Caribbean 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.

The Caribbean is a region of the Americas that comprises the Caribbean Sea, its surrounding coasts, and its islands (some of which lie within the Caribbean Sea and some of which lie on the edge of the Caribbean Sea where it borders the North Atlantic Ocean). The region lies southeast of the Gulf of Mexico and of the North American mainland, east of Central America, and north of South America. The region, situated largely on the Caribbean Plate, has more than 700 islands, islets, reefs and cays (see the list of Caribbean islands). Countries in Caribbean are Antigua, Barbuda, The Bahamas, Barbados, Belize, Dominica, Grenada, Guyana, Haiti, Jamaica, Montserrat, Saint Kitts, Nevis, Saint Lucia, Saint Vincent, the Grenadines, Suriname, Trinidad and Tobago.