Defining the Legacy Compute Center: Model Language for Distinguishing Existing Computing from Data Centers

This working paper provides model language for local land-use codes to distinguish existing computing inside ordinary buildings (Legacy Compute Centers) from new large-scale data centers. It offers a physical-change test verifiable from utility records, load-based tiers tied to public thresholds, and separate rules for water and generation. Includes a full reference version with methods, jurisdictional survey, and appendices, plus a shorter policy brief. Illustrative model language; not legal advice. The author works for companies that own and operate computing facilities in Colorado. Thresholds are drawn from public bodies.