ABSTRACT
The Tehri Pumped Storage Plant (PSP) Project is one of the prestigious ongoing mega projects in the state of Uttarakhand in Tehri Garhwal District, India. Prior Estimate of uncertainties and risks involved in the construction process is central to decision making in the underground projects. This Project aims to generate 1000 MW of power by harnessing the Hydro power potential of the mighty Bhagirathi River- the main tributary to the river Ganges.
The main feature of this project is its Tail Race Tunnels and Outfall structures, which will function as Tail Race Tunnels and Outfall in generation mode and as Head Race Tunnels and Power Intake structures in the pumping stage.
The present paper discusses advance identification of geological risks, design updating, and measures applied to reduce the risks in the construction of Twin Tail race Tunnels and outfall structures of Tehri Pumped Storage Hydro Project in the Indian Himalaya. The Paper also underlines the meticulous construction planning, on the spot resolution of the problem and visualization of geological risks involved at every stage of design and execution.
