The Ruth Lilly Auxiliary Library Facility (ALF) is a high-density shelving facility designed to alleviate shelving space constraints in the Indiana University Libraries. It provides low-cost housing with conservation-level environmental controls for library materials. Low-use film, media and print materials, archives, manuscripts, as well as rare and fragile materials are transferred to the ALF from the Indiana University Herman B Wells Library and many campus library locations.
The facility also includes the state-of-the-art E. Lingle Craig Preservation Laboratory, book freezers (to assist with treatment of water-damaged materials), space for accessioning, lending, and staff, as well as a secure collections vault with a capacity of approximately 6,400,000 bound volumes. The climate-controlled collections vault also includes a distinct film storage area with a special fire suppression system for film materials.