Port Authority of New South Wales manages numerous seaports along the southeastern coast of Australia. To be responsible stewards of the Australian coast, Port Authority needed to carefully manage its assets by moving beyond a 2D environment with static plans and maps. The organization realized that a living digital twin of all its facilities could improve their understanding of the current state of all assets and the environment, helping them fine-tune operations and undertake new projects with a high level of confidence. Using Bentley applications, they created 3D models tagged with detailed engineering and environmental data, captured and processed fresh images of the facilities, and published the models and site data into a unified digital twin. The visualization reduces the need for site visits, and digital management empowers a variety of projects that benefit the local economy. The digital twin of the seaport areas is improving safety, livelihood, and ocean ecosystem health, and are actively driving the sustainable development of the blue economy.