South Pacific Oceania tunnels tenders

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A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment.

Oceania has a diverse mix of economies from the highly developed and globally competitive financial markets of Australia, New Caledonia, New Zealand, French Polynesia and Hawaii, which rank high in quality of life and human development index, to the much less developed economies such as Papua New Guinea, Indonesian New Guinea, Kiribati, Vanuatu and Tuvalu, while also including medium-sized economies of Pacific islands such as Palau, Fiji and Tonga. The largest and most populous country in Oceania is Australia, and the largest city is Sydney. The South Pacific has 14 countries including Australia, Papua New Guinea, New Zealand, Fiji, the Solomon Islands, Federated States Of Micronesia, Vanuatu, Samoa, Kiribati, Tonga, the Marshall Islands, Palau, Tuvalu, and Nauru.