In underground resource development the capital cost and lead time associated with drill platform development make early drill coverage incremental, irregular and less systematic than exploring from surface. This presents a significant challenge for geologists at underground mines: the need to commit to financial and strategic decisions based on limited data. The intent of this paper is to describe an attempt to maximise value derived from drillhole data at Sunrise Dam Gold Mine via construction of a three-dimensional (3D) geological model. The approach was primarily driven by the need to understand structural architecture at depth to guide target generation and optimise exploration efforts. The workflow applied included the completion of mine scale interpretations of deposit geology in cross section and plan, supported by targeted re-logging, to provide a sound foundation for the construction of a representative 3D model. Modelling was completed in Leapfrog and integrated these new interpretations with all available datasets. Modelling utilised interval selections of grouped lithologies or lithogeochemical classification to resolve inconsistency in the underlying logging data, where necessary, combining manual inputs with implicit modelling to capture key geometries and relationships. In parallel with model development, key skills and processes have been improved, such that long term adoption and refinement of the model has become a self-sustaining team effort. The two-dimensional (2D) interpretations, modelling process and resulting 3D model have delivered insights relevant to exploration targeting, including constraints on where permeability existed for mineralising fluids. The benefits of a more representative model have also propagated through to other parts of the mining cycle, providing more effective inputs to resource estimation, geotechnical engineering and geometallurgy. CITATION: Browning, F, Clark, H, Ulrich, S and Clark, F, 2019. Developing the geological model for Sunrise Dam Gold Mine insights from exploration to mining, in Proceedings Mining Geology 2019, pp 108122 (The Australasian Institute of Mining and Metallurgy: Melbourne).