Cavico Bridge and Tunnel Construction Co. has won a US$6.2 million contract for tunnel construction at the 280-MW Theun-Hinboun Expansion project on Laos’ Nam Theun River.
Cavico Bridge and Tunnel Construction is a subsidiary of Cavico Corp., an infrastructure development company based in Hanoi. The contract, announced February 5, calls for the company to build a 1,000-meter-long tunnel and a 45-meter-deep dismantling shaft.
Cavico expects to complete the construction in 24 months. The first phase of the project, preparing roads to transport a tunnel boring machine, is to be completed by July 2009.
The main contractor, Cooperativa Mutatori e Cementisti ï¿½ CMC di Ravenna of Italy, awarded the contract. Andritz Hydro is equipping the project under terms of an 85 million euro (US$109 million) contract. (HNN 12/12/08)
Theun-Hinboun Power Co. Ltd., the project’s owner, is expanding 210-MW Theun-Hinboun, completed in 1998 with VA Tech Hydro equipment. The expansion includes a 220-MW addition to Theun-Hinboun power station, plus a new 60-MW Nam Gnouang hydropower plant, a six-kilometer headrace tunnel, and a new 70-meter-tall roller-compacted-concrete dam on the Nam Gnouang River, a tributary of the Nam Theun.
The expansion is to begin commercial operation in June 2012, generating more than 3,000 gigawatt-hours annually.