The Imo River is the border between two States, Rivers and Akwa-Ibom, in south-eastern Nigeria.
The Imo River is the border between two States, Rivers and Akwa-Ibom, in south-eastern Nigeria. Work on the construction of the Imo Bridge commenced early in the eighties. When the bridge piers and a total of 14 Km. of access roads were constructed, the project was halted. However in 1991, Julius Berger Nigeria, the Nigerian affiliate of Bilfinger & Berger, was awarded the contract for the completion of the bridge, by constructing the superstructure and an additional 4 Km. long road.
The bridge has a total length of 830 m. and consists of two end spans, each 55 m. long, and 9 standard spans with a length of 80 m.
The height of the bridge is 12 m. above the water.
The superstructure consists of a single-cell hollow box with an arched soffit and a carriageway slab, 11 m. wide, projecting 2.40 m. on each side. The carriageway slab will accomodate two lanes 4 m. wide.
A 138 m. launching scaffolding consisting of two parallel box girders, together weighing 620 tons, was used as service girder.
The second phase of the construction was completed in August 1992. The bridge and the roads were opened to traffic in spring 1993.
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| Project |
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IMO RIVER BRIDGE
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Location
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Port Harcourt (Nigeria) |
| Type |
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Continuous viaduct with 12T15 tendons with couplers
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| Main Client |
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FEDERAL MINISTRY OF WORKS AND HOUSING (Nigeria) |
| Contractor |
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BILFINGER+BERGER (Germany) |
| Designer |
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BILFINGER & BERGER INTERNATIONAL DIVISION (GERMANY) |
| Period |
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1991 - 1993 |