This standard Code for Engineering Geological Investigation for Small and Medium Hydropower Projects was first issued in 2009.This standard has been proposed by and under the jurisdiction of the Technical Committee on Standardization of Hydropower and Water Resources Planning and Design.

This standard was drafted by HYDROCHINA Kunming Engineering Corporation.

The leading authors ofthis standard： WANG Wenyuan， WANG Zigao，XIAO Wanchun， LI Kaide， TANG Xianliang and YANG Yicai.

The English version of the Hydropower Investigation and Design Standards has been prepared by the HYDROCHINA International Engineering Co. Ltd， and reviewed and approved by HYDROCHINA CORPORATION.

The English version of this standard was translated by GUO Weixiang， ZHENG Kexun， LIU Jinyang， ZHONG Guohua and LU Xiaocang， and reviewed by LI Tianfu， LIU Xiaofen， LI Zhong， QI Guoqing， ZHANG Dongsheng， HOU Hongying， WAN Jun and PENG Shuojun.