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This report documents the initial phase of a project that developed, tested, and used a methodology and tool set for converting electronic transit agency fare card transaction data, the Puget Sound region’s ORCA electronic fare card, into information that describes how customers are using the transit system. The project used two nine week datasets. The first covers February 17, 2015, to April 14, 2015. The second covers from March 26, 2016, to May 27, 2016. The report describes the detailed steps necessary to combine ORCA transaction data with vehicle location data and other data sources in order to estimate ridership patterns and other information useful for transit planning and operational needs. Data provided includes origin/destination matrices by day-of-week, and time-of-day, transfer locations, and transfer details such as the distances walked in order to transfer and the time required to make those transfers. The detailed data processing flow is described. Also included is a detailed discussion of data privacy concerns, how those concerns were addressed in this project, and how they might be addressed as part of an ongoing business intelligence system. The report also illustrates a wide variety of uses for these types of data.