<p>Texas German is a contact variety that is the result of dialect mixing of several German dialects brought to Texas from central Europe starting in the 1830s. Since 2001, the Texas German Dialect Project has been assembling a large collection of spoken data documenting this unique variety. The present paper describes how a substantial part of this collection was developed into an annotated corpus and how the corpus is now available through a corpus platform based on the ZuMult technology. We start with an outline of the project’s development and its established processes of data collection, transcription, and dissemination. We then explain the process by which the data were cleaned up and enriched with language tagging, orthographic normalization, lemmatization, and part-of-speech tagging. Finally, we illustrate how the new corpus platform makes these annotated data available for systematic browsing and querying. In the outlook, we sketch prospects for future development of the data and for their role in a larger landscape of comparable speech island data.</p>