The reclamation took six years to complete and cost S$60 million. Another S$120 million was spent to bring water, electricity, gas and telecommunication infrastructure from Sentosa to the islands. The submarine services link consists of a 1.2-kilometre trench holding utility lines that lie 17 metres underwater. It links Sentosa Cove to Kias Island, and is protected underneath 50,000 tonnes of rock. It holds two 12-inch (30 cm) gas pipelines, two 12-inch (30 cm) water pipelines, four 22 kV power cables and four 96 core fibre optic cables for telecommunications.