The British Columbia Geological Survey (BCGS) manages and maintains a library of over 38,300 mineral Assessment Reports. These reports have been filed by the exploration and mining industry since 1947 and describe exploration work costing over 2.8 billion dollars. The reports contain information on geology, geophysics, geochemistry, drilling, prospecting and physical work.After a one-year confidentiality period, this information is available for planning mineral exploration investment, research studies, land-use planning and resource management. The mineral reports are reviewed for compliance with the Mineral Tenure Act Regulations and indexed in the ARIS (Assessment Report Indexing System) database.