Hydropower is crucial for addressing the growing global demand for sustainable energy solutions. In New Zealand, hydroelectric units form the backbone of the country's renewable energy infrastructure. The management of the Waikato Hydroelectric Scheme is crucial, as it not only ensures a reliable energy supply but also optimises the utilisation of natural resources. Digital River is a powerful decision management platform that enhances Mercury’s energy generation operations. Acting as an analytical digital twin, it leverages artificial intelligence to simulate, plan, and optimise critical decisions while effectively navigating the complexities of hydrology, operations, sustainability, and Mercury’s strategic partnerships.