The article considers the problems of justification of derivational micro-HPP usage for reserve water supply and standby power service of harbour installations for Russky Island. The first part of the article describes the justification of the power supply necessity for recreation facilities and yachting harbour installations (marinas) on Russky Island, including the prospect of their further development and new construction activities. The second part of the article considers the justification of innovative technologies usage of mobile derivational micro-HPP for recreation facilities and harbour installations power supply. The third part of the article deals with the principal design parameters for calculation of composite mobile diversion conduit and its cable-stayed system schemes which are used to fix the diversion conduit in light of wind effects. The forth part of the article shows the simulation modeling of the diversion conduit.