The plant, which is expected to generate approximately 686 million kWh of energy annually for the region, is owned by the Central Hydropower Joint Stock Company, a Vietnam-based firm engaged in hydropower generation.
The breakthrough is scheduled to take place during the second week of April 2011.
Cavico had won a contract in July 2007 to excavate the headrace tunnel as well as four sub-tunnels, a surge tank, a vertical shaft, and a service access road.
The company broke through the first and second sub-tunnels in August and December 2010, respectively.
Cavico expects the A Luoi project to generate $53m in total revenues for the company.
Cavico employed the New Austrian Tunneling Method (NATM) and blasting method to excavate the main and sub-tunnels.
The plant is built on the A Sap River, located in Thua Thien Hue Province in central Vietnam.
