Specifications - Dublin Sea Port Tunnel, Republic of Ireland

Key Data
Sponsor	Dublin Corporation (on behalf of National Roads Authority)
Main contractor	Nishimatsu/Mowlem/Irishenco (NMI) consortium
Designers	Charles Haswell, Carl Bro (now called Grontmij)
Construction supervisors	Brown and Root
TBM shaft and reception chambers	Mowlem Piling Intrafor
TBM shaft and reception chambers	Mowlem Piling Intrafor
Shaft crane	Sennebogen
Cost	€448 million
Cost of TBM shaft and reception chambers	€25 million
Tunnel length (including overground section)	6.5km
Bored tunnel	2.6km
Cut and close tunnel	1.9km
Tunnel liner segments	3,032 (weighing 8t each)
Tunnel specifications
Bore width	11.77m (37ft)
Lane width (two per bore)	3.65m (11ft)
Shoulder width (two per bore)	1m (3ft)
Bore height	4.9m (16ft)
Operating height	4.65m (15ft)
Lowest point	-30m (-95ft) at Marino