Cavico Corp. announced that Cavico Transportation, its wholly owned subsidiary, has signed a contract, estimated to be approximately USD9.43 million, for tunnel construction at Huoi Quang hydropower plant. The total length of tunnel is 9,895.89 metres. Its external diameter is 9 m and the internal diameter equals 7.5 m. The geology is porphyric rock and rhyolite. The planned method of excavation is drill and blast and conventional excavator equipped with bucket. The planned techniques for support and lining are wire mesh, rock bolts, sprayed concrete with concrete admixtures and steel arches. The planned technique for transportation of excavated rock is loaders and dumper trucks. Cavico Transportation has initiated the process of transporting both equipment and personnel to the site. The expected date for start of excavation works is April 2008. The engineering consultancy supervising the works is Power Engineering Consulting Company No 1 (PECC1). The plant is expected to generate 520 MW of power upon completion. It is anticipated to be one of the four largest hydropower plants in Vietnam. Visit www.cavicovn.com 18/08.