completed over the period 2016 - 2017 to establish a stage-discharge curve at the outlet of the Vallon de Nant catchment. The data set contains also the latest version of the estimated stage-discharge curve, compared to the theoretical curve estimated from the geometric properties of the weir. The salt gaugings have been obtained independently by two different research groups from Institute of Earth Surface Dynamics (IDYST), Faculty of Geosciences and Environement (FGSE), University of Lausanne (UNIL), Stream Biofilm and Ecosystem Research Laboratory (SBER), School of Architecture, Environmental and Civil Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland, The stream gauging station itself was constructed thanks to a joint funding by the Swiss Federal Institute for Forest, Snow and Landscape (WSL), University of Lausanne (chair of Prof. S. Lane) and ETH Zürich (chair of Prof. J. Kirchner). The gauging station is maintained by the Mountain Hydrology and Mass Movements research unit of the Swiss Federal Institute for Forest, Snow and Landscape (WSL) and by the Institute of Earth Surface Dynamics of University of Lausanne.