L&T Uttaranchal Hydropower Limited (L&T UHL) has implemented the 99 MW run-of-the-river Singoli-Bhatwari Hydroelectric Project in Uttarakhand. The project was awarded in 2006 on Build, Own, Operate and Transfer (BOOT) basis, after a competitive bidding process by Government of Uttarakhand (GOU). L&T UHL signed the Implementation Agreement with GOU in November 2009.
The project is located on Mandakini River, the right bank tributary of Alaknanda River, in the Garhwal region in Rudraprayag district in Uttarakhand, India.
The plant features a barrage, with a medium-sized intake pond near Ukhimath, a 12 km long headrace tunnel and a surge shaft over 180 m in-depth. The plant houses 3 units of Voith Turbine generators of 33 MW each, equipped with a state-of-the-art switchyard and controlled via the latest Supervisory Control and Data Acquisition (SCADA) technology.
The SCADA systems are designed to automatically monitor and control plant and its equipment such as telecommunications, water and waste control to take timely decisions and actions. This provides uninterrupted power supply at minimum generation cost. Besides, the plant will cater to peak demand loads of 2½ hours each in both halves of the day, bringing relief even during non–monsoon months and meeting peak electricity demand.
The project was challenged by the rough terrain, dense forests and a small working window because of the extreme cold weather, landslides, and monsoon floods. Wet commissioning of this project commenced on September 21, 2020 with machine spinning.