Orskaya CHP-1-GPP-4-Gaya 110 kV high-voltage transmission line with the total length of over 33 km will provide electric power for a new underground mine of Gaisky Mining and Processing Integrated Works. Construction activities were conducted for over a year and a half by teams of the Power Transmission Lines Service, drivers, equipment mechanics and specialists of three contracting organizations. The new power transmission line linking the thermal power plant of Orskaya CHP-1 and the step-down substation of Gaisky Mining and Processing Integrated Works is intended to provide backup power for Novaya Mine that was put into operation this summer. Power engineers of Orenburgenergo, a branch of IDGC of Volga, JSC (a member of Rosseti Group of Companies) employed over 50 units of modern heavy-duty special-purpose vehicles, including bulldozers, excavators, tractors, truck-mounted cranes, crane-drilling machines, hydraulic elevated work platforms, self-dumping trucks and crew motor vehicles. “Specialists installed 264 new metal and reinforce concrete poles, 207 reinforced concrete supports of mixed type rated for extremely hazardous icing zones, 113 km of wires, over 9 thousand state-of-the-art glass insulators,” comments Aleksandr Vakulin, Head of Capital Construction Department of Vostochnye (Eastern) Electrical Grids of Orenburgenergo, a branch of IDGC of Volga, JSC. Construction activities performed by specialists of Orenburgenergo included two complicated segments at the intersection between new and existing power transmission lines, such as overhead contact system of the tram routes of the railway and 220-500 kV lines owned by Open Joint- Stock Company Federal Grid Company of the Unified Energy System (FSK UES) – Backbone Electrical Grids (MES) of the Ural. After a series of successful tests, the new overhead power is completely ready for operation.