Asahan No. 1 Hydropower Station in Indonesia Undertaken by CGGC Realized Water Storage ahead of Schedule

The hydropower station formally met the standard for power generation

Construction site of the water diversion tunnel project of Asahan No. 1 Hydropower Station in Indonesia

Interior view of the water diversion tunnel of Asahan No. 1 Hydropower Station

At 8:00AM, December 4, 2009 local time, the water diversion tunnel project of Asahan No. 1 Hydropower Station in Indonesia started storing water, and was qualified for power generation. This marks the hydropower station was completed two months ahead of time.
Located on the upstream of the Asahan River in Sumatera Utara of Indonesia, Asahan No. 1 Hydropower Station is the largest hydropower station project under construction in the province, with a total installed capacity of 180,000kw. After completion, the station will have an annual capacity of 1.13 billion kwh, 7% of the total power generation in the province.
The Three Gorges Branch of CGGC has won the tender and undertaken the water diversion system project of the hydropower station. The project consists of a round tunnel with a full length of 6.5km and a diameter of 9m and a surge shaft with a height of 67m and a diameter of 18m. The surge shaft is now the largest over-the-ground steel structured surge shaft in Asia.
Since the project commenced in June 2006, the Asahan Project Department of the Three Gorges Branch of CGGC reasonably allocated human resources, material resources and financial resources to meet the challenge posed by the serious geological defects, optimized the construction plan, carried out the scientific management, and created a number of records for the construction of water diversion tunnels in Indonesia, including the excavation of the 9m-diameter large section by 240m every month via a single work face and the excavation of the water diversion by 2,167m from a single direction. During the fabrication and installation of the tallest and largest steel structured surge shaft in Asia for which there was no precedence, the project department adopted new processes and methods to successfully complete the constructions and created a new record in Asia.
Completion of the hydropower station will give a boost to the local economic development and serve as a permanent sign for the China-Indonesia friendship.