Nashville, Tennessee’s Metro Water Services (MWS) is responsible for a stormwater service area of 514 square miles which serves over 700,000 people and is currently divided into 63 sub-basins that includes 95,000 structures. MWS last inventoried the stormwater infrastructure in 2000. In 2022, the City decided to establish a plan to handle increased densities in development and implement a strategy or master plan to prioritize stormwater drainage system improvement projects. This presentation will cover the development of an objective prioritization ranking system for watersheds and projects. Additionally, work products will be reviewed which allow for internal MWS departments and stakeholders to be updated on progress and utilize the results from the master planning process. With a large service area and many different stakeholders providing input on where to begin, MWS needed a method to prioritize the various subbasins so that the basins are studied in order of most critical to least. Development density, areas of the city experiencing growth, and existing issues were determined to be critical factors for prioritizing the watershed basins. These factors highlight areas where the stormwater masterplan will impact the most people, will allow for improvements to be installed with private development, and will address existing issues with the stormwater system. Additionally, the social vulnerability index (SVI) was referenced to confirm that disadvantaged communities would be engaged early in the process. Additionally, when working on a county wide basis, there will be thousands of projects identified. MWS again needed an objective and defensible method to help rank these projects against one another. This ranking will help MWS target the projects that will provide the greatest impact to the community and allow them to effectively plan for their implementation. Finally, we will review project-specific tools created for data management. When working with a municipality as large as Metro Nashville, information and data dissemination can be a challenge. There are challenges with how the new data will be incorporated with the existing data and making the data available to all departments so they can be aware of progress and know when their projects need to coordinate with the results of stormwater master plan. We will show our innovative approach to handling these issues. This is an important project to MWS’ ongoing efforts to protect their investments, respond to aging and undersized infrastructure, and prepare for the future growth of Nashville and the rankings and tools developed are helping to drive project successes.