Ecological justification of design decisions related to the use of water resources for hydropower deployment of recently acquired particular urgency in connection with the failure of development section of the draft Impact Assessment (EIA). Under the existing regulatory and legal acts of the EIA documents to substantiate investment is sufficiently extensive material that is not fully respected and worked out. The article presents the shortcomings in assessing the impact of the proposed activity on the environment, identified on the basis of analysis of the project materials to deploy hydropower facilities on the mountain rivers.