This paper proposes a policy for the sustainable operation of Kolkata Port drawing lessons from Brisbane Port. The paper analyses the operational challenges of Kolkata Port, the successful case of Brisbane Port and formulates policy based on comparison. The analysis suggests upstream restoration projects, river boundary maintenance and modernisation of dredging activities for port operations. Also, it emphasises efficient sediment disposal methods and eco-friendly practices. The policy suggestions in this paper provide a practical roadmap for Kolkata Port Trust and other stakeholders to improve port operations. Implementation of these will lead to better navigation, cost reduction and environmental benefits. This paper contributes original thought by synthesising lessons from the Brisbane Port case study and applying them to Kolkata Port. The policy suggestions are tailored to address the unique challenges of riverine ports like Kolkata.