Development of safety plan to improve OHS (occupational health and safety) performance for construction of dam (supporting infrastructure) based on WBS (work breakdown structure)

Dam is an infrastructure that has many benefits for human survival such as a water reservoir which is the solution to the current crisis of clean water in Indonesia. The clean water crisis was anticipated by the government by constructing dam in critical areas with a target of 29 dams to be completed by 2019. But it is not uncommon for work accidents to occur in dam construction that have an impact starting from minor injuries to fatal ones such as death. So that, it is necessary to identify and analyse potential hazards early to prevent such accidents. This research aims to develop a safety plan for preparatory work of dam construction and cofferdam construction by identifying potential hazards that may occur in each work package by reviewing work methods, work activities, and WBS-based dam construction that has been standardized using the qualitative approach method. From the research, there are 20 risk sources of OHS that have the highest potential hazard in preparation work and cofferdam which were dominated by human resources and tools. Furthermore, safety plan had been developed based on the OHS risk sources obtained from the WBS for preparatory work and cofferdam.