<p>This study presents an experimental investigation of the effect of symmetrical crossing jets on cohesive sedimentary beds, focusing on the influence of key hydraulic and physical parameters, including jet crossing angle, distance from the water surface to the crossing point, tailwater depth, and bed resistance, on the dimensions of scour holes. The findings reveal that scour hole morphology in cohesive sediments exhibits similarities to non-cohesive beds, with the crossing jet angle being the most significant factor influencing scour dimensions. Increasing the crossing angle led to a substantial reduction in scour hole dimensions, with depth, length, and width decreasing by 68, 40, and 47%, respectively. Furthermore, tailwater depth and crossing point distance from the water surface were found to reduce scour hole dimensions by 32, 15, and 15% for depth, length, and width, respectively, as tailwater depth increased. Increasing bed resistance through soil compaction and moisture content resulted in further reduction in scour hole dimensions, with average decreases of 38, 26, and 29% for depth, length, and width, respectively. Empirical models, based on polynomial regression, were developed and validated, demonstrating high predictive accuracy with <i>R</i>² exceeding 0.91, NRMSE of less than 8.2%, and MAE of below 1.02. These findings contribute to a deeper understanding of scour mechanisms in cohesive sediments and provide a robust framework for predicting scour behavior under varied hydraulic conditions, offering significant implications for design of hydraulic structures.</p>