The stability of river banks has always been a concern for land-use planners, stakeholders as well as the City of Winnipeg. Construction activities can generate different types of stress waves and ground vibrations. Operations such as blasting, pile driving, dynamic compaction for ground improvement purposes, and in-situ geotechnical investigation testing such as the Standard Penetration Test are the primary sources of construction-induced ground vibrations. To address slope instability, several techniques have been employed. Enhancing the slope stability can be done by building toe berms, armouring the slope along the waterline, constructing granular shear keys, and soil nailing. Constructing retaining walls with anchoring is another expensive but effective measure. One of the strategies adopted by the City of Winnipeg to mitigate the instability of the riverbank is to install rockfill columns. However, the installation of rockfill columns using vibro-impact sources, on the contrary, can generate ground vibrations leading to instability of the slopes due to compromising the ground conditions and altering the pore water pressure. This research aims to study the instability of river banks subjected to construction-induced vibrations. The soil deformations, variations of pore water pressure, and the level of vibrations of the Seine riverbank in the City of Winnipeg were monitored prior to, during the stabilization, and after installing a set of rockfill columns using sensing instruments including inclinometers, vibrating wire piezometers, accelerometers and geophones. The Finite Difference Method is used to simulate the impacts of vibrations numerically and the results compared to the field monitoring data. Also, the effects of construction-induced vibrations on global and local instability due to the shear failure in the soil layers are outlined. The numerical analysis demonstrated that despite the construction-induced vibrations remaining below the prescribed vibration thresholds set by the United States Bureau of Mines (1980), Office of Surface Mining and Reclamation Enforcement (1983), and the City of Toronto (2008), the occurrence of tensile cracks at the apex of the riverbank and various significant failure patterns were observed.