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

Originating 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 ± 1212.2m masl at the iconic Punakha Dzong (Fortress) to form the Punatsangchhu river which then flows southerly to enter the Indian plains as Sankosh.

Confluence of Phochhu and Mochhu river near Punakha Dzong

Confluence of Phochhu and Mochhu rivers (El. 1212.2m) near Punakha Dzong

This run-of-the-river Project located by the  7-21 km stretch of Wangdue-Tsirang National Highway in Wangduephodrang Dzongkhag in Western Bhutan is the first project under the 10,000MW Hydropower Development Initiative undertaken by the Royal Government of Bhutan (RGoB) and the Government of India (GoI). Designed to generate 5,670 million units of electricity in an average year, the Project utilizes 357 m of head available in about 11 km length of Punatsangchhu river. 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 21 km downstream of the  Wangdue Bridge.

Latest News & Events


It is notified that the Tender No. PHPA-I/CE (P&C)/Tenders/146/2021/273 invited for providing Consultancy Services for Rationalization of Human Resources for Punatsangchhu-I Hydroelectric Project (PHEP-I) is hereby canceled.

Inconvenience caused is regretted.

Annual Performance Agreement (APA) for Fiscal Year (FY) 2021-22 of PHPA-I signed.

The Annual Performance Agreement (APA) for Fiscal Year (FY) 2021-22 of the PHPA-I was signed between the Hon’ble Minister for Economic Affairs cum Chairman of PHPA-I and the Managing Director & the Joint Managing Director of PHPA-I on 4th September 2021 at Thimphu. The event was attended by Dasho Bharat Tamang Yonzen, Member-Royal Privy Council, Mr. Karma P. Dorji, Director-Department of Hydropower & Power Systems (DHPS)-MoEA, Director (Finance) & Director (Technical), PHPA-I and other Sr. Officials from DHPS and PHPA-I.read more>>>

Installation of Royal Portrait at Bjimthangkha Township of PHPA-I & II

Wednesday, September 1, 2021: Coinciding with the auspicious 25th day of the 7th month of the Bhutanese calendar, the Managements of PHPA-I & II unveiled the Royal Portrait installed in the garden near the main gate of the office & residential complex of the two Projects. The Managements of both the Projects & senior officials of PHPA-I along with employees from Environment Circle were present to mark the occasion..read more>>> 

28.08.2021: Launching of the Project’s Quality Assurance Manual – 2021

The Project’s Quality Assurance Manual – 2021 was launched by the PHPA-I Management coinciding with the farewell event organized by the Officer’s Club for the outgoing Chief Research Officer, Quality Control Division who has compiled the Manual based on his experiences gained through his association in the construction of Tala, Mangdechhu and Punatsangchhu-I HEPs..read more>>> 

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