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Tucson Water (TW) is a municipal water company serving potable and reclaimed water to more than 216,000 services in the greater Tucson, Arizona, area. In mid 2004, TW completed a three-year project to convert more than 1,600 paper water-system maps to an ArcSDE geodatabase. This paper will discuss the process and problems encountered while automating the process of creating an all-pipe hydraulic model using data contained in the geodatabase. Automating the process gives Engineers the ability to quickly create hydraulic models for specific geographic areas that are calibrated to specific time periods, while eliminating cumbersome manual upkeep, maintenance, and manipulation of the model data required for specific hydraulic analysis.