ENERGY GENERATION:<<<The 1200 MW Punatsangchhu-I Hydroelectric Project is envisaged to generate 5700 million units in an average year>>>

NOTIFICATION

Lockdown relaxation in PHPA-I and PHPA-II area in Bjimthangkha based on the test report of “Mass sweeping” of residents of PHPA-I and PHPA-II Township in Bjimthangkha.read more>>>

Confluence of Phochhu and Mochhu river near Punakha Dzong

Pnatsangchhu-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. 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

MAIN CIVIL WORKS

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

Construction of Diversion Tunnel, Dam, Intakes, and Desilting Chambers; including associated Hydro-Mechanical (HM) works was awarded to M/S Larsen & Lourbo.
Construction of Headrace Tunnel (HRT) from Adit-I & Adit-II. This was awarded to M/S Gammon India Ltd and stands Completed.
Construction of Headrace Tunnel (from Surge Shaft End) , Surge Shaft, Butterfly Valve Chamber, Pressure Shafts, Power House, and Tailrace Tunnel works was awarded to M/S Hindustan Construction Company.

IMG-20211122-WA0020
IMG_20211122_104013_536
IMG-20211122-WA0006
IMG_20211122_104032_505
Transmission Line
IMG-20211122-WA0009
                                                                                  Main Transmission
The 400 KV transmission system of the Project is entrusted to Bhutan Power Corporation Ltd. (BPC) (A RGoB Undertaking) on a “Deposit Work” basis. Power grid (A Government of India Undertaking) is the Consultant to BPC. BPC awarded the contract of two 400 KV Double Circuit Transmission Lines of 172 km length to M/s Jyoti Structures & Gammon (India) JV.
Latest News and Events

Lowering of Last Rotor (315T) in the Generator Barrel.

The last assembly of Generator Rotor weighing 315,000Kg for Generating Unit-5 has been completed and lowered in the Generator barrel on December 29, 2021 and thereby assembly and lowering of all the Stators (266,000kg) and Rotors for 6 nos. of Generating Units stands completed. The 3 nos. of Generating units had been boxed up and the same is in progress for other Units.

Celebration of SFD at PHPA-I, Bjimthangkha

Social Forestry Day is observed across all institutions in Bhutan since 1985, coinciding with the Coronation Anniversary of His Majesty the Fourth Druk Gyalpo. As every year, this year too, the Social Forestry Day was observed by PHPA-I Management & Officials with planting of tree saplings, hedges, stem cuttings, broadcasting of grass seeds to re-vegetate the Muck Disposal site of HRT Adit I in Khuma.read more>>>