The article is devoted to identifying the modal parameters, such as natural frequencies, appropriate mode shapes, and damping, of a steel footbridge constructed in 2018, situated in the western part of Slovakia. Experimental measurements were repeatedly conducted under ambient conditions. An automated procedure was utilized to generate a Finite Element Method (FEM) model from the 2D project documentation provided by the footbridge administrator. Modal parameter identification from the data was performed using the open-source program PyOMA for Operational Modal Analysis. Subsequently, the FEM model was verified, validated, and updated based on these findings. The agreement between the identified and calculated mode shapes was assessed using the Modal Assurance Criterion. Furthermore, the results were compared with those obtained during the design stage.