T This research aims to examine the Real Operation and Maintenance Needs Figures (AKNOP) and assess the performance of the physical aspects of the Karian Dam which is located in Lebak Regency, Banten Province. This dam has an important function in providing water for irrigation, flood control, and the water needs of the surrounding community. The study was conducted to determine AKNOP parameters, performance scores, and efficiency of dam operation and maintenance management. The research methodology includes analysis of dam technical data, assessment of physical aspects, and preparation of AKNOP based on direct, indirect and unexpected cost components. Performance assessment is carried out by measuring the condition of elements such as the dam body, intake structures, discharge structures, spillways and saddles. The research results show that routine, periodic and special AKNOPs need to be planned taking into account the actual condition of the infrastructure. In addition, the physical performance of the Karian Dam shows varying values depending on the components evaluated. This research provides recommendations for increasing operational and maintenance efficiency in order to maintain the sustainability of the dam\\\'s function and benefits for society.