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This English version is one of China’s energy sector standard series in English. Its translation was organized by China Renewable Energy Engineering Institute authorized by National Energy Administration of the People’s Republic of China in compliancewith relevant procedures and stipulations.This English version was issued by National Energy Administration of the People’s Republic of China in the Announcement [2021] No. 1dated January 7, 2021. This version was translated from the Chinese Standard NBT 10074-2018,Specification for Engineering Geological Mapping of Hydropower Projects,published by China Water & Power Press.The copyright is reserved by National Energy Administration of the People’s Republic of China.In the event of any discrepancy in the implementation,theChinese version shall prevail.