The Bekasi River Flood Control Project Package 6 is a project located in the Bekasi Regency in the Babelan area, which is famous for its arid area and pollution. This project has experienced a delay in the project duration, and using the Fault Tree Analysis (FTA) method helps to identify the delay factors. This method is used as it also delivers easily understandable graphics and diagrams that display the cause-and-effect relationships between each factor. Questionnaires were given to 30 workers to identify the cause of the project delay. Delay factors from the owner’s, contractor’s, and consultant’s point of view are also identified. Based on the result of the FTA method on the Bekasi River Flood Control Project Package 6, it is identified that the main work item causing delay is the reinforcement of the retaining wall embankments. This work item delay is caused by a communication error between the owner, supervising consultant, and land acquisition.