The management of water retaining structures and their environmental impacts are critical aspects of hydraulic engineering studies. From an environmental perspective, hydraulic structure planning is primarily concerned with the design of the water-releasing sections (outlet) of the water retaining structures. It is essential that such structures are properly designed in order to meet the requirements of sustainability of the surrounding ecological system. This study aims to examine the impact of hydraulic jump stilling basin length and energy dissipation blocks on scour depth and reach an optimum performance of the stilling basin. To this end, an experimental study was conducted to investigate the effect of the stilling basin's baffle blocks on the river bed scour downstream of a water-retaining structure. Several hydraulic parameters were incorporated in the analysis and design of the stilling basin. The study introduces a novel approach to estimating the maximum scour based on a non-linear regression model.