Punatsangchhu-I Hydroelectric Project Authority (PHPA-I) is an autonomous body set up for implementation of 1,200 MW Punatsangchhu-I Hydroelectric Project (PHEP-I), the mutually beneficial Indo-Bhutan friendship Project. The project implementation started on November 11, 2008.

Rising at an altitude of ±7,000 masl in Gasa Dzongkhag (District) of Bhutan and fed by snow/glacial lakes from the Great Himalayan Range, the rivers Phochhu and Mochhu join at an altitude of ±1,200 masl at Punakha to form the Punatsangchhu river which flows southerly to enter the Indian plains.

Confluence of Phochhu and Mochhu river near Punakha Dzong

Confluence of Phochhu and Mochhu rivers near Punakha Dzong

The (1,200 MW) run-of-the-river PHEP-I in Wangduephodrang Dzongkhag in Western Bhutan is the first project of the 10,000 MW Hydro-power Development Initiative taken by the Royal Government of Bhutan (RGoB) and the Government of India (GoI) to be achieved by 2020. Designed to generate 5,670 million units of electricity in an average year, the Project utilizes 357 m head available in about 11 km length of Punatsangchhu. The Dam site is about 7 km downstream of Wangdue Bridge and all other project components are located on the left bank of the river between 7 km and 17 km downstream of the  Wangdue Bridge.

Latest News & Events

Joining of new Director (Technical) in PHPA-I

MD felicitating the new D(T)

The new Director (Technical) for PHPA-I, Mr. Bhupender Gupta has joined the Office of Director (Technical), PHPA-I on February 1, 2021 through a simple ceremony upon observation of necessary COVID-19 protocols where some key officials of PHPA-I & II offered their best wishes. read more>>>

2020 PHPA-I Foundation day:

The Management, Officials and Staff of PHPA-I observed the 13th Foundation Day of the Project at Bjimthangkha on 11th November, 2020 coinciding with the 65th Royal Birth Anniversary of His Majesty the Fourth Druk Gyalpo.The day was marked with hoisting of National Flag and singing of National Anthem with the Managing Director as the guest of honor.read more>>>

In Pictures


The Main Civil Works of the project has been divided into three packages: MC-1, MC-2, MC-3 (Civil & E&M).