This study aims to analyze the provisions of the FIDIC Standard in Engineering, Procurement and Construction (EPC) integrated construction contracts in the dispute between the Consortium of PT Waskita Karya (Persero) Tbk–PT Jakarta Prima Cranes and PT Suprabari Mapanindo Mineral, as well as to examine the effectiveness of arbitration as a dispute resolution mechanism for FIDIC-based construction disputes in Indonesia. This research employs an empirical legal method using statutory, conceptual, and case approaches. Data were collected through library research and document analysis related to the dispute and were analyzed qualitatively. The findings indicate that the FIDIC Standard in EPC contracts provides comprehensive provisions concerning risk allocation, claims procedures, variations, dispute resolution mechanisms, and the rights and obligations of the parties. However, its implementation in practice still encounters challenges regarding harmonization with national law, as there is no explicit regulation governing the legal status of FIDIC within the Indonesian legal system. The study further reveals that arbitration is a relatively effective dispute resolution mechanism due to its confidentiality, procedural flexibility, expertise of arbitrators, and the final and binding nature of arbitral awards. Nevertheless, its effectiveness is constrained by high costs, the complexity of technical evidence, and potential obstacles in enforcing arbitral awards. Therefore, clearer harmonization between FIDIC standards and Indonesian law is necessary to enhance legal certainty, justice, and the effectiveness of dispute resolution in integrated construction projects in Indonesia.