The Limerick Tunnel (Tollán na Luimnigh in Irish) is an 900m long, twin-bore, immersed tube road tunnel underneath the River Shannon, which is currently under construction on the outskirts of Limerick City as part of phase 2 of the N7 Limerick Southern Ring Road. It will relieve another route, the N18, by removing traffic from the already congested Condell Road and Ennis Road.

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  • The Limerick Tunnel (Tollán na Luimnigh in Irish) is an 900m long, twin-bore, immersed tube road tunnel underneath the River Shannon, which is currently under construction on the outskirts of Limerick City as part of phase 2 of the N7 Limerick Southern Ring Road. It will relieve another route, the N18, by removing traffic from the already congested Condell Road and Ennis Road. Construction started on Phase 2 of the Limerick Southern Ring Road on 26 October 2006, when the then Minister for Transport, Martin Cullen, turned the sod on the project. Phase 2 will consist of 10 km (6 miles) of dual carriageway, 10 bridges, 6 underpasses, 4 interchanges and 900m (984 yards) of tunnel under the River Shannon. The scheme will link up to the N18 Ennis Road from a final interchange bridge near Cratloe Castle, which will be a twin-viaduct integral bridge structure. This will be the final junction on the N7 from Dublin. The project is expected to be completed by September 2010. The tunnel project is a PPP (Public Private Partnership), and will cost roughly €660m. The actual cost to the government, however, will only be around €360m. Direct Route will operate the tunnel for 35 years. The work is being carried out by a consortium of Strabag, John Sisk & Son Ltd, Lagan Holdings Ltd and Roadbridge Ltd. Dredging work for the tunnel trench was carried out by Dutch company Van Oord. The immersion process of floating the tunnel elements out into the Shannon was carried out by another Dutch company, Mergor.
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  • The Limerick Tunnel (Tollán na Luimnigh in Irish) is an 900m long, twin-bore, immersed tube road tunnel underneath the River Shannon, which is currently under construction on the outskirts of Limerick City as part of phase 2 of the N7 Limerick Southern Ring Road. It will relieve another route, the N18, by removing traffic from the already congested Condell Road and Ennis Road.
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  • Limerick Tunnel
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