For decades, Kitsap Regional Library staff have saved materials related to the library’s organizational history, and these materials have evolved into the Kitsap Regional Library Collection. But without the benefit of clear policies outlining its scope and boundaries, physical storage has become a problem, and staff lack guidance for the final disposition of materials that may not belong. Our work began by defining its scope through the expansion of a collection policy. We refined existing inventory tools into one inventory and assessment tool that describes currently held materials and structures the processing of future additions, and we produced documentation to guide staff through its use. Finally, we created a finding aid to provide a high-level overview of the collection. Our work defining and describing the Kitsap Regional Library Collection will leave staff able to identify, locate, and use its holdings, and with access to easy-to-use tools to continue processing efforts.