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- W189879061 abstract "In 1983, the Province of Newfoundland and Labrador began building the Trans Labrador Highway (TLH). Upgrading and new construction was undertaken in 3 phases starting in 1997. Phase II (Red Bay to Cartwright), a 325 km all-weather gravel highway passing through uninhabited and undeveloped wilderness country, is intersected by 150 watercourses, ranging from small streams to large rivers (Alexis and St. Lewis). These 2 large rivers created difficult challenges for the planning and design of the 110 m single span truss bridges, including site optimization, road travel minimization and maintenance through mountainous terrain, and/or traversing deep tidal inlets. Environmental considerations using survey data from 1823 hydrometric surveys (depth soundings) were used along with a hydrological/hydraulic study (tidal effects), as well as river and ocean ice concerns. Bridge structures over the Alexis and St. Lewis Rivers consisted of steel truss designs with steel grid deck and reinforced concrete abutments. Problems encountered included route layout and selection, geoscience considerations, hydrology, hydraulics, causeway construction, bridge launching, and environmental issues. Weak clayey silts had to sustain a load of up to a 30 m high causeway at the abutments. Part of Phase III is the forthcoming bridge over the Churchill River. Problems include the search for a good crossing point, hydraulic design and hydrological considerations, foundation concerns, ice forces, and erection methods. Completion of the TLH will foster new opportunities in tourism, forestry, and mining; provide improved accessibility; and reduce travel costs." @default.
- W189879061 created "2016-06-24" @default.
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- W189879061 date "2003-01-01" @default.
- W189879061 modified "2023-09-26" @default.
- W189879061 title "BRIDGES ON THE TRANS LABRADOR HIGHWAY" @default.
- W189879061 hasPublicationYear "2003" @default.
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