📋 Tender Overview
Scope : To Construct a 382 MW Sunni Dam Hydro-Electric Project in Shimla and Mandi districts of Himachal Pradesh The Sunni hydro electric project in Himachal Pradesh, India is expected to be commissioned in April 2028.
Rithwik Projects will construct a 382 MW Sunni dam hydro-electric project for Rs 1,098 crore for Satluj Jal Vidyut Nigam (SJVN), and a contract agreement for the EPC project was executed on 23 March 2023 for this purpose.
The infrastructure development is at full pace to facilitate timely execution of the run-of-the-river project and the on-site mobilization of major contractors to carry out civil and hydro-mechanical works. Rithwik expects to complete the hydro-electric project by November 2027.
The project will generate 1,382 million units annually and will contribute an equivalent of 1.1 million tonne annually towards carbon emission reduction.
The project is located in the Shimla and Mandi districts of Himachal Pradesh, on the river Satluj.
Powerhouse details
An underground powerhouse is to be constructed on the right bank of the river. The powerhouse cavern will be 171m long, 22.5m wide and 51.5m high. It will house six Francis turbines with a total installed capacity of 382MW. The turbines will be configured in 4 x 73MW main units and 1 x 73MW + 1 x 17MW auxiliary units.
The design of the four main units aims to provide operational flexibility and accommodate site constraints, while the two auxiliary units will manage environmental discharges during periods of low water flow.
The powerhouse cavern will be situated 200m within a hill, with an overlying rock cover of 300m. The transformer hall cavern will extend 175m in length, 18.7m in width and 27m in height.
Contractors involved
Rithwik Projects (RPPL), a construction company based in India, was awarded the engineering, procurement, and construction contract for the project in January 2023. The contract covers civil and hydro-mechanical works.
Voyants Solutions, an infrastructure consultancy services provider based in India, was responsible for preparing the draft environmental impact assessment report for the project.
