Many towns and cities are facing the combination of an aging wastewater system and a steadily growing population. This presents several challenges to system owners and managers. They must ensure that customers (both existing and new) are adequately served by a collection system that may be deteriorating, undersized, or subject to high I/I. To maximize the benefit-cost ratio of capital improvement projects, one useful and common approach is the creation and periodic update of a system master plan. A master plan helps owners balance project priorities against system needs and funding availability. This presentation will provide an overview of some of the factors that owners and consultants may be considering when creating or updating a master plan. This includes, but may not be limited to: •An assessment of the existing system’s hydraulic capacity for both dry and wet weather scenarios, typically in conjunction with a hydraulic modeling effort. •An assessment of the condition of the system’s existing assets. This can be as broad or as specific as necessary to meet a client’s needs. Common tools for this effort include flow monitoring, manhole inspections, smoke testing, CCTV inspections, and lift station evaluations. •The development and/or adherence to an asset management program. These programs are typically reliant upon the periodically performing the above condition assessment. Common goals of an asset management program are to develop an asset registry, to determine the remaining useful life of all assets, to establish replacement costs of assets, and to create an expenditure profile for expected costs. •The creation of a recommended action plan (RAP). The RAP should consider the results of the hydraulic assessment, condition assessment, and asset management programs along with expected growth and development to produce a list of recommended actions based on priority, cost, and available funding. Broad examples of these actions include system rehabilitation, capacity upgrades, and pump station consolidations.