The Toktogul hydropower plant (HPP), with an installed capacity of 1.2GW, is the biggest power plant in Kyrgyzstan accounting for approximately 40% of the country’s power output. The plant generates approximately 6,000GWh of electricity a year using four vertical Francis turbines of 300MW each. A joint venture of GE Hydro (France) and GE Renewables (Switzerland) was awarded a turnkey contract worth $104m for the Toktogul hydropower plant rehabilitation project. Our participation in this project is the surfaces machining of the upper ring and the lower ring. Due to the location (5000 km), apart from technical challenges, the project was a huge logistical challenge. The machining Power Station and landscapes