Raising awareness of the marine environment impact is crucial in mitigating global climate change. The ocean serves as one of the largest carbon dioxides sinks in the world. The significance of marine organisms such as phytoplankton, coral reefs, and chemical processes in seawater naturally absorb CO2 from the atmosphere. Additionally, massive ocean warming due to human activities and solar radiation can alter sea surface temperature patterns, thus affecting global weather patterns. The development of energy infrastructure such as coal-fired power plant construction poses high risks to global climate change due to emissions generated. Recent studies have focused on optimizing designs to reduce emissions from coal combustion, but little attention has been paid to the importance of the design maturation process for industrial waste treatment toward seawater. This research will discuss the optimization of designs carried out by PT Hutama Karya (Persero) to contribute to Marine Ecosystem conservation in the EPC Jawa 9 & 10 Suralaya Coal-Fired Power Plant Project. Water treatment is conducted in hot water processing from coal boiling processes used in electricity generation. The design of intake and outfall channels is carried out by integrating energy analysis and building information modeling (BIM) technology. Energy analysis is used to identify thermal dispersion systems while considering international standards required by International Finance Corporation (IFC). Therefore, the implementation of BIM plays a big role in ensuring the environmental sustainability by deciding the appropriate design that safe for the marine ecosystem.