This paper explores the application of Structural Health Monitoring (SHM) as a decision-making tool for the preservation of the Nibelungen Bridge in Worms (NBW), a prestressed concrete (PC) bridge completed in 1953. The NBW exhibits damage mechanisms that are characteristic of PC-structures of that era, including corrosion of tendons and inadequate shear load-bearing capacity. To address these issues, an initial SHM system was installed in May 2023. The present study proposes damage identification strategies aimed at preserving the NBW. By leveraging SHM data, the study explores both model-based and data-based approaches to ensure the long-term safety and functionality of this historic structure.