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.

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Visit of the GoI delegation to PHPA-I

The GoI delegation led by Shri Raj Kumar Goyal, Addl. Secretary (Financial Advisor), MEA and accompanied by Shri Siddhartha Nath, Director (Finance), MEA along with Shri R. Gaurav Shresth, Dy. Chief of Mission, Embassy of India to Bhutan and Ms. Dawa Chhoedron, Offtg. Director General, DHPS, MoEA-RGoB visited the PHPA-I on November 8, 2019.

The delegation was received by the Management and Sr. Officials of the Project at the Dam conference hall and subsequently, the Management made a presentation on the Project to the delegation. Later, in the afternoon, the delegation made site visits to the Dam site, Head Race Tunnel and Powerhouse of the Project. After the visit, the delegation departed to Punakha.