Information is being microfilmed and scanned in the Southern Urals to ensure the archival preservation of the unique, important and irreplaceable records documenting chronic low-level radiation exposure to workers and neighboring populations of the Mayak Production Association (MAYAK), as well as health effects. The records include dosimetric and epidemiologic information maintained on workers and neighboring populations located at facilities in Ozyorsk and Chelyabinsk. Microfilming is being done in Ozyorsk, and on a more limited basis in Chelyabinsk, where a scanning project has also recently been initiated. Over 1,800 rolls of film have been produced as of the fall of 1999. This article describes the background and results of this data preservation effort and includes brief summary tables describing the types of records being preserved. Researchers interested in access to these records should contact Paul Seligman, Deputy Assistant Secretary for the Office of Health Studies at the Department of Energy (DOE) for more information.